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 //Designs/Tools/i2c_AVR_USB/SW/firmware/COPYING
 ,0 → 1,341
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+                            Preamble
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
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+  Finally, any free program is threatened constantly by software
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+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+    b) You must cause any work that you distribute or publish, that in
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+    part thereof, to be licensed as a whole at no charge to all third
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+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
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+    a warranty) and that users may redistribute the program under
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+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
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+These requirements apply to the modified work as a whole.  If
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+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
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+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
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+. You may copy and distribute the Program (or a work based on it,
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+. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
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+. You are not required to accept this License, since you have not
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+conditions are imposed on you (whether by court order, agreement or
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+license would not permit royalty-free redistribution of the Program by
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+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
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+It is not the purpose of this section to induce you to infringe any
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+This section is intended to make thoroughly clear what is believed to
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+. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
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+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+. If you wish to incorporate parts of the Program into other free
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+of preserving the free status of all derivatives of our free software and
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+                            NO WARRANTY
+. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+                     END OF TERMS AND CONDITIONS
+            How to Apply These Terms to Your New Programs
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) 19yy  <name of author>
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+Also add information on how to contact you by electronic and paper mail.
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+    Gnomovision version 69, Copyright (C) 19yy name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.

 //Designs/Tools/i2c_AVR_USB/SW/firmware/Makefile-avrusb.mega8
 ,0 → 1,84
+# Name: Makefile
+# Project: USB I2C
+# Author: Christian Starkjohann, modified for I2C USB by Till Harbaum
+# Creation Date: 2005-03-20
+# Tabsize: 4
+# Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
+# License: Proprietary, free under certain conditions. See Documentation.
+# This Revision: $Id: Makefile-avrusb.mega8,v 1.1 2006/12/03 21:28:59 harbaum Exp $
+SERIAL = `echo /dev/tty.[Uu][Ss]*`
+UISP = uisp -dprog=stk200
+# UISP = uisp -dprog=avr910 -dserial=$(SERIAL) -dpart=auto
+# The two lines above are for "uisp" and the AVR910 serial programmer connected
+# to a Keyspan USB to serial converter to a Mac running Mac OS X.
+# Choose your favorite programmer and interface.
+DEFINES += -DDEBUG
+DEFINES += -DDEBUG_LEVEL=1
+COMPILE = avr-gcc -Wall -O2 -Iusbdrv -I. -mmcu=atmega8 $(DEFINES)
+OBJECTS = usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o main.o
+# symbolic targets:
+all:    firmware.hex
+.c.o:
+        $(COMPILE) -c $< -o $@
+.S.o:
+        $(COMPILE) -x assembler-with-cpp -c $< -o $@
+# "-x assembler-with-cpp" should not be necessary since this is the default
+# file type for the .S (with capital S) extension. However, upper case
+# characters are not always preserved on Windows. To ensure WinAVR
+# compatibility define the file type manually.
+.c.s:
+        $(COMPILE) -S $< -o $@
+# Fuse high byte:
+# 0xc9 = 1 1 0 0   1 0 0 1 <-- BOOTRST (boot reset vector at 0x0000)
+#        ^ ^ ^ ^   ^ ^ ^------ BOOTSZ0
+#        | | | |   | +-------- BOOTSZ1
+#        | | | |   + --------- EESAVE (don't preserve EEPROM over chip erase)
+#        | | | +-------------- CKOPT (full output swing)
+#        | | +---------------- SPIEN (allow serial programming)
+#        | +------------------ WDTON (WDT not always on)
+#        +-------------------- RSTDISBL (reset pin is enabled)
+# Fuse low byte:
+# 0x9f = 1 0 0 1   1 1 1 1
+#        ^ ^ \ /   \--+--/
+#        | |  |       +------- CKSEL 3..0 (external >8M crystal)
+#        | |  +--------------- SUT 1..0 (crystal osc, BOD enabled)
+#        | +------------------ BODEN (BrownOut Detector enabled)
+#        +-------------------- BODLEVEL (2.7V)
+fuse:
+        $(UISP) --wr_fuse_h=0xc9 --wr_fuse_l=0x9f
+clean:
+        rm -f firmware.hex firmware.lst firmware.obj firmware.cof firmware.list firmware.map firmware.eep.hex firmware.bin *.o usbdrv/*.o firmware.s usbdrv/oddebug.s usbdrv/usbdrv.s
+# file targets:
+firmware.bin:   $(OBJECTS)
+        $(COMPILE) -o firmware.bin $(OBJECTS)
+firmware.hex:   firmware.bin
+        rm -f firmware.hex firmware.eep.hex
+        avr-objcopy -j .text -j .data -O ihex firmware.bin firmware.hex
+        ./checksize firmware.bin 8192 960
+# do the checksize script as our last action to allow successful compilation
+# on Windows with WinAVR where the Unix commands will fail.
+program: firmware.hex
+        avrdude -c usbasp -p atmega8 -U lfuse:w:0x9f:m -U hfuse:w:0xc9:m -U flash:w:firmware.hex
+program-nodep:
+        avrdude -c usbasp -p atmega8 -U lfuse:w:0x9f:m -U hfuse:w:0xc9:m -U flash:w:firmware.hex
+disasm: firmware.bin
+        avr-objdump -d firmware.bin
+cpp:
+        $(COMPILE) -E main.c

 //Designs/Tools/i2c_AVR_USB/SW/firmware/Makefile-avrusb.tiny45
 ,0 → 1,74
+# Name: Makefile
+# Project: USB I2C
+# Author: Christian Starkjohann, modified for I2C USB by Till Harbaum
+# Creation Date: 2005-03-20
+# Tabsize: 4
+# Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
+# License: Proprietary, free under certain conditions. See Documentation.
+# This Revision: $Id: Makefile-avrusb.tiny45,v 1.3 2007/06/07 13:53:47 harbaum Exp $
+# DEFINES += -DDEBUG
+# DEFINES += -DDEBUG_LEVEL=1
+DEFINES += -DF_CPU=12000000
+COMPILE = avr-gcc -Wall -O2 -Iusbdrv -I. -mmcu=attiny45 $(DEFINES)
+OBJECTS = usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o main.o
+# symbolic targets:
+all:    firmware.hex
+.c.o:
+        $(COMPILE) -c $< -o $@
+.S.o:
+        $(COMPILE) -x assembler-with-cpp -c $< -o $@
+# "-x assembler-with-cpp" should not be necessary since this is the default
+# file type for the .S (with capital S) extension. However, upper case
+# characters are not always preserved on Windows. To ensure WinAVR
+# compatibility define the file type manually.
+.c.s:
+        $(COMPILE) -S $< -o $@
+# Fuse high byte:
+# 0x5f = 0 1 0 1   1 1 1 1 <-- BODLEVEL0 (Brown out trigger level bit 0)
+#        ^ ^ ^ ^   ^ ^ ^------ BODLEVEL1 (Brown out trigger level bit 1)
+#        | | | |   | +-------- BODLEVEL2 (Brown out trigger level bit 2)
+#        | | | |   + --------- EESAVE (don't preserve EEPROM over chip erase)
+#        | | | +-------------- WDTON (WDT not always on)
+#        | | +---------------- SPIEN (allow serial programming)
+#        | +------------------ DWEN (ebug wire is enabled)
+#        +-------------------- RSTDISBL (reset pin is disabled)
+# Fuse low byte:
+# 0xdf = 1 1 0 1   1 1 1 1
+#        ^ ^ \ /   \--+--/
+#        | |  |       +------- CKSEL 3..0 (external >8M crystal)
+#        | |  +--------------- SUT 1..0 (crystal osc, BOD enabled)
+#        | +------------------ CKOUT (clock output enable)
+#        +-------------------- CKDIV8 (divide clock by eight disabled)
+clean:
+        rm -f firmware.lst firmware.obj firmware.cof firmware.list firmware.map *.bin *.o */*.o *~ */*~ firmware.s usbdrv/oddebug.s usbdrv/usbdrv.s
+# file targets:
+firmware.bin:   $(OBJECTS)
+        $(COMPILE) -o firmware.bin $(OBJECTS)
+firmware.hex:   firmware.bin
+        rm -f firmware.hex firmware.eep.hex
+        avr-objcopy -j .text -j .data -O ihex firmware.bin firmware.hex
+        ./checksize firmware.bin 4096 196
+# do the checksize script as our last action to allow successful compilation
+# on Windows with WinAVR where the Unix commands will fail.
+program: firmware.hex
+        avrdude -P/dev/ttyS0 -c stk500hvsp -p attiny45 -U lfuse:w:0xdf:m -U flash:w:firmware.hex -U hfuse:w:0x5f:m
+program-usb: firmware.hex
+        avrdude -P/dev/ttyUSB0 -c stk500hvsp -p attiny45 -U lfuse:w:0xdf:m -U flash:w:firmware.hex -U hfuse:w:0x5f:m
+disasm: firmware.bin
+        avr-objdump -d firmware.bin
+cpp:
+        $(COMPILE) -E main.c

 //Designs/Tools/i2c_AVR_USB/SW/firmware/Makefile-usbtiny.mega8
 ,0 → 1,17
+# ======================================================================
+# Makefile for i2c-tiny-usb
+#
+# Copyright (C) 2006 Till Harbaum
+#
+# This is free software, licensed under the terms of the GNU General
+# Public License as published by the Free Software Foundation.
+# ======================================================================
+USBTINY         = ./usbtiny
+TARGET_ARCH     = -DF_CPU=12000000 -DUSBTINY -mmcu=atmega8
+OBJECTS         = main.o
+FLASH_CMD       = avrdude -c usbasp -p atmega8 -U lfuse:w:0x9f:m -U hfuse:w:0xc9:m -U flash:w:main.hex
+STACK           = 32
+FLASH           = 8192
+SRAM            = 1024
+include $(USBTINY)/common.mk

 //Designs/Tools/i2c_AVR_USB/SW/firmware/Makefile-usbtiny.tiny45
 ,0 → 1,19
+# ======================================================================
+# Makefile for i2c-tiny-usb
+#
+# Copyright (C) 2006 Till Harbaum
+#
+# This is free software, licensed under the terms of the GNU General
+# Public License as published by the Free Software Foundation.
+# ======================================================================
+USBTINY         = ./usbtiny
+TARGET_ARCH     = -DF_CPU=12000000 -DUSBTINY -mmcu=attiny45
+OBJECTS         = main.o
+TTY             = /dev/ttyUSB0
+# TTY             = /dev/ttyS0
+FLASH_CMD       = avrdude -P$(TTY) -c stk500hvsp -p attiny45 -U lfuse:w:0xdf:m -U hfuse:w:0x5f:m -U flash:w:main.hex
+STACK           = 32
+FLASH           = 4096
+SRAM            = 256
+include $(USBTINY)/common.mk

 //Designs/Tools/i2c_AVR_USB/SW/firmware/checksize
 ,0 → 1,35
+#!/bin/sh
+# Name: checksize
+# Project: AVR Make system
+# Author: Christian Starkjohann
+# Creation Date: 2004-12-29
+# Tabsize: 4
+# Copyright: (c) 2005 OBJECTIVE DEVELOPMENT Software GmbH.
+# Revision: $Id: checksize,v 1.1.1.1 2006/11/09 18:27:00 harbaum Exp $
+error=0
+codelimit=2048  # default value
+datalimit=96    # default value; leave 32 bytes for stack
+if [ $# -gt 1 ]; then
+        codelimit="$2"
+fi
+if [ $# -gt 2 ]; then
+        datalimit="$3"
+fi
+set -- `avr-size -d "$1" | awk '/[0-9]/ {print $1 + $2, $2 + $3, $2}'`
+if [ $1 -gt $codelimit ]; then
+        echo "*** code size $1 exceeds limit of $codelimit"
+        error=1
+else
+        echo "ROM: $1 bytes (data=$3)"
+fi
+if [ $2 -gt $datalimit ]; then
+        echo "*** data size $2 exceeds limit of $datalimit"
+        error=1
+else
+        echo "RAM: $2 bytes"
+fi
+exit $error
 Property changes:
 Added: svn:executable
 +*
 \ No newline at end of property

 //Designs/Tools/i2c_AVR_USB/SW/firmware/main.c
 ,0 → 1,578
+/* Name: main.c
+ * Project: i2c-tiny-usb
+ * Author: Till Harbaum
+ * Tabsize: 4
+ * Copyright: (c) 2005 by Till Harbaum <till@harbaum.org>
+ * License: GPL
+ * This Revision: $Id: main.c,v 1.9 2007/06/07 13:53:47 harbaum Exp $
+ *
+ * $Log: main.c,v $
+ * Revision 1.9  2007/06/07 13:53:47  harbaum
+ * Version number fixes
+ *
+ * Revision 1.8  2007/05/19 12:30:11  harbaum
+ * Updated USB stacks
+ *
+ * Revision 1.7  2007/04/22 10:34:05  harbaum
+ * *** empty log message ***
+ *
+ * Revision 1.6  2007/01/05 19:30:58  harbaum
+ * i2c clock bug fix
+ *
+ * Revision 1.5  2007/01/03 18:35:07  harbaum
+ * usbtiny fixes and pcb layouts
+ *
+ * Revision 1.4  2006/12/03 21:28:59  harbaum
+ * *** empty log message ***
+ *
+ * Revision 1.3  2006/11/22 19:12:45  harbaum
+ * Added usbtiny support
+ *
+ * Revision 1.2  2006/11/14 19:15:13  harbaum
+ * *** empty log message ***
+ *
+ */
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <avr/pgmspace.h>
+#include <avr/wdt.h>
+#include <util/delay.h>
+#ifndef USBTINY
+// use avrusb library
+#include "usbdrv.h"
+#include "oddebug.h"
+#else
+// use usbtiny library
+#include "usb.h"
+#include "usbtiny.h"
+typedef byte_t uchar;
+#if! defined (__AVR_ATtiny45__)
+#define USBDDR DDRC
+#define USB_CFG_IOPORT PORTC
+#else
+#define USBDDR DDRB
+#define USB_CFG_IOPORT PORTB
+#endif
+#define USB_CFG_DMINUS_BIT USBTINY_DMINUS
+#define USB_CFG_DPLUS_BIT USBTINY_DPLUS
+#define usbInit()  usb_init()
+#define usbPoll()  usb_poll()
+#endif
+#define ENABLE_SCL_EXPAND
+/* commands from USB, must e.g. match command ids in kernel driver */
+#define CMD_ECHO       0
+#define CMD_GET_FUNC   1
+#define CMD_SET_DELAY  2
+#define CMD_GET_STATUS 3
+#define CMD_I2C_IO     4
+#define CMD_I2C_BEGIN  1  // flag fo I2C_IO
+#define CMD_I2C_END    2  // flag fo I2C_IO
+/* linux kernel flags */
+#define I2C_M_TEN               0x10    /* we have a ten bit chip address */
+#define I2C_M_RD                0x01
+#define I2C_M_NOSTART           0x4000
+#define I2C_M_REV_DIR_ADDR      0x2000
+#define I2C_M_IGNORE_NAK        0x1000
+#define I2C_M_NO_RD_ACK         0x0800
+/* To determine what functionality is present */
+#define I2C_FUNC_I2C                    0x00000001
+#define I2C_FUNC_10BIT_ADDR             0x00000002
+#define I2C_FUNC_PROTOCOL_MANGLING      0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
+#define I2C_FUNC_SMBUS_HWPEC_CALC       0x00000008 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC  0x00000800 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_PROC_CALL_PEC    0x00002000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL  0x00008000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_QUICK            0x00010000
+#define I2C_FUNC_SMBUS_READ_BYTE        0x00020000
+#define I2C_FUNC_SMBUS_WRITE_BYTE       0x00040000
+#define I2C_FUNC_SMBUS_READ_BYTE_DATA   0x00080000
+#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA  0x00100000
+#define I2C_FUNC_SMBUS_READ_WORD_DATA   0x00200000
+#define I2C_FUNC_SMBUS_WRITE_WORD_DATA  0x00400000
+#define I2C_FUNC_SMBUS_PROC_CALL        0x00800000
+#define I2C_FUNC_SMBUS_READ_BLOCK_DATA  0x01000000
+#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
+#define I2C_FUNC_SMBUS_READ_I2C_BLOCK   0x04000000 /* I2C-like block xfer  */
+#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK  0x08000000 /* w/ 1-byte reg. addr. */
+#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2  0x10000000 /* I2C-like block xfer  */
+#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
+#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC  0x40000000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE | \
+                            I2C_FUNC_SMBUS_WRITE_BYTE
+#define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA | \
+                                 I2C_FUNC_SMBUS_WRITE_BYTE_DATA
+#define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA | \
+                                 I2C_FUNC_SMBUS_WRITE_WORD_DATA
+#define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
+                                  I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
+#define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
+                                  I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
+#define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \
+                            I2C_FUNC_SMBUS_BYTE | \
+                            I2C_FUNC_SMBUS_BYTE_DATA | \
+                            I2C_FUNC_SMBUS_WORD_DATA | \
+                            I2C_FUNC_SMBUS_PROC_CALL | \
+                            I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
+                            I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
+                            I2C_FUNC_SMBUS_I2C_BLOCK
+/* the currently support capability is quite limited */
+const unsigned long func PROGMEM = I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+#ifdef DEBUG
+#define DEBUGF(format, args...) printf_P(PSTR(format), ##args)
+/* ------------------------------------------------------------------------- */
+static int uart_putchar(char c, FILE *stream) {
+  if (c == '\n')
+    uart_putchar('\r', stream);
+  loop_until_bit_is_set(UCSRA, UDRE);
+  UDR = c;
+  return 0;
+}
+static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL,
+                                         _FDEV_SETUP_WRITE);
+#else
+#define DEBUGF(format, args...)
+#endif
+/* ------------------------------------------------------------------------- */
+#define DEFAULT_DELAY 10  // default 10us (100khz)
+static unsigned short clock_delay  = DEFAULT_DELAY;
+static unsigned short clock_delay2 = DEFAULT_DELAY/2;
+static unsigned short expected;
+static unsigned char saved_cmd;
+#if! defined (__AVR_ATtiny45__)
+#define I2C_PORT   PORTC
+#define I2C_PIN    PINC
+#define I2C_DDR    DDRC
+#define I2C_SDA    _BV(4)
+#define I2C_SCL    _BV(5)
+#else
+#define I2C_PORT   PORTB
+#define I2C_PIN    PINB
+#define I2C_DDR    DDRB
+#define I2C_SDA    _BV(1)
+#define I2C_SCL    _BV(5)
+#endif
+static void i2c_io_set_sda(uchar hi) {
+  if(hi) {
+    I2C_DDR  &= ~I2C_SDA;    // high -> input
+    I2C_PORT |=  I2C_SDA;    // with pullup
+  } else {
+    I2C_DDR  |=  I2C_SDA;    // low -> output
+    I2C_PORT &= ~I2C_SDA;    // drive low
+  }
+}
+static uchar i2c_io_get_sda(void) {
+  return(I2C_PIN & I2C_SDA);
+}
+static void i2c_io_set_scl(uchar hi) {
+#ifdef ENABLE_SCL_EXPAND
+  _delay_loop_2(clock_delay2);
+  if(hi) {
+    I2C_DDR &= ~I2C_SCL;          // port is input
+    I2C_PORT |= I2C_SCL;          // enable pullup
+    // wait while pin is pulled low by client
+    while(!(I2C_PIN & I2C_SCL));
+  } else {
+    I2C_DDR |= I2C_SCL;           // port is output
+    I2C_PORT &= ~I2C_SCL;         // drive it low
+  }
+  _delay_loop_2(clock_delay);
+#else
+  _delay_loop_2(clock_delay2);
+  if(hi) I2C_PORT |=  I2C_SCL;    // port is high
+  else   I2C_PORT &= ~I2C_SCL;    // port is low
+  _delay_loop_2(clock_delay);
+#endif
+}
+static void i2c_init(void) {
+  /* init the sda/scl pins */
+  I2C_DDR &= ~I2C_SDA;            // port is input
+  I2C_PORT |= I2C_SDA;            // enable pullup
+#ifdef ENABLE_SCL_EXPAND
+  I2C_DDR &= ~I2C_SCL;            // port is input
+  I2C_PORT |= I2C_SCL;            // enable pullup
+#else
+  I2C_DDR |= I2C_SCL;             // port is output
+#endif
+  /* no bytes to be expected */
+  expected = 0;
+}
+/* clock HI, delay, then LO */
+static void i2c_scl_toggle(void) {
+  i2c_io_set_scl(1);
+  i2c_io_set_scl(0);
+}
+/* i2c start condition */
+static void i2c_start(void) {
+  i2c_io_set_sda(0);
+  i2c_io_set_scl(0);
+}
+/* i2c repeated start condition */
+static void i2c_repstart(void)
+{
+  /* scl, sda may not be high */
+  i2c_io_set_sda(1);
+  i2c_io_set_scl(1);
+  i2c_io_set_sda(0);
+  i2c_io_set_scl(0);
+}
+/* i2c stop condition */
+void i2c_stop(void) {
+  i2c_io_set_sda(0);
+  i2c_io_set_scl(1);
+  i2c_io_set_sda(1);
+}
+uchar i2c_put_u08(uchar b) {
+  char i;
+  for (i=7;i>=0;i--) {
+    if ( b & (1<<i) )  i2c_io_set_sda(1);
+    else               i2c_io_set_sda(0);
+    i2c_scl_toggle();           // clock HI, delay, then LO
+  }
+  i2c_io_set_sda(1);            // leave SDL HI
+  i2c_io_set_scl(1);            // clock back up
+  b = i2c_io_get_sda();         // get the ACK bit
+  i2c_io_set_scl(0);            // not really ??
+  return(b == 0);               // return ACK value
+}
+uchar i2c_get_u08(uchar last) {
+  char i;
+  uchar c,b = 0;
+  i2c_io_set_sda(1);            // make sure pullups are activated
+  i2c_io_set_scl(0);            // clock LOW
+  for(i=7;i>=0;i--) {
+    i2c_io_set_scl(1);          // clock HI
+    c = i2c_io_get_sda();
+    b <<= 1;
+    if(c) b |= 1;
+    i2c_io_set_scl(0);          // clock LO
+  }
+  if(last) i2c_io_set_sda(1);   // set NAK
+  else     i2c_io_set_sda(0);   // set ACK
+  i2c_scl_toggle();             // clock pulse
+  i2c_io_set_sda(1);            // leave with SDL HI
+  return b;                     // return received byte
+}
+#ifdef DEBUG
+void i2c_scan(void) {
+  uchar i = 0;
+  for(i=0;i<127;i++) {
+    i2c_start();                  // do start transition
+    if(i2c_put_u08(i << 1))       // send DEVICE address
+      DEBUGF("I2C device at address 0x%x\n", i);
+    i2c_stop();
+  }
+}
+#endif
+/* ------------------------------------------------------------------------- */
+struct i2c_cmd {
+  unsigned char type;
+  unsigned char cmd;
+  unsigned short flags;
+  unsigned short addr;
+  unsigned short len;
+};
+#define STATUS_IDLE          0
+#define STATUS_ADDRESS_ACK   1
+#define STATUS_ADDRESS_NAK   2
+static uchar status = STATUS_IDLE;
+static uchar i2c_do(struct i2c_cmd *cmd) {
+  uchar addr;
+  DEBUGF("i2c %s at 0x%02x, len = %d\n",
+           (cmd->flags&I2C_M_RD)?"rd":"wr", cmd->addr, cmd->len);
+  /* normal 7bit address */
+  addr = ( cmd->addr << 1 );
+  if (cmd->flags & I2C_M_RD )
+    addr |= 1;
+  if(cmd->cmd & CMD_I2C_BEGIN)
+    i2c_start();
+  else
+    i2c_repstart();
+  // send DEVICE address
+  if(!i2c_put_u08(addr)) {
+    DEBUGF("I2C read: address error @ %x\n", addr);
+    status = STATUS_ADDRESS_NAK;
+    expected = 0;
+    i2c_stop();
+  } else {
+    status = STATUS_ADDRESS_ACK;
+    expected = cmd->len;
+    saved_cmd = cmd->cmd;
+    /* check if transfer is already done (or failed) */
+    if((cmd->cmd & CMD_I2C_END) && !expected)
+      i2c_stop();
+  }
+  /* more data to be expected? */
+#ifndef USBTINY
+  return(cmd->len?0xff:0x00);
+#else
+  return(((cmd->flags & I2C_M_RD) && cmd->len)?0xff:0x00);
+#endif
+}
+#ifndef USBTINY
+uchar   usbFunctionSetup(uchar data[8]) {
+  static uchar replyBuf[4];
+  usbMsgPtr = replyBuf;
+#else
+extern  byte_t  usb_setup ( byte_t data[8] )
+{
+  byte_t *replyBuf = data;
+#endif
+  DEBUGF("Setup %x %x %x %x\n", data[0], data[1], data[2], data[3]);
+  switch(data[1]) {
+  case CMD_ECHO: // echo (for transfer reliability testing)
+    replyBuf[0] = data[2];
+    replyBuf[1] = data[3];
+    return 2;
+    break;
+  case CMD_GET_FUNC:
+    memcpy_P(replyBuf, &func, sizeof(func));
+    return sizeof(func);
+    break;
+  case CMD_SET_DELAY:
+    /* The delay function used delays 4 system ticks per cycle. */
+    /* This gives 1/3us at 12Mhz per cycle. The delay function is */
+    /* called twice per clock edge and thus four times per full cycle. */
+    /* Thus it is called one time per edge with the full delay */
+    /* value and one time with the half one. Resulting in */
+    /* 2 * n * 1/3 + 2 * 1/2 n * 1/3 = n us. */
+    clock_delay = *(unsigned short*)(data+2);
+    if(!clock_delay) clock_delay = 1;
+    clock_delay2 = clock_delay/2;
+    if(!clock_delay2) clock_delay2 = 1;
+    DEBUGF("request for delay %dus\n", clock_delay);
+    break;
+  case CMD_I2C_IO:
+  case CMD_I2C_IO + CMD_I2C_BEGIN:
+  case CMD_I2C_IO                 + CMD_I2C_END:
+  case CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END:
+    // these are only allowed as class transfers
+    return i2c_do((struct i2c_cmd*)data);
+    break;
+  case CMD_GET_STATUS:
+    replyBuf[0] = status;
+    return 1;
+    break;
+  default:
+    // must not happen ...
+    break;
+  }
+  return 0;  // reply len
+}
+/*---------------------------------------------------------------------------*/
+/* usbFunctionRead                                                           */
+/*---------------------------------------------------------------------------*/
+#ifndef USBTINY
+uchar usbFunctionRead( uchar *data, uchar len )
+#else
+extern  byte_t  usb_in ( byte_t* data, byte_t len )
+#endif
+{
+  uchar i;
+  DEBUGF("read %d bytes, %d exp\n", len, expected);
+  if(status == STATUS_ADDRESS_ACK) {
+    if(len > expected) {
+      DEBUGF("exceeds!\n");
+      len = expected;
+    }
+    // consume bytes
+    for(i=0;i<len;i++) {
+      expected--;
+      *data = i2c_get_u08(expected == 0);
+      DEBUGF("data = %x\n", *data);
+      data++;
+    }
+    // end transfer on last byte
+    if((saved_cmd & CMD_I2C_END) && !expected)
+      i2c_stop();
+  } else {
+    DEBUGF("not in ack state\n");
+    memset(data, 0, len);
+  }
+  return len;
+}
+/*---------------------------------------------------------------------------*/
+/* usbFunctionWrite                                                          */
+/*---------------------------------------------------------------------------*/
+#ifndef USBTINY
+uchar usbFunctionWrite( uchar *data, uchar len )
+#else
+extern  void    usb_out ( byte_t* data, byte_t len )
+#endif
+{
+  uchar i, err=0;
+  DEBUGF("write %d bytes, %d exp\n", len, expected);
+  if(status == STATUS_ADDRESS_ACK) {
+    if(len > expected) {
+      DEBUGF("exceeds!\n");
+      len = expected;
+    }
+    // consume bytes
+    for(i=0;i<len;i++) {
+      expected--;
+      DEBUGF("data = %x\n", *data);
+      if(!i2c_put_u08(*data++))
+        err = 1;
+    }
+    // end transfer on last byte
+    if((saved_cmd & CMD_I2C_END) && !expected)
+      i2c_stop();
+    if(err) {
+      DEBUGF("write failed\n");
+      //TODO: set status
+    }
+  } else {
+    DEBUGF("not in ack state\n");
+    memset(data, 0, len);
+  }
+#ifndef USBTINY
+  return len;
+#endif
+}
+/* ------------------------------------------------------------------------- */
+int     main(void) {
+  wdt_enable(WDTO_1S);
+#if DEBUG_LEVEL > 0
+  /* let debug routines init the uart if they want to */
+  odDebugInit();
+#else
+#ifdef DEBUG
+  /* quick'n dirty uart init */
+  UCSRB |= _BV(TXEN);
+  UBRRL = F_CPU / (19200 * 16L) - 1;
+#endif
+#endif
+#ifdef DEBUG
+  stdout = &mystdout;
+#endif
+  DEBUGF("i2c-tiny-usb - (c) 2006 by Till Harbaum\n");
+  i2c_init();
+#ifdef DEBUG
+  i2c_scan();
+#endif
+  /* clear usb ports */
+  USB_CFG_IOPORT   &= (uchar)~((1<<USB_CFG_DMINUS_BIT)|(1<<USB_CFG_DPLUS_BIT));
+  /* make usb data lines outputs */
+  USBDDR    |= ((1<<USB_CFG_DMINUS_BIT)|(1<<USB_CFG_DPLUS_BIT));
+  /* USB Reset by device only required on Watchdog Reset */
+  _delay_loop_2(40000);   // 10ms
+  /* make usb data lines inputs */
+  USBDDR &= ~((1<<USB_CFG_DMINUS_BIT)|(1<<USB_CFG_DPLUS_BIT));
+  usbInit();
+  sei();
+  for(;;) {     /* main event loop */
+    wdt_reset();
+    usbPoll();
+  }
+  return 0;
+}
+/* ------------------------------------------------------------------------- */

 //Designs/Tools/i2c_AVR_USB/SW/firmware/readme.txt
 ,0 → 1,38
+i2c-tiny-usb - (c) 2006 by Till Harbaum
+---------------------------------------
+http://www.harbaum.org/till/i2c_tiny_usb
+The firmware code itself is distributed under the GPL, but
+one of the usb codes comes under a separate license. Plase see
+the .txt files in usbdrv for details.
+The default configuration is for a attiny45. The Makefile.mega8
+allows to compile the device for the Atmega8 cpu. This includes
+the possibility to use the atmega8 rs232 for debugging.
+The attiny45 has to be programmed in high voltage serial
+programming (hsvp) mode since this application needs the
+reset pin to be reconfigured for other use.
+This project supports two usb implementations: the avrusb and
+usbtiny. Due to this four Makefiles exist:
+Makefile-avrusb.tiny45    - build with avrusb for Attiny45
+Makefile-avrusb.mega8     - build with avrusb for Atmega8
+Makefile-usbtiny.tiny45   - build with usbtiny for Attiny45
+Makefile-usbtiny.mega8    - build with usbtiny for Atmega8
+Just type
+ make -f Makefile-avrusb.xxx program
+or
+ make -f Makefile-usbtiny.xxx flash
+to compile and upload the file. Please adjust e.g. programmer
+settings in the Makefile.
+If you don't want to recompile the firmware yourself you might
+use the included firmware.hex which is a prebuilt binary for the
+attiny45. Plase make sure you adjust the fuses accordingly.
+They need to be set to "external crystal > 8Mhz" and the RESET
+pin has to be disabled in order to be re-used for application
+specific purposes. See Makefile-avrusb.tiny45 for more details.

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbconfig.h
 ,0 → 1,121
+/* Name: usbconfig.h
+ * Project: AVR USB driver
+ * Author: Christian Starkjohann, modified by Till Harbaum
+ * Creation Date: 2005-04-01
+ * Tabsize: 4
+ * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: Proprietary, free under certain conditions. See Documentation.
+ * This Revision: $Id: usbconfig.h,v 1.4 2007/05/19 12:30:11 harbaum Exp $
+ */
+#ifndef __usbconfig_h_included__
+#define __usbconfig_h_included__
+/*
+General Description:
+This file contains parts of the USB driver which can be configured and can or
+must be adapted to your hardware.
+*/
+/* ---------------------------- Hardware Config ---------------------------- */
+#if! defined (__AVR_ATtiny45__)
+#define USB_CFG_IOPORTNAME              C
+/* This is the port where the USB bus is connected. When you configure it to
+ * "PORTB", the registers PORTB, PINB (=PORTB+2) and DDRB (=PORTB+1) will be
+ * used.
+ */
+#define USB_CFG_DMINUS_BIT              0
+/* This is the bit number in USB_CFG_IOPORT where the USB D- line is connected.
+ * This MUST be bit 0. All other values will result in a compile error!
+ */
+#define USB_CFG_DPLUS_BIT               1
+/* This is the bit number in USB_CFG_IOPORT where the USB D+ line is connected.
+ * This may be any bit in the port. Please note that D+ must also be connected
+ * to interrupt pin INT0!
+ */
+#else
+#define USB_CFG_IOPORTNAME              B
+#define USB_CFG_DMINUS_BIT              0
+#define USB_CFG_DPLUS_BIT               2
+#endif
+/* --------------------------- Functional Range ---------------------------- */
+#define USB_CFG_HAVE_INTRIN_ENDPOINT    0
+/* Define this to 1 if you want to compile a version with two endpoints: The
+ * default control endpoint 0 and an interrupt-in endpoint 1.
+ */
+#define USB_CFG_INTR_POLL_INTERVAL              10
+/* If you compile a version with endpoint 1 (interrupt-in), this is the poll
+ * interval. The value is in milliseconds and must not be less than 10 ms for
+ * low speed devices.
+ */
+#define USB_CFG_IS_SELF_POWERED                 0
+/* Define this to 1 if the device has its own power supply. Set it to 0 if the
+ * device is powered from the USB bus.
+ */
+#define USB_CFG_MAX_BUS_POWER                   10
+/* Set this variable to the maximum USB bus power consumption of your device.
+ * The value is in milliamperes. [It will be divided by two since USB
+ * communicates power requirements in units of 2 mA.]
+ */
+#define USB_CFG_SAMPLE_EXACT                    1
+/* This variable affects Sampling Jitter for USB receiving. When it is 0, the
+ * driver guarantees a sampling window of 1/2 bit. The USB spec requires
+ * that the receiver has at most 1/4 bit sampling window. The 1/2 bit window
+ * should still work reliably enough because we work at low speed. If you want
+ * to meet the spec, set this value to 1. This will unroll a loop which
+ * results in bigger code size.
+ * If you have problems with long cables, try setting this value to 1.
+ */
+#define USB_CFG_IMPLEMENT_FN_WRITE              1
+/* Set this to 1 if you want usbFunctionWrite() to be called for control-out
+ * transfers. Set it to 0 if you don't need it and want to save a couple of
+ * bytes.
+ */
+#define USB_CFG_IMPLEMENT_FN_READ               1
+/* Set this to 1 if you need to send control replies which are generated
+ * "on the fly" when usbFunctionRead() is called. If you only want to send
+ * data from a static buffer, set it to 0 and return the data from
+ * usbFunctionSetup(). This saves a couple of bytes.
+ */
+/* -------------------------- Device Description --------------------------- */
+#define USB_CFG_VENDOR_ID               0x03, 0x04
+/* USB vendor ID for the device, low byte first. */
+#define USB_CFG_DEVICE_ID               0x31, 0xc6
+/* This is the ID of the device, low byte first. It is interpreted in the
+ * scope of the vendor ID. The only requirement is that no two devices may
+ * share the same product and vendor IDs. Not even if the devices are never
+ * on the same bus together!
+ */
+#define USB_CFG_DEVICE_VERSION  0x05, 0x01
+/* Version number of the device: Minor number first, then major number.
+ */
+#define USB_CFG_VENDOR_NAME             'T', 'i', 'l', 'l', ' ', 'H', 'a', 'r', 'b', 'a', 'u', 'm'
+#define USB_CFG_VENDOR_NAME_LEN 12
+/* These two values define the vendor name returned by the USB device. The name
+ * must be given as a list of characters under single quotes. The characters
+ * are interpreted as Unicode (UTF-16) entities.
+ * If you don't want a vendor name string, undefine these macros.
+ */
+#define USB_CFG_DEVICE_NAME             'i','2','c','-','t','i','n','y','-','u','s','b'
+#define USB_CFG_DEVICE_NAME_LEN 12
+/* Same as above for the device name. If you don't want a device name, undefine
+ * the macros.
+ */
+#define USB_CFG_DEVICE_CLASS    0xff
+#define USB_CFG_DEVICE_SUBCLASS 0
+/* See USB specification if you want to conform to an existing device class.
+ */
+#define USB_CFG_INTERFACE_CLASS         0
+#define USB_CFG_INTERFACE_SUBCLASS      0
+#define USB_CFG_INTERFACE_PROTOCOL      0
+/* See USB specification if you want to conform to an existing device class or
+ * protocol.
+ */
+#endif /* __usbconfig_h_included__ */

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/Changelog.txt
 ,0 → 1,134
+This file documents changes in the firmware-only USB driver for atmel's AVR
+microcontrollers. New entries are always appended to the end of the file.
+Scroll down to the bottom to see the most recent changes.
+-04-01:
+  - Implemented endpoint 1 as interrupt-in endpoint.
+  - Moved all configuration options to usbconfig.h which is not part of the
+    driver.
+  - Changed interface for usbVendorSetup().
+  - Fixed compatibility with ATMega8 device.
+  - Various minor optimizations.
+-04-11:
+  - Changed interface to application: Use usbFunctionSetup(), usbFunctionRead()
+    and usbFunctionWrite() now. Added configuration options to choose which
+    of these functions to compile in.
+  - Assembler module delivers receive data non-inverted now.
+  - Made register and bit names compatible with more AVR devices.
+-05-03:
+  - Allow address of usbRxBuf on any memory page as long as the buffer does
+    not cross 256 byte page boundaries.
+  - Better device compatibility: works with Mega88 now.
+  - Code optimization in debugging module.
+  - Documentation updates.
+-01-02:
+  - Added (free) default Vendor- and Product-IDs bought from voti.nl.
+  - Added USBID-License.txt file which defines the rules for using the free
+    shared VID/PID pair.
+  - Added Readme.txt to the usbdrv directory which clarifies administrative
+    issues.
+-01-25:
+  - Added "configured state" to become more standards compliant.
+  - Added "HALT" state for interrupt endpoint.
+  - Driver passes the "USB Command Verifier" test from usb.org now.
+  - Made "serial number" a configuration option.
+  - Minor optimizations, we now recommend compiler option "-Os" for best
+    results.
+  - Added a version number to usbdrv.h
+-02-03:
+  - New configuration variable USB_BUFFER_SECTION for the memory section where
+    the USB rx buffer will go. This defaults to ".bss" if not defined. Since
+    this buffer MUST NOT cross 256 byte pages (not even touch a page at the
+    end), the user may want to pass a linker option similar to
+    "-Wl,--section-start=.mybuffer=0x800060".
+  - Provide structure for usbRequest_t.
+  - New defines for USB constants.
+  - Prepared for HID implementations.
+  - Increased data size limit for interrupt transfers to 8 bytes.
+  - New macro usbInterruptIsReady() to query interrupt buffer state.
+-02-18:
+  - Ensure that the data token which is sent as an ack to an OUT transfer is
+    always zero sized. This fixes a bug where the host reports an error after
+    sending an out transfer to the device, although all data arrived at the
+    device.
+  - Updated docs in usbdrv.h to reflect changed API in usbFunctionWrite().
+* Release 2006-02-20
+  - Give a compiler warning when compiling with debugging turned on.
+  - Added Oleg Semyonov's changes for IAR-cc compatibility.
+  - Added new (optional) functions usbDeviceConnect() and usbDeviceDisconnect()
+    (also thanks to Oleg!).
+  - Rearranged tests in usbPoll() to save a couple of instructions in the most
+    likely case that no actions are pending.
+  - We need a delay between the SET ADDRESS request until the new address
+    becomes active. This delay was handled in usbPoll() until now. Since the
+    spec says that the delay must not exceed 2ms, previous versions required
+    aggressive polling during the enumeration phase. We have now moved the
+    handling of the delay into the interrupt routine.
+  - We must not reply with NAK to a SETUP transaction. We can only achieve this
+    by making sure that the rx buffer is empty when SETUP tokens are expected.
+    We therefore don't pass zero sized data packets from the status phase of
+    a transfer to usbPoll(). This change MAY cause troubles if you rely on
+    receiving a less than 8 bytes long packet in usbFunctionWrite() to
+    identify the end of a transfer. usbFunctionWrite() will NEVER be called
+    with a zero length.
+* Release 2006-03-14
+  - Improved IAR C support: tiny memory model, more devices
+  - Added template usbconfig.h file under the name usbconfig-prototype.h
+* Release 2006-03-26
+  - Added provision for one more interrupt-in endpoint (endpoint 3).
+  - Added provision for one interrupt-out endpoint (endpoint 1).
+  - Added flowcontrol macros for USB.
+  - Added provision for custom configuration descriptor.
+  - Allow ANY two port bits for D+ and D-.
+  - Merged (optional) receive endpoint number into global usbRxToken variable.
+  - Use USB_CFG_IOPORTNAME instead of USB_CFG_IOPORT. We now construct the
+    variable name from the single port letter instead of computing the address
+    of related ports from the output-port address.
+* Release 2006-06-26
+  - Updated documentation in usbdrv.h and usbconfig-prototype.h to reflect the
+    new features.
+  - Removed "#warning" directives because IAR does not understand them. Use
+    unused static variables instead to generate a warning.
+  - Do not include <avr/io.h> when compiling with IAR.
+  - Introduced USB_CFG_DESCR_PROPS_* in usbconfig.h to configure how each
+    USB descriptor should be handled. It is now possible to provide descriptor
+    data in Flash, RAM or dynamically at runtime.
+  - STALL is now a status in usbTxLen* instead of a message. We can now conform
+    to the spec and leave the stall status pending until it is cleared.
+  - Made usbTxPacketCnt1 and usbTxPacketCnt3 public. This allows the
+    application code to reset data toggling on interrupt pipes.
+* Release 2006-07-18
+  - Added an #if !defined __ASSEMBLER__ to the warning in usbdrv.h. This fixes
+    an assembler error.
+  - usbDeviceDisconnect() takes pull-up resistor to high impedance now.
+* Release 2007-02-01
+  - Merged in some code size improvements from usbtiny (thanks to Dick
+    Streefland for these optimizations!)
+  - Special alignment requirement for usbRxBuf not required any more. Thanks
+    again to Dick Streefland for this hint!
+  - Reverted to "#warning" instead of unused static variables -- new versions
+    of IAR CC should handle this directive.
+  - Changed Open Source license to GNU GPL v2 in order to make linking against
+    other free libraries easier. We no longer require publication of the
+    circuit diagrams, but we STRONGLY encourage it. If you improve the driver
+    itself, PLEASE grant us a royalty free license to your changes for our
+    commercial license.

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/CommercialLicense.txt
 ,0 → 1,155
+AVR-USB Driver Software License Agreement
+Version 2006-07-24
+THIS LICENSE AGREEMENT GRANTS YOU CERTAIN RIGHTS IN A SOFTWARE. YOU CAN
+ENTER INTO THIS AGREEMENT AND ACQUIRE THE RIGHTS OUTLINED BELOW BY PAYING
+THE AMOUNT ACCORDING TO SECTION 4 ("PAYMENT") TO OBJECTIVE DEVELOPMENT.
+DEFINITIONS
+.1 "OBJECTIVE DEVELOPMENT" shall mean OBJECTIVE DEVELOPMENT Software GmbH,
+Grosse Schiffgasse 1A/7, 1020 Wien, AUSTRIA.
+.2 "You" shall mean the Licensee.
+.3 "AVR-USB" shall mean the firmware-only USB device implementation for
+Atmel AVR microcontrollers distributed by OBJECTIVE DEVELOPMENT and
+consisting of the files usbdrv.c, usbdrv.h, usbdrvasm.S, oddebug.c,
+oddebug.h, usbdrvasm.asm, iarcompat.h and usbconfig-prototype.h.
+LICENSE GRANTS
+.1 Source Code. OBJECTIVE DEVELOPMENT shall furnish you with the source
+code of AVR-USB.
+.2 Distribution and Use. OBJECTIVE DEVELOPMENT grants you the
+non-exclusive right to use and distribute AVR-USB with your hardware
+product(s), restricted by the limitations in section 3 below.
+.3 Modifications. OBJECTIVE DEVELOPMENT grants you the right to modify
+your copy of AVR-USB according to your needs.
+.4 USB IDs. OBJECTIVE DEVELOPMENT grants you the exclusive rights to use
+USB Product ID(s) sent to you in e-mail after receiving your payment in
+conjunction with USB Vendor ID 5824. OBJECTIVE DEVELOPMENT has acquired an
+exclusive license for this pair of USB identifiers from Wouter van Ooijen
+(www.voti.nl), who has licensed the VID from the USB Implementers Forum,
+Inc. (www.usb.org).
+LICENSE RESTRICTIONS
+.1 Number of Units. Only one of the following three definitions is
+applicable. Which one is determined by the amount you pay to OBJECTIVE
+DEVELOPMENT, see section 4 ("Payment") below.
+Hobby License: You may use AVR-USB according to section 2 above in no more
+than 5 hardware units. These units must not be sold for profit.
+Entry Level License: You may use AVR-USB according to section 2 above in no
+more than 150 hardware units.
+Professional License: You may use AVR-USB according to section 2 above in
+any number of hardware units, except for large scale production ("unlimited
+fair use"). Quantities below 10,000 units are not considered large scale
+production. If your reach quantities which are obviously large scale
+production, you must pay a license fee of 0.10 EUR per unit for all units
+above 10,000.
+.2 Rental. You may not rent, lease, or lend AVR-USB or otherwise encumber
+any copy of AVR-USB, or any of the rights granted herein.
+.3 Transfer. You may not transfer your rights under this Agreement to
+another party without OBJECTIVE DEVELOPMENT's prior written consent. If
+such consent is obtained, you may permanently transfer this License to
+another party. The recipient of such transfer must agree to all terms and
+conditions of this Agreement.
+.4 Reservation of Rights. OBJECTIVE DEVELOPMENT retains all rights not
+expressly granted.
+.5 Non-Exclusive Rights. Your license rights under this Agreement are
+non-exclusive.
+.6 Third Party Rights. This Agreement cannot grant you rights controlled
+by third parties. In particular, you are not allowed to use the USB logo or
+other trademarks owned by the USB Implementers Forum, Inc. without their
+consent. Since such consent depends on USB certification, it should be
+noted that AVR-USB will not pass certification because it does not
+implement checksum verification and the microcontroller ports do not meet
+the electrical specifications.
+PAYMENT
+The payment amount depends on the variation of this agreement (according to
+section 3.1) into which you want to enter. Concrete prices are listed on
+OBJECTIVE DEVELOPMENT's web site, usually at
+http://www.obdev.at/avrusb/license.html. You agree to pay the amount listed
+there to OBJECTIVE DEVELOPMENT or OBJECTIVE DEVELOPMENT's payment processor
+or reseller.
+COPYRIGHT AND OWNERSHIP
+AVR-USB is protected by copyright laws and international copyright
+treaties, as well as other intellectual property laws and treaties. AVR-USB
+is licensed, not sold.
+TERM AND TERMINATION
+.1 Term. This Agreement shall continue indefinitely. However, OBJECTIVE
+DEVELOPMENT may terminate this Agreement and revoke the granted license and
+USB-IDs if you fail to comply with any of its terms and conditions.
+.2 Survival of Terms. All provisions regarding secrecy, confidentiality
+and limitation of liability shall survive termination of this agreement.
+DISCLAIMER OF WARRANTY AND LIABILITY
+LIMITED WARRANTY. AVR-USB IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+KIND. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, OBJECTIVE
+DEVELOPMENT AND ITS SUPPLIERS HEREBY DISCLAIM ALL WARRANTIES, EITHER
+EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND
+NON-INFRINGEMENT, WITH REGARD TO AVR-USB, AND THE PROVISION OF OR FAILURE
+TO PROVIDE SUPPORT SERVICES. THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL
+RIGHTS. YOU MAY HAVE OTHERS, WHICH VARY FROM STATE/JURISDICTION TO
+STATE/JURISDICTION.
+LIMITATION OF LIABILITY. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW,
+IN NO EVENT SHALL OBJECTIVE DEVELOPMENT OR ITS SUPPLIERS BE LIABLE FOR ANY
+SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER
+(INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS,
+BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR ANY OTHER PECUNIARY
+LOSS) ARISING OUT OF THE USE OF OR INABILITY TO USE AVR-USB OR THE
+PROVISION OF OR FAILURE TO PROVIDE SUPPORT SERVICES, EVEN IF OBJECTIVE
+DEVELOPMENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN ANY
+CASE, OBJECTIVE DEVELOPMENT'S ENTIRE LIABILITY UNDER ANY PROVISION OF THIS
+AGREEMENT SHALL BE LIMITED TO THE AMOUNT ACTUALLY PAID BY YOU FOR AVR-USB.
+MISCELLANEOUS TERMS
+.1 Marketing. OBJECTIVE DEVELOPMENT has the right to mention for marketing
+purposes that you entered into this agreement.
+.2 Entire Agreement. This document represents the entire agreement between
+OBJECTIVE DEVELOPMENT and you. It may only be modified in writing signed by
+an authorized representative of both, OBJECTIVE DEVELOPMENT and you.
+.3 Severability. In case a provision of these terms and conditions should
+be or become partly or entirely invalid, ineffective, or not executable,
+the validity of all other provisions shall not be affected.
+.4 Applicable Law. This agreement is governed by the laws of the Republic
+of Austria.
+.5 Responsible Courts. The responsible courts in Vienna/Austria will have
+exclusive jurisdiction regarding all disputes in connection with this
+agreement.

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/License.txt
 ,0 → 1,359
+OBJECTIVE DEVELOPMENT GmbH's AVR-USB driver software is distributed under the
+terms and conditions of the GNU GPL version 2, see the text below. In addition
+to the requirements in the GPL, we STRONGLY ENCOURAGE you to do the following:
+(1) Publish your entire project on a web site and drop us a note with the URL.
+Use the form at http://www.obdev.at/avrusb/feedback.html for your submission.
+(2) Adhere to minimum publication standards. Please include AT LEAST:
+    - a circuit diagram in PDF, PNG or GIF format
+    - full source code for the host software
+    - a Readme.txt file in ASCII format which describes the purpose of the
+      project and what can be found in which directories and which files
+    - a reference to http://www.obdev.at/avrusb/
+(3) If you improve the driver firmware itself, please give us a free license
+to your modifications for our commercial license offerings.
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+                            Preamble
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
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+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
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+that is to say, a work containing the Program or a portion of it,
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+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
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+along with the Program.
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
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+. You may not copy, modify, sublicense, or distribute the Program
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+This section is intended to make thoroughly clear what is believed to
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+. If the distribution and/or use of the Program is restricted in
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+. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
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+. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
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+                     END OF TERMS AND CONDITIONS
+            How to Apply These Terms to Your New Programs
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
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+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
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+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/Readme.txt
 ,0 → 1,84
+This is the Readme file to Objective Development's firmware-only USB driver
+for Atmel AVR microcontrollers. For more information please visit
+http://www.obdev.at/avrusb/
+This directory contains the USB firmware only. Copy it as-is to your own
+project and add your own version of "usbconfig.h". A template for your own
+"usbconfig.h" can be found in "usbconfig-prototype.h" in this directory.
+TECHNICAL DOCUMENTATION
+=======================
+The technical documentation for the firmware driver is contained in the file
+"usbdrv.h". Please read all of it carefully!
+USB IDENTIFIERS
+===============
+Every USB device needs a vendor- and a product-identifier (VID and PID). VIDs
+are obtained from usb.org for a price of 1,500 USD. Once you have a VID, you
+can assign PIDs at will.
+Since an entry level cost of 1,500 USD is too high for most small companies
+and hobbyists, we provide a single VID/PID pair for free. If you want to use
+your own VID and PID instead of our's, define the macros "USB_CFG_VENDOR_ID"
+and "USB_CFG_DEVICE_ID" accordingly in "usbconfig.h".
+To use our predefined VID/PID pair, you MUST conform to a couple of
+requirements. See the file "USBID-License.txt" for details.
+Objective Development also has some offerings which include product IDs. See
+http://www.obdev.at/avrusb/ for details.
+HOST DRIVER
+===========
+You have received this driver together with an example device implementation
+and an example host driver. The host driver is based on libusb and compiles
+on various Unix flavors (Linux, BSD, Mac OS X). It also compiles natively on
+Windows using MinGW (see www.mingw.org) and libusb-win32 (see
+libusb-win32.sourceforge.net). The "Automator" project contains a native
+Windows host driver (not based on libusb) for Human Interface Devices.
+DEVELOPMENT SYSTEM
+==================
+This driver has been developed and optimized for the GNU compiler version 3
+(gcc 3). It does work well with gcc 4 and future versions will probably be
+optimized for gcc 4. We recommend that you use the GNU compiler suite because
+it is freely available. AVR-USB has also been ported to the IAR compiler and
+assembler. It has been tested with IAR 4.10B/W32 and 4.12A/W32 on an ATmega8
+with the "small" and "tiny" memory model. Please note that gcc is more
+efficient for usbdrv.c because this module has been deliberately optimized
+for gcc.
+USING AVR-USB FOR FREE
+======================
+The AVR firmware driver is published under the GNU General Public License
+Version 2 (GPL2). See the file "License.txt" for details.
+If you decide for the free GPL2, we STRONGLY ENCOURAGE you to do the following
+things IN ADDITION to the obligations from the GPL2:
+(1) Publish your entire project on a web site and drop us a note with the URL.
+Use the form at http://www.obdev.at/avrusb/feedback.html for your submission.
+(2) Adhere to minimum publication standards. Please include AT LEAST:
+    - a circuit diagram in PDF, PNG or GIF format
+    - full source code for the host software
+    - a Readme.txt file in ASCII format which describes the purpose of the
+      project and what can be found in which directories and which files
+    - a reference to http://www.obdev.at/avrusb/
+(3) If you improve the driver firmware itself, please give us a free license
+to your modifications for our commercial license offerings.
+COMMERCIAL LICENSES FOR AVR-USB
+===============================
+If you don't want to publish your source code under the terms of the GPL2,
+you can simply pay money for AVR-USB. As an additional benefit you get
+USB PIDs for free, licensed exclusively to you. See the file
+"CommercialLicense.txt" for details.

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/USBID-License.txt
 ,0 → 1,143
+Royalty-Free Non-Exclusive License USB Product-ID
+=================================================
+Version 2006-06-19
+OBJECTIVE DEVELOPMENT Software GmbH hereby grants you the non-exclusive
+right to use three USB.org vendor-ID (VID) / product-ID (PID) pairs with
+products based on Objective Development's firmware-only USB driver for
+Atmel AVR microcontrollers:
+ * VID = 5824 (=0x16c0) / PID = 1500 (=0x5dc) for devices implementing no
+   USB device class (vendor-class devices with USB class = 0xff). Devices
+   using this pair will be referred to as "VENDOR CLASS" devices.
+ * VID = 5824 (=0x16c0) / PID = 1503 (=0x5df) for HID class devices
+   (excluding mice and keyboards). Devices using this pair will be referred
+   to as "HID CLASS" devices.
+ * VID = 5824 (=0x16c0) / PID = 1505 (=0x5e1) for CDC class modem devices
+   Devices using this pair will be referred to as "CDC-ACM CLASS" devices.
+Since the granted right is non-exclusive, the same VID/PID pairs may be
+used by many companies and individuals for different products. To avoid
+conflicts, your device and host driver software MUST adhere to the rules
+outlined below.
+OBJECTIVE DEVELOPMENT Software GmbH has licensed these VID/PID pairs from
+Wouter van Ooijen (see www.voti.nl), who has licensed the VID from the USB
+Implementers Forum, Inc. (see www.usb.org). The VID is registered for the
+company name "Van Ooijen Technische Informatica".
+RULES AND RESTRICTIONS
+======================
+(1) The USB device MUST provide a textual representation of the
+manufacturer and product identification. The manufacturer identification
+MUST be available at least in USB language 0x0409 (English/US).
+(2) The textual manufacturer identification MUST contain either an Internet
+domain name (e.g. "mycompany.com") registered and owned by you, or an
+e-mail address under your control (e.g. "myname@gmx.net"). You can embed
+the domain name or e-mail address in any string you like, e.g.  "Objective
+Development http://www.obdev.at/avrusb/".
+(3) You are responsible for retaining ownership of the domain or e-mail
+address for as long as any of your products are in use.
+(4) You may choose any string for the textual product identification, as
+long as this string is unique within the scope of your textual manufacturer
+identification.
+(5) Matching of device-specific drivers MUST be based on the textual
+manufacturer and product identification in addition to the usual VID/PID
+matching. This means that operating system features which are based on
+VID/PID matching only (e.g. Windows kernel level drivers, automatic actions
+when the device is plugged in etc) MUST NOT be used. The driver matching
+MUST be a comparison of the entire strings, NOT a sub-string match. For
+CDC-ACM CLASS devices, a generic class driver should be used and the
+matching is based on the USB device class.
+(6) The extent to which VID/PID matching is allowed for non device-specific
+drivers or features depends on the operating system and particular VID/PID
+pair used:
+ * Mac OS X, Linux, FreeBSD and other Unixes: No VID/PID matching is
+   required and hence no VID/PID-only matching is allowed at all.
+ * Windows: The operating system performs VID/PID matching for the kernel
+   level driver. You are REQUIRED to use libusb-win32 (see
+   http://libusb-win32.sourceforge.net/) as the kernel level driver for
+   VENDOR CLASS devices. HID CLASS devices all use the generic HID class
+   driver shipped with Windows, except mice and keyboards. You therefore
+   MUST NOT use any of the shared VID/PID pairs for mice or keyboards.
+   CDC-ACM CLASS devices require a ".inf" file which matches on the VID/PID
+   pair. This ".inf" file MUST load the "usbser" driver to configure the
+   device as modem (COM-port).
+(7) OBJECTIVE DEVELOPMENT Software GmbH disclaims all liability for any
+problems which are caused by the shared use of these VID/PID pairs. You
+have been warned that the sharing of VID/PID pairs may cause problems. If
+you want to avoid them, get your own VID/PID pair for exclusive use.
+HOW TO IMPLEMENT THESE RULES
+============================
+The following rules are for VENDOR CLASS and HID CLASS devices. CDC-ACM
+CLASS devices use the operating system's class driver and don't need a
+custom driver.
+The host driver MUST iterate over all devices with the given VID/PID
+numbers in their device descriptors and query the string representation for
+the manufacturer name in USB language 0x0409 (English/US). It MUST compare
+the ENTIRE string with your textual manufacturer identification chosen in
+(2) above. A substring search for your domain or e-mail address is NOT
+acceptable. The driver MUST NOT touch the device (other than querying the
+descriptors) unless the strings match.
+For all USB devices with matching VID/PID and textual manufacturer
+identification, the host driver must query the textual product
+identification and string-compare it with the name of the product it can
+control. It may only initialize the device if the product matches exactly.
+Objective Development provides examples for these matching rules with the
+"PowerSwitch" project (using libusb) and with the "Automator" project
+(using Windows calls on Windows and libusb on Unix).
+Technical Notes:
+================
+Sharing the same VID/PID pair among devices is possible as long as ALL
+drivers which match the VID/PID also perform matching on the textual
+identification strings. This is easy on all operating systems except
+Windows, since Windows establishes a static connection between the VID/PID
+pair and a kernel level driver. All devices with the same VID/PID pair must
+therefore use THE SAME kernel level driver.
+We therefore demand that you use libusb-win32 for VENDOR CLASS devices.
+This is a generic kernel level driver which allows all types of USB access
+for user space applications. This is only a partial solution of the
+problem, though, because different device drivers may come with different
+versions of libusb-win32 and they may not work with the libusb version of
+the respective other driver. You are therefore encouraged to test your
+driver against a broad range of libusb-win32 versions. Do not use new
+features in new versions, or check for their existence before you use them.
+When a new libusb-win32 becomes available, make sure that your driver is
+compatible with it.
+For HID CLASS devices it is necessary that all those devices bind to the
+same kernel driver: Microsoft's generic USB HID driver. This is true for
+all HID devices except those with a specialized driver. Currently, the only
+HIDs with specialized drivers are mice and keyboards. You therefore MUST
+NOT use a shared VID/PID with mouse and keyboard devices.
+Sharing the same VID/PID among different products is unusual and probably
+violates the USB specification. If you do it, you do it at your own risk.
+To avoid possible incompatibilities, we highly recommend that you get your
+own VID/PID pair if you intend to sell your product. Objective
+Development's commercial licenses for AVR-USB include a PID for
+unrestricted exclusive use.

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/iarcompat.h
 ,0 → 1,70
+/* Name: iarcompat.h
+ * Project: AVR USB driver
+ * Author: Christian Starkjohann
+ * Creation Date: 2006-03-01
+ * Tabsize: 4
+ * Copyright: (c) 2006 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
+ * This Revision: $Id: iarcompat.h,v 1.2 2007/05/19 12:30:11 harbaum Exp $
+ */
+/*
+General Description:
+This header is included when we compile with the IAR C-compiler and assembler.
+It defines macros for cross compatibility between gcc and IAR-cc.
+Thanks to Oleg Semyonov for his help with the IAR tools port!
+*/
+#ifndef __iarcompat_h_INCLUDED__
+#define __iarcompat_h_INCLUDED__
+#if defined __IAR_SYSTEMS_ICC__ || defined __IAR_SYSTEMS_ASM__
+/* Enable bit definitions */
+#ifndef ENABLE_BIT_DEFINITIONS
+#   define ENABLE_BIT_DEFINITIONS       1
+#endif
+/* Include IAR headers */
+#include <ioavr.h>
+#ifndef __IAR_SYSTEMS_ASM__
+#   include <inavr.h>
+#endif
+#define __attribute__(arg)
+#define IAR_SECTION(section)    @ section
+#ifndef USB_BUFFER_SECTION
+#   define  USB_BUFFER_SECTION  "TINY_Z"    /* if user has not selected a named section */
+#endif
+#ifdef __IAR_SYSTEMS_ASM__
+#   define __ASSEMBLER__
+#endif
+#ifdef __HAS_ELPM__
+#   define PROGMEM __farflash
+#else
+#   define PROGMEM __flash
+#endif
+#define PRG_RDB(addr)   (*(PROGMEM char *)(addr))
+/* The following definitions are not needed by the driver, but may be of some
+ * help if you port a gcc based project to IAR.
+ */
+#define cli()       __disable_interrupt()
+#define sei()       __enable_interrupt()
+#define wdt_reset() __watchdog_reset()
+/* Depending on the device you use, you may get problems with the way usbdrv.h
+ * handles the differences between devices. Since IAR does not use #defines
+ * for MCU registers, we can't check for the existence of a particular
+ * register with an #ifdef. If the autodetection mechanism fails, include
+ * definitions for the required USB_INTR_* macros in your usbconfig.h. See
+ * usbconfig-prototype.h and usbdrv.h for details.
+ */
+#endif  /* defined __IAR_SYSTEMS_ICC__ || defined __IAR_SYSTEMS_ASM__ */
+#endif  /* __iarcompat_h_INCLUDED__ */

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/oddebug.c
 ,0 → 1,50
+/* Name: oddebug.c
+ * Project: AVR library
+ * Author: Christian Starkjohann
+ * Creation Date: 2005-01-16
+ * Tabsize: 4
+ * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
+ * This Revision: $Id: oddebug.c,v 1.2 2007/05/19 12:30:11 harbaum Exp $
+ */
+#include "oddebug.h"
+#if DEBUG_LEVEL > 0
+#warning "Never compile production devices with debugging enabled"
+static void uartPutc(char c)
+{
+    while(!(ODDBG_USR & (1 << ODDBG_UDRE)));    /* wait for data register empty */
+    ODDBG_UDR = c;
+}
+static uchar    hexAscii(uchar h)
+{
+    h &= 0xf;
+    if(h >= 10)
+        h += 'a' - (uchar)10 - '0';
+    h += '0';
+    return h;
+}
+static void printHex(uchar c)
+{
+    uartPutc(hexAscii(c >> 4));
+    uartPutc(hexAscii(c));
+}
+void    odDebug(uchar prefix, uchar *data, uchar len)
+{
+    printHex(prefix);
+    uartPutc(':');
+    while(len--){
+        uartPutc(' ');
+        printHex(*data++);
+    }
+    uartPutc('\r');
+    uartPutc('\n');
+}
+#endif

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/oddebug.h
 ,0 → 1,126
+/* Name: oddebug.h
+ * Project: AVR library
+ * Author: Christian Starkjohann
+ * Creation Date: 2005-01-16
+ * Tabsize: 4
+ * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
+ * This Revision: $Id: oddebug.h,v 1.2 2007/05/19 12:30:11 harbaum Exp $
+ */
+#ifndef __oddebug_h_included__
+#define __oddebug_h_included__
+/*
+General Description:
+This module implements a function for debug logs on the serial line of the
+AVR microcontroller. Debugging can be configured with the define
+'DEBUG_LEVEL'. If this macro is not defined or defined to 0, all debugging
+calls are no-ops. If it is 1, DBG1 logs will appear, but not DBG2. If it is
+, DBG1 and DBG2 logs will be printed.
+A debug log consists of a label ('prefix') to indicate which debug log created
+the output and a memory block to dump in hex ('data' and 'len').
+*/
+#ifndef F_CPU
+#   define  F_CPU   12000000    /* 12 MHz */
+#endif
+/* make sure we have the UART defines: */
+#include "iarcompat.h"
+#ifndef __IAR_SYSTEMS_ICC__
+#   include <avr/io.h>
+#endif
+#ifndef uchar
+#   define  uchar   unsigned char
+#endif
+#if DEBUG_LEVEL > 0 && !(defined TXEN || defined TXEN0) /* no UART in device */
+#   warning "Debugging disabled because device has no UART"
+#   undef   DEBUG_LEVEL
+#endif
+#ifndef DEBUG_LEVEL
+#   define  DEBUG_LEVEL 0
+#endif
+/* ------------------------------------------------------------------------- */
+#if DEBUG_LEVEL > 0
+#   define  DBG1(prefix, data, len) odDebug(prefix, data, len)
+#else
+#   define  DBG1(prefix, data, len)
+#endif
+#if DEBUG_LEVEL > 1
+#   define  DBG2(prefix, data, len) odDebug(prefix, data, len)
+#else
+#   define  DBG2(prefix, data, len)
+#endif
+/* ------------------------------------------------------------------------- */
+#if DEBUG_LEVEL > 0
+extern void odDebug(uchar prefix, uchar *data, uchar len);
+/* Try to find our control registers; ATMEL likes to rename these */
+#if defined UBRR
+#   define  ODDBG_UBRR  UBRR
+#elif defined UBRRL
+#   define  ODDBG_UBRR  UBRRL
+#elif defined UBRR0
+#   define  ODDBG_UBRR  UBRR0
+#elif defined UBRR0L
+#   define  ODDBG_UBRR  UBRR0L
+#endif
+#if defined UCR
+#   define  ODDBG_UCR   UCR
+#elif defined UCSRB
+#   define  ODDBG_UCR   UCSRB
+#elif defined UCSR0B
+#   define  ODDBG_UCR   UCSR0B
+#endif
+#if defined TXEN
+#   define  ODDBG_TXEN  TXEN
+#else
+#   define  ODDBG_TXEN  TXEN0
+#endif
+#if defined USR
+#   define  ODDBG_USR   USR
+#elif defined UCSRA
+#   define  ODDBG_USR   UCSRA
+#elif defined UCSR0A
+#   define  ODDBG_USR   UCSR0A
+#endif
+#if defined UDRE
+#   define  ODDBG_UDRE  UDRE
+#else
+#   define  ODDBG_UDRE  UDRE0
+#endif
+#if defined UDR
+#   define  ODDBG_UDR   UDR
+#elif defined UDR0
+#   define  ODDBG_UDR   UDR0
+#endif
+static inline void  odDebugInit(void)
+{
+    ODDBG_UCR |= (1<<ODDBG_TXEN);
+    ODDBG_UBRR = F_CPU / (19200 * 16L) - 1;
+}
+#else
+#   define odDebugInit()
+#endif
+/* ------------------------------------------------------------------------- */
+#endif /* __oddebug_h_included__ */

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/usbconfig-prototype.h
 ,0 → 1,246
+/* Name: usbconfig.h
+ * Project: AVR USB driver
+ * Author: Christian Starkjohann
+ * Creation Date: 2005-04-01
+ * Tabsize: 4
+ * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
+ * This Revision: $Id: usbconfig-prototype.h 275 2007-03-20 09:58:28Z cs $
+ */
+#ifndef __usbconfig_h_included__
+#define __usbconfig_h_included__
+/*
+General Description:
+This file is an example configuration (with inline documentation) for the USB
+driver. It configures AVR-USB for an ATMega8 with USB D+ connected to Port D
+bit 2 (which is also hardware interrupt 0) and USB D- to Port D bit 0. You may
+wire the lines to any other port, as long as D+ is also wired to INT0.
+To create your own usbconfig.h file, copy this file to the directory
+containing "usbdrv" (that is your project firmware source directory) and
+rename it to "usbconfig.h". Then edit it accordingly.
+*/
+/* ---------------------------- Hardware Config ---------------------------- */
+#define USB_CFG_IOPORTNAME      D
+/* This is the port where the USB bus is connected. When you configure it to
+ * "B", the registers PORTB, PINB and DDRB will be used.
+ */
+#define USB_CFG_DMINUS_BIT      0
+/* This is the bit number in USB_CFG_IOPORT where the USB D- line is connected.
+ * This may be any bit in the port.
+ */
+#define USB_CFG_DPLUS_BIT       2
+/* This is the bit number in USB_CFG_IOPORT where the USB D+ line is connected.
+ * This may be any bit in the port. Please note that D+ must also be connected
+ * to interrupt pin INT0!
+ */
+/* ----------------------- Optional Hardware Config ------------------------ */
+/* #define USB_CFG_PULLUP_IOPORTNAME   D */
+/* If you connect the 1.5k pullup resistor from D- to a port pin instead of
+ * V+, you can connect and disconnect the device from firmware by calling
+ * the macros usbDeviceConnect() and usbDeviceDisconnect() (see usbdrv.h).
+ * This constant defines the port on which the pullup resistor is connected.
+ */
+/* #define USB_CFG_PULLUP_BIT          4 */
+/* This constant defines the bit number in USB_CFG_PULLUP_IOPORT (defined
+ * above) where the 1.5k pullup resistor is connected. See description
+ * above for details.
+ */
+/* --------------------------- Functional Range ---------------------------- */
+#define USB_CFG_HAVE_INTRIN_ENDPOINT    1
+/* Define this to 1 if you want to compile a version with two endpoints: The
+ * default control endpoint 0 and an interrupt-in endpoint 1.
+ */
+#define USB_CFG_HAVE_INTRIN_ENDPOINT3   0
+/* Define this to 1 if you want to compile a version with three endpoints: The
+ * default control endpoint 0, an interrupt-in endpoint 1 and an interrupt-in
+ * endpoint 3. You must also enable endpoint 1 above.
+ */
+#define USB_CFG_IMPLEMENT_HALT          0
+/* Define this to 1 if you also want to implement the ENDPOINT_HALT feature
+ * for endpoint 1 (interrupt endpoint). Although you may not need this feature,
+ * it is required by the standard. We have made it a config option because it
+ * bloats the code considerably.
+ */
+#define USB_CFG_INTR_POLL_INTERVAL      20
+/* If you compile a version with endpoint 1 (interrupt-in), this is the poll
+ * interval. The value is in milliseconds and must not be less than 10 ms for
+ * low speed devices.
+ */
+#define USB_CFG_IS_SELF_POWERED         0
+/* Define this to 1 if the device has its own power supply. Set it to 0 if the
+ * device is powered from the USB bus.
+ */
+#define USB_CFG_MAX_BUS_POWER           100
+/* Set this variable to the maximum USB bus power consumption of your device.
+ * The value is in milliamperes. [It will be divided by two since USB
+ * communicates power requirements in units of 2 mA.]
+ */
+#define USB_CFG_IMPLEMENT_FN_WRITE      0
+/* Set this to 1 if you want usbFunctionWrite() to be called for control-out
+ * transfers. Set it to 0 if you don't need it and want to save a couple of
+ * bytes.
+ */
+#define USB_CFG_IMPLEMENT_FN_READ       0
+/* Set this to 1 if you need to send control replies which are generated
+ * "on the fly" when usbFunctionRead() is called. If you only want to send
+ * data from a static buffer, set it to 0 and return the data from
+ * usbFunctionSetup(). This saves a couple of bytes.
+ */
+#define USB_CFG_IMPLEMENT_FN_WRITEOUT   0
+/* Define this to 1 if you want to use interrupt-out (or bulk out) endpoint 1.
+ * You must implement the function usbFunctionWriteOut() which receives all
+ * interrupt/bulk data sent to endpoint 1.
+ */
+#define USB_CFG_HAVE_FLOWCONTROL        0
+/* Define this to 1 if you want flowcontrol over USB data. See the definition
+ * of the macros usbDisableAllRequests() and usbEnableAllRequests() in
+ * usbdrv.h.
+ */
+/* -------------------------- Device Description --------------------------- */
+#define  USB_CFG_VENDOR_ID       0xc0, 0x16
+/* USB vendor ID for the device, low byte first. If you have registered your
+ * own Vendor ID, define it here. Otherwise you use obdev's free shared
+ * VID/PID pair. Be sure to read USBID-License.txt for rules!
+ * This template uses obdev's shared VID/PID pair for HIDs: 0x16c0/0x5df.
+ * Use this VID/PID pair ONLY if you understand the implications!
+ */
+#define  USB_CFG_DEVICE_ID       0xdf, 0x05
+/* This is the ID of the product, low byte first. It is interpreted in the
+ * scope of the vendor ID. If you have registered your own VID with usb.org
+ * or if you have licensed a PID from somebody else, define it here. Otherwise
+ * you use obdev's free shared VID/PID pair. Be sure to read the rules in
+ * USBID-License.txt!
+ * This template uses obdev's shared VID/PID pair for HIDs: 0x16c0/0x5df.
+ * Use this VID/PID pair ONLY if you understand the implications!
+ */
+#define USB_CFG_DEVICE_VERSION  0x00, 0x01
+/* Version number of the device: Minor number first, then major number.
+ */
+#define USB_CFG_VENDOR_NAME     'w', 'w', 'w', '.', 'o', 'b', 'd', 'e', 'v', '.', 'a', 't'
+#define USB_CFG_VENDOR_NAME_LEN 12
+/* These two values define the vendor name returned by the USB device. The name
+ * must be given as a list of characters under single quotes. The characters
+ * are interpreted as Unicode (UTF-16) entities.
+ * If you don't want a vendor name string, undefine these macros.
+ * ALWAYS define a vendor name containing your Internet domain name if you use
+ * obdev's free shared VID/PID pair. See the file USBID-License.txt for
+ * details.
+ */
+#define USB_CFG_DEVICE_NAME     'T', 'e', 'm', 'p', 'l', 'a', 't', 'e'
+#define USB_CFG_DEVICE_NAME_LEN 8
+/* Same as above for the device name. If you don't want a device name, undefine
+ * the macros. See the file USBID-License.txt before you assign a name if you
+ * use a shared VID/PID.
+ */
+/*#define USB_CFG_SERIAL_NUMBER   'N', 'o', 'n', 'e' */
+/*#define USB_CFG_SERIAL_NUMBER_LEN   0 */
+/* Same as above for the serial number. If you don't want a serial number,
+ * undefine the macros.
+ * It may be useful to provide the serial number through other means than at
+ * compile time. See the section about descriptor properties below for how
+ * to fine tune control over USB descriptors such as the string descriptor
+ * for the serial number.
+ */
+#define USB_CFG_DEVICE_CLASS        0
+#define USB_CFG_DEVICE_SUBCLASS     0
+/* See USB specification if you want to conform to an existing device class.
+ */
+#define USB_CFG_INTERFACE_CLASS     3   /* HID */
+#define USB_CFG_INTERFACE_SUBCLASS  0
+#define USB_CFG_INTERFACE_PROTOCOL  0
+/* See USB specification if you want to conform to an existing device class or
+ * protocol.
+ * This template defines a HID class device. If you implement a vendor class
+ * device, set USB_CFG_INTERFACE_CLASS to 0 and USB_CFG_DEVICE_CLASS to 0xff.
+ */
+#define USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH    42  /* total length of report descriptor */
+/* Define this to the length of the HID report descriptor, if you implement
+ * an HID device. Otherwise don't define it or define it to 0.
+ * Since this template defines a HID device, it must also specify a HID
+ * report descriptor length. You must add a PROGMEM character array named
+ * "usbHidReportDescriptor" to your code which contains the report descriptor.
+ * Don't forget to keep the array and this define in sync!
+ */
+/* ------------------- Fine Control over USB Descriptors ------------------- */
+/* If you don't want to use the driver's default USB descriptors, you can
+ * provide our own. These can be provided as (1) fixed length static data in
+ * flash memory, (2) fixed length static data in RAM or (3) dynamically at
+ * runtime in the function usbFunctionDescriptor(). See usbdrv.h for more
+ * information about this function.
+ * Descriptor handling is configured through the descriptor's properties. If
+ * no properties are defined or if they are 0, the default descriptor is used.
+ * Possible properties are:
+ *   + USB_PROP_IS_DYNAMIC: The data for the descriptor should be fetched
+ *     at runtime via usbFunctionDescriptor().
+ *   + USB_PROP_IS_RAM: The data returned by usbFunctionDescriptor() or found
+ *     in static memory is in RAM, not in flash memory.
+ *   + USB_PROP_LENGTH(len): If the data is in static memory (RAM or flash),
+ *     the driver must know the descriptor's length. The descriptor itself is
+ *     found at the address of a well known identifier (see below).
+ * List of static descriptor names (must be declared PROGMEM if in flash):
+ *   char usbDescriptorDevice[];
+ *   char usbDescriptorConfiguration[];
+ *   char usbDescriptorHidReport[];
+ *   char usbDescriptorString0[];
+ *   int usbDescriptorStringVendor[];
+ *   int usbDescriptorStringDevice[];
+ *   int usbDescriptorStringSerialNumber[];
+ * Other descriptors can't be provided statically, they must be provided
+ * dynamically at runtime.
+ *
+ * Descriptor properties are or-ed or added together, e.g.:
+ * #define USB_CFG_DESCR_PROPS_DEVICE   (USB_PROP_IS_RAM | USB_PROP_LENGTH(18))
+ *
+ * The following descriptors are defined:
+ *   USB_CFG_DESCR_PROPS_DEVICE
+ *   USB_CFG_DESCR_PROPS_CONFIGURATION
+ *   USB_CFG_DESCR_PROPS_STRINGS
+ *   USB_CFG_DESCR_PROPS_STRING_0
+ *   USB_CFG_DESCR_PROPS_STRING_VENDOR
+ *   USB_CFG_DESCR_PROPS_STRING_PRODUCT
+ *   USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER
+ *   USB_CFG_DESCR_PROPS_HID
+ *   USB_CFG_DESCR_PROPS_HID_REPORT
+ *   USB_CFG_DESCR_PROPS_UNKNOWN (for all descriptors not handled by the driver)
+ *
+ */
+#define USB_CFG_DESCR_PROPS_DEVICE                  0
+#define USB_CFG_DESCR_PROPS_CONFIGURATION           0
+#define USB_CFG_DESCR_PROPS_STRINGS                 0
+#define USB_CFG_DESCR_PROPS_STRING_0                0
+#define USB_CFG_DESCR_PROPS_STRING_VENDOR           0
+#define USB_CFG_DESCR_PROPS_STRING_PRODUCT          0
+#define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER    0
+#define USB_CFG_DESCR_PROPS_HID                     0
+#define USB_CFG_DESCR_PROPS_HID_REPORT              0
+#define USB_CFG_DESCR_PROPS_UNKNOWN                 0
+/* ----------------------- Optional MCU Description ------------------------ */
+/* The following configurations have working defaults in usbdrv.h. You
+ * usually don't need to set them explicitly. Only if you want to run
+ * the driver on a device which is not yet supported or with a compiler
+ * which is not fully supported (such as IAR C) or if you use a differnt
+ * interrupt than INT0, you may have to define some of these.
+ */
+/* #define USB_INTR_CFG            MCUCR */
+/* #define USB_INTR_CFG_SET        ((1 << ISC00) | (1 << ISC01)) */
+/* #define USB_INTR_CFG_CLR        0 */
+/* #define USB_INTR_ENABLE         GIMSK */
+/* #define USB_INTR_ENABLE_BIT     INT0 */
+/* #define USB_INTR_PENDING        GIFR */
+/* #define USB_INTR_PENDING_BIT    INTF0 */
+#endif /* __usbconfig_h_included__ */

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/usbdrv.c
 ,0 → 1,551
+/* Name: usbdrv.c
+ * Project: AVR USB driver
+ * Author: Christian Starkjohann
+ * Creation Date: 2004-12-29
+ * Tabsize: 4
+ * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
+ * This Revision: $Id: usbdrv.c,v 1.3 2007/06/07 13:53:47 harbaum Exp $
+ */
+#include "iarcompat.h"
+#ifndef __IAR_SYSTEMS_ICC__
+#   include <avr/io.h>
+#   include <avr/pgmspace.h>
+#endif
+#include "usbdrv.h"
+#include "oddebug.h"
+/*
+General Description:
+This module implements the C-part of the USB driver. See usbdrv.h for a
+documentation of the entire driver.
+*/
+#ifndef IAR_SECTION
+#define IAR_SECTION(arg)
+#define __no_init
+#endif
+/* The macro IAR_SECTION is a hack to allow IAR-cc compatibility. On gcc, it
+ * is defined to nothing. __no_init is required on IAR.
+ */
+/* ------------------------------------------------------------------------- */
+/* raw USB registers / interface to assembler code: */
+uchar usbRxBuf[2*USB_BUFSIZE];  /* raw RX buffer: PID, 8 bytes data, 2 bytes CRC */
+uchar       usbInputBufOffset;  /* offset in usbRxBuf used for low level receiving */
+uchar       usbDeviceAddr;      /* assigned during enumeration, defaults to 0 */
+uchar       usbNewDeviceAddr;   /* device ID which should be set after status phase */
+uchar       usbConfiguration;   /* currently selected configuration. Administered by driver, but not used */
+volatile schar usbRxLen;        /* = 0; number of bytes in usbRxBuf; 0 means free, -1 for flow control */
+uchar       usbCurrentTok;      /* last token received, if more than 1 rx endpoint: MSb=endpoint */
+uchar       usbRxToken;         /* token for data we received; if more than 1 rx endpoint: MSb=endpoint */
+uchar       usbMsgLen = 0xff;   /* remaining number of bytes, no msg to send if -1 (see usbMsgPtr) */
+volatile uchar usbTxLen = USBPID_NAK;   /* number of bytes to transmit with next IN token or handshake token */
+uchar       usbTxBuf[USB_BUFSIZE];/* data to transmit with next IN, free if usbTxLen contains handshake token */
+#if USB_CFG_HAVE_INTRIN_ENDPOINT
+volatile uchar usbTxLen1 = USBPID_NAK;  /* TX count for endpoint 1 */
+uchar       usbTxBuf1[USB_BUFSIZE];     /* TX data for endpoint 1 */
+#if USB_CFG_HAVE_INTRIN_ENDPOINT3
+volatile uchar usbTxLen3 = USBPID_NAK;  /* TX count for endpoint 1 */
+uchar       usbTxBuf3[USB_BUFSIZE];     /* TX data for endpoint 1 */
+#endif
+#endif
+/* USB status registers / not shared with asm code */
+uchar           *usbMsgPtr;     /* data to transmit next -- ROM or RAM address */
+static uchar    usbMsgFlags;    /* flag values see below */
+#define USB_FLG_TX_PACKET       (1<<0)
+/* Leave free 6 bits after TX_PACKET. This way we can increment usbMsgFlags to toggle TX_PACKET */
+#define USB_FLG_MSGPTR_IS_ROM   (1<<6)
+#define USB_FLG_USE_DEFAULT_RW  (1<<7)
+/*
+optimizing hints:
+- do not post/pre inc/dec integer values in operations
+- assign value of PRG_RDB() to register variables and don't use side effects in arg
+- use narrow scope for variables which should be in X/Y/Z register
+- assign char sized expressions to variables to force 8 bit arithmetics
+*/
+/* ------------------------------------------------------------------------- */
+#if USB_CFG_DESCR_PROPS_STRINGS == 0
+#if USB_CFG_DESCR_PROPS_STRING_0 == 0
+#undef USB_CFG_DESCR_PROPS_STRING_0
+#define USB_CFG_DESCR_PROPS_STRING_0    sizeof(usbDescriptorString0)
+PROGMEM char usbDescriptorString0[] = { /* language descriptor */
+,          /* sizeof(usbDescriptorString0): length of descriptor in bytes */
+,          /* descriptor type */
+x09, 0x04, /* language index (0x0409 = US-English) */
+};
+#endif
+#if USB_CFG_DESCR_PROPS_STRING_VENDOR == 0 && USB_CFG_VENDOR_NAME_LEN
+#undef USB_CFG_DESCR_PROPS_STRING_VENDOR
+#define USB_CFG_DESCR_PROPS_STRING_VENDOR   sizeof(usbDescriptorStringVendor)
+PROGMEM int  usbDescriptorStringVendor[] = {
+    USB_STRING_DESCRIPTOR_HEADER(USB_CFG_VENDOR_NAME_LEN),
+    USB_CFG_VENDOR_NAME
+};
+#endif
+#if USB_CFG_DESCR_PROPS_STRING_DEVICE == 0 && USB_CFG_DEVICE_NAME_LEN
+#undef USB_CFG_DESCR_PROPS_STRING_DEVICE
+#define USB_CFG_DESCR_PROPS_STRING_DEVICE   sizeof(usbDescriptorStringDevice)
+PROGMEM int  usbDescriptorStringDevice[] = {
+    USB_STRING_DESCRIPTOR_HEADER(USB_CFG_DEVICE_NAME_LEN),
+    USB_CFG_DEVICE_NAME
+};
+#endif
+#if USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER == 0 && USB_CFG_SERIAL_NUMBER_LEN
+#undef USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER
+#define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER    sizeof(usbDescriptorStringSerialNumber)
+PROGMEM int usbDescriptorStringSerialNumber[] = {
+    USB_STRING_DESCRIPTOR_HEADER(USB_CFG_SERIAL_NUMBER_LEN),
+    USB_CFG_SERIAL_NUMBER
+};
+#endif
+#endif  /* USB_CFG_DESCR_PROPS_STRINGS == 0 */
+#if USB_CFG_DESCR_PROPS_DEVICE == 0
+#undef USB_CFG_DESCR_PROPS_DEVICE
+#define USB_CFG_DESCR_PROPS_DEVICE  sizeof(usbDescriptorDevice)
+PROGMEM char usbDescriptorDevice[] = {    /* USB device descriptor */
+,         /* sizeof(usbDescriptorDevice): length of descriptor in bytes */
+    USBDESCR_DEVICE,        /* descriptor type */
+x10, 0x01,             /* USB version supported */
+    USB_CFG_DEVICE_CLASS,
+    USB_CFG_DEVICE_SUBCLASS,
+,                      /* protocol */
+,                      /* max packet size */
+    USB_CFG_VENDOR_ID,      /* 2 bytes */
+    USB_CFG_DEVICE_ID,      /* 2 bytes */
+    USB_CFG_DEVICE_VERSION, /* 2 bytes */
+    USB_CFG_DESCR_PROPS_STRING_VENDOR != 0 ? 1 : 0,         /* manufacturer string index */
+    USB_CFG_DESCR_PROPS_STRING_DEVICE != 0 ? 2 : 0,         /* product string index */
+    USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER != 0 ? 3 : 0,  /* serial number string index */
+,          /* number of configurations */
+};
+#endif
+#if USB_CFG_DESCR_PROPS_HID_REPORT != 0 && USB_CFG_DESCR_PROPS_HID == 0
+#undef USB_CFG_DESCR_PROPS_HID
+#define USB_CFG_DESCR_PROPS_HID     9   /* length of HID descriptor in config descriptor below */
+#endif
+#if USB_CFG_DESCR_PROPS_CONFIGURATION == 0
+#undef USB_CFG_DESCR_PROPS_CONFIGURATION
+#define USB_CFG_DESCR_PROPS_CONFIGURATION   sizeof(usbDescriptorConfiguration)
+PROGMEM char usbDescriptorConfiguration[] = {    /* USB configuration descriptor */
+,          /* sizeof(usbDescriptorConfiguration): length of descriptor in bytes */
+    USBDESCR_CONFIG,    /* descriptor type */
++ 7 * USB_CFG_HAVE_INTRIN_ENDPOINT + (USB_CFG_DESCR_PROPS_HID & 0xff), 0,
+                /* total length of data returned (including inlined descriptors) */
+,          /* number of interfaces in this configuration */
+,          /* index of this configuration */
+,          /* configuration name string index */
+#if USB_CFG_IS_SELF_POWERED
+    USBATTR_SELFPOWER,  /* attributes */
+#else
+    USBATTR_BUSPOWER,   /* attributes */
+#endif
+    USB_CFG_MAX_BUS_POWER/2,            /* max USB current in 2mA units */
+/* interface descriptor follows inline: */
+,          /* sizeof(usbDescrInterface): length of descriptor in bytes */
+    USBDESCR_INTERFACE, /* descriptor type */
+,          /* index of this interface */
+,          /* alternate setting for this interface */
+    USB_CFG_HAVE_INTRIN_ENDPOINT,   /* endpoints excl 0: number of endpoint descriptors to follow */
+    USB_CFG_INTERFACE_CLASS,
+    USB_CFG_INTERFACE_SUBCLASS,
+    USB_CFG_INTERFACE_PROTOCOL,
+,          /* string index for interface */
+#if (USB_CFG_DESCR_PROPS_HID & 0xff)    /* HID descriptor */
+,          /* sizeof(usbDescrHID): length of descriptor in bytes */
+    USBDESCR_HID,   /* descriptor type: HID */
+x01, 0x01, /* BCD representation of HID version */
+x00,       /* target country code */
+x01,       /* number of HID Report (or other HID class) Descriptor infos to follow */
+x22,       /* descriptor type: report */
+    USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH, 0,  /* total length of report descriptor */
+#endif
+#if USB_CFG_HAVE_INTRIN_ENDPOINT    /* endpoint descriptor for endpoint 1 */
+,          /* sizeof(usbDescrEndpoint) */
+    USBDESCR_ENDPOINT,  /* descriptor type = endpoint */
+x81,       /* IN endpoint number 1 */
+x03,       /* attrib: Interrupt endpoint */
+, 0,       /* maximum packet size */
+    USB_CFG_INTR_POLL_INTERVAL, /* in ms */
+#endif
+};
+#endif
+/* We don't use prog_int or prog_int16_t for compatibility with various libc
+ * versions. Here's an other compatibility hack:
+ */
+#ifndef PRG_RDB
+#define PRG_RDB(addr)   pgm_read_byte(addr)
+#endif
+typedef union{
+    unsigned    word;
+    uchar       *ptr;
+    uchar       bytes[2];
+}converter_t;
+/* We use this union to do type conversions. This is better optimized than
+ * type casts in gcc 3.4.3 and much better than using bit shifts to build
+ * ints from chars. Byte ordering is not a problem on an 8 bit platform.
+ */
+/* ------------------------------------------------------------------------- */
+#if USB_CFG_HAVE_INTRIN_ENDPOINT
+void    usbSetInterrupt(uchar *data, uchar len)
+{
+uchar       *p, i;
+#if USB_CFG_IMPLEMENT_HALT
+    if(usbTxLen1 == USBPID_STALL)
+        return;
+#endif
+#if 0   /* No runtime checks! Caller is responsible for valid data! */
+    if(len > 8) /* interrupt transfers are limited to 8 bytes */
+        len = 8;
+#endif
+    if(usbTxLen1 & 0x10){   /* packet buffer was empty */
+        usbTxBuf1[0] ^= USBPID_DATA0 ^ USBPID_DATA1;    /* toggle token */
+    }else{
+        usbTxLen1 = USBPID_NAK; /* avoid sending outdated (overwritten) interrupt data */
+    }
+    p = usbTxBuf1 + 1;
+    for(i=len;i--;)
+        *p++ = *data++;
+    usbCrc16Append(&usbTxBuf1[1], len);
+    usbTxLen1 = len + 4;    /* len must be given including sync byte */
+    DBG2(0x21, usbTxBuf1, len + 3);
+}
+#endif
+#if USB_CFG_HAVE_INTRIN_ENDPOINT3
+void    usbSetInterrupt3(uchar *data, uchar len)
+{
+uchar       *p, i;
+    if(usbTxLen3 & 0x10){   /* packet buffer was empty */
+        usbTxBuf3[0] ^= USBPID_DATA0 ^ USBPID_DATA1;    /* toggle token */
+    }else{
+        usbTxLen3 = USBPID_NAK; /* avoid sending outdated (overwritten) interrupt data */
+    }
+    p = usbTxBuf3 + 1;
+    for(i=len;i--;)
+        *p++ = *data++;
+    usbCrc16Append(&usbTxBuf3[1], len);
+    usbTxLen3 = len + 4;    /* len must be given including sync byte */
+    DBG2(0x23, usbTxBuf3, len + 3);
+}
+#endif
+static uchar    usbRead(uchar *data, uchar len)
+{
+#if USB_CFG_IMPLEMENT_FN_READ
+    if(usbMsgFlags & USB_FLG_USE_DEFAULT_RW){
+#endif
+        uchar i = len, *r = usbMsgPtr;
+        if(usbMsgFlags & USB_FLG_MSGPTR_IS_ROM){    /* ROM data */
+            while(i--){
+                uchar c = PRG_RDB(r);    /* assign to char size variable to enforce byte ops */
+                *data++ = c;
+                r++;
+            }
+        }else{                  /* RAM data */
+            while(i--)
+                *data++ = *r++;
+        }
+        usbMsgPtr = r;
+        return len;
+#if USB_CFG_IMPLEMENT_FN_READ
+    }else{
+        if(len != 0)    /* don't bother app with 0 sized reads */
+            return usbFunctionRead(data, len);
+        return 0;
+    }
+#endif
+}
+#define GET_DESCRIPTOR(cfgProp, staticName)         \
+    if(cfgProp){                                    \
+        if((cfgProp) & USB_PROP_IS_RAM)             \
+            flags &= ~USB_FLG_MSGPTR_IS_ROM;        \
+        if((cfgProp) & USB_PROP_IS_DYNAMIC){        \
+            replyLen = usbFunctionDescriptor(rq);   \
+        }else{                                      \
+            replyData = (uchar *)(staticName);      \
+            SET_REPLY_LEN((cfgProp) & 0xff);        \
+        }                                           \
+    }
+/* We use if() instead of #if in the macro above because #if can't be used
+ * in macros and the compiler optimizes constant conditions anyway.
+ */
+/* Don't make this function static to avoid inlining.
+ * The entire function would become too large and exceed the range of
+ * relative jumps.
+ * 2006-02-25: Either gcc 3.4.3 is better than the gcc used when the comment
+ * above was written, or other parts of the code have changed. We now get
+ * better results with an inlined function. Test condition: PowerSwitch code.
+ */
+static void usbProcessRx(uchar *data, uchar len)
+{
+usbRequest_t    *rq = (void *)data;
+uchar           replyLen = 0, flags = USB_FLG_USE_DEFAULT_RW;
+/* We use if() cascades because the compare is done byte-wise while switch()
+ * is int-based. The if() cascades are therefore more efficient.
+ */
+/* usbRxToken can be:
+ * 0x2d 00101101 (USBPID_SETUP for endpoint 0)
+ * 0xe1 11100001 (USBPID_OUT for endpoint 0)
+ * 0xff 11111111 (USBPID_OUT for endpoint 1)
+ */
+    DBG2(0x10 + ((usbRxToken >> 1) & 3), data, len);    /* SETUP0=12; OUT0=10; OUT1=13 */
+#if USB_CFG_IMPLEMENT_FN_WRITEOUT
+    if(usbRxToken == 0xff){
+        usbFunctionWriteOut(data, len);
+        return; /* no reply expected, hence no usbMsgPtr, usbMsgFlags, usbMsgLen set */
+    }
+#endif
+    if(usbRxToken == (uchar)USBPID_SETUP){
+        usbTxLen = USBPID_NAK;  /* abort pending transmit */
+        if(len == 8){   /* Setup size must be always 8 bytes. Ignore otherwise. */
+            uchar type = rq->bmRequestType & USBRQ_TYPE_MASK;
+            if(type == USBRQ_TYPE_STANDARD){
+                #define SET_REPLY_LEN(len)  replyLen = (len); usbMsgPtr = replyData
+                /* This macro ensures that replyLen and usbMsgPtr are always set in the same way.
+                 * That allows optimization of common code in if() branches */
+                uchar *replyData = usbTxBuf + 9; /* there is 3 bytes free space at the end of the buffer */
+                replyData[0] = 0;   /* common to USBRQ_GET_STATUS and USBRQ_GET_INTERFACE */
+                if(rq->bRequest == USBRQ_GET_STATUS){           /* 0 */
+                    uchar __attribute__((__unused__)) recipient = rq->bmRequestType & USBRQ_RCPT_MASK;  /* assign arith ops to variables to enforce byte size */
+#if USB_CFG_IS_SELF_POWERED
+                    if(recipient == USBRQ_RCPT_DEVICE)
+                        replyData[0] =  USB_CFG_IS_SELF_POWERED;
+#endif
+#if USB_CFG_HAVE_INTRIN_ENDPOINT && USB_CFG_IMPLEMENT_HALT
+                    if(recipient == USBRQ_RCPT_ENDPOINT && rq->wIndex.bytes[0] == 0x81)   /* request status for endpoint 1 */
+                        replyData[0] = usbTxLen1 == USBPID_STALL;
+#endif
+                    replyData[1] = 0;
+                    SET_REPLY_LEN(2);
+                }else if(rq->bRequest == USBRQ_SET_ADDRESS){    /* 5 */
+                    usbNewDeviceAddr = rq->wValue.bytes[0];
+                }else if(rq->bRequest == USBRQ_GET_DESCRIPTOR){ /* 6 */
+                    flags = USB_FLG_MSGPTR_IS_ROM | USB_FLG_USE_DEFAULT_RW;
+                    if(rq->wValue.bytes[1] == USBDESCR_DEVICE){ /* 1 */
+                        GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_DEVICE, usbDescriptorDevice)
+                    }else if(rq->wValue.bytes[1] == USBDESCR_CONFIG){   /* 2 */
+                        GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_CONFIGURATION, usbDescriptorConfiguration)
+                    }else if(rq->wValue.bytes[1] == USBDESCR_STRING){   /* 3 */
+#if USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC
+                        if(USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_RAM)
+                            flags &= ~USB_FLG_MSGPTR_IS_ROM;
+                        replyLen = usbFunctionDescriptor(rq);
+#else   /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */
+                        if(rq->wValue.bytes[0] == 0){   /* descriptor index */
+                            GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_0, usbDescriptorString0)
+                        }else if(rq->wValue.bytes[0] == 1){
+                            GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_VENDOR, usbDescriptorStringVendor)
+                        }else if(rq->wValue.bytes[0] == 2){
+                            GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_DEVICE, usbDescriptorStringDevice)
+                        }else if(rq->wValue.bytes[0] == 3){
+                            GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER, usbDescriptorStringSerialNumber)
+                        }else if(USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC){
+                            replyLen = usbFunctionDescriptor(rq);
+                        }
+#endif  /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */
+                    }else if(rq->wValue.bytes[1] == USBDESCR_HID){          /* 0x21 */
+                        GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID, usbDescriptorConfiguration + 18)
+                    }else if(rq->wValue.bytes[1] == USBDESCR_HID_REPORT){   /* 0x22 */
+                        GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID_REPORT, usbDescriptorHidReport)
+                    }else if(USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC){
+                        replyLen = usbFunctionDescriptor(rq);
+                    }
+                }else if(rq->bRequest == USBRQ_GET_CONFIGURATION){  /* 8 */
+                    replyData = &usbConfiguration;  /* send current configuration value */
+                    SET_REPLY_LEN(1);
+                }else if(rq->bRequest == USBRQ_SET_CONFIGURATION){  /* 9 */
+                    usbConfiguration = rq->wValue.bytes[0];
+#if USB_CFG_IMPLEMENT_HALT
+                    usbTxLen1 = USBPID_NAK;
+#endif
+                }else if(rq->bRequest == USBRQ_GET_INTERFACE){      /* 10 */
+                    SET_REPLY_LEN(1);
+#if USB_CFG_HAVE_INTRIN_ENDPOINT
+                }else if(rq->bRequest == USBRQ_SET_INTERFACE){      /* 11 */
+                    USB_SET_DATATOKEN1(USBPID_DATA0);   /* reset data toggling for interrupt endpoint */
+#   if USB_CFG_HAVE_INTRIN_ENDPOINT3
+                    USB_SET_DATATOKEN3(USBPID_DATA0);   /* reset data toggling for interrupt endpoint */
+#   endif
+#   if USB_CFG_IMPLEMENT_HALT
+                    usbTxLen1 = USBPID_NAK;
+                }else if(rq->bRequest == USBRQ_CLEAR_FEATURE || rq->bRequest == USBRQ_SET_FEATURE){   /* 1|3 */
+                    if(rq->wValue.bytes[0] == 0 && rq->wIndex.bytes[0] == 0x81){   /* feature 0 == HALT for endpoint == 1 */
+                        usbTxLen1 = rq->bRequest == USBRQ_CLEAR_FEATURE ? USBPID_NAK : USBPID_STALL;
+                        USB_SET_DATATOKEN1(USBPID_DATA0);   /* reset data toggling for interrupt endpoint */
+#       if USB_CFG_HAVE_INTRIN_ENDPOINT3
+                        USB_SET_DATATOKEN3(USBPID_DATA0);   /* reset data toggling for interrupt endpoint */
+#       endif
+                    }
+#   endif
+#endif
+                }else{
+                    /* the following requests can be ignored, send default reply */
+                    /* 1: CLEAR_FEATURE, 3: SET_FEATURE, 7: SET_DESCRIPTOR */
+                    /* 12: SYNCH_FRAME */
+                }
+                #undef SET_REPLY_LEN
+            }else{  /* not a standard request -- must be vendor or class request */
+                replyLen = usbFunctionSetup(data);
+            }
+#if USB_CFG_IMPLEMENT_FN_READ || USB_CFG_IMPLEMENT_FN_WRITE
+            if(replyLen == 0xff){   /* use user-supplied read/write function */
+                if((rq->bmRequestType & USBRQ_DIR_MASK) == USBRQ_DIR_DEVICE_TO_HOST){
+                    replyLen = rq->wLength.bytes[0];    /* IN transfers only */
+                }
+                flags &= ~USB_FLG_USE_DEFAULT_RW;  /* we have no valid msg, use user supplied read/write functions */
+            }else   /* The 'else' prevents that we limit a replyLen of 0xff to the maximum transfer len. */
+#endif
+            if(!rq->wLength.bytes[1] && replyLen > rq->wLength.bytes[0])  /* limit length to max */
+                replyLen = rq->wLength.bytes[0];
+        }
+        /* make sure that data packets which are sent as ACK to an OUT transfer are always zero sized */
+    }else{  /* DATA packet from out request */
+#if USB_CFG_IMPLEMENT_FN_WRITE
+        if(!(usbMsgFlags & USB_FLG_USE_DEFAULT_RW)){
+            uchar rval = usbFunctionWrite(data, len);
+            replyLen = 0xff;
+            if(rval == 0xff){       /* an error occurred */
+                usbMsgLen = 0xff;   /* cancel potentially pending data packet for ACK */
+                usbTxLen = USBPID_STALL;
+            }else if(rval != 0){    /* This was the final package */
+                replyLen = 0;       /* answer with a zero-sized data packet */
+            }
+            flags = 0;    /* start with a DATA1 package, stay with user supplied write() function */
+        }
+#endif
+    }
+    usbMsgFlags = flags;
+    usbMsgLen = replyLen;
+}
+/* ------------------------------------------------------------------------- */
+static void usbBuildTxBlock(void)
+{
+uchar       wantLen, len, txLen, token;
+    wantLen = usbMsgLen;
+    if(wantLen > 8)
+        wantLen = 8;
+    usbMsgLen -= wantLen;
+    token = USBPID_DATA1;
+    if(usbMsgFlags & USB_FLG_TX_PACKET)
+        token = USBPID_DATA0;
+    usbMsgFlags++;
+    len = usbRead(usbTxBuf + 1, wantLen);
+    if(len <= 8){           /* valid data packet */
+        usbCrc16Append(&usbTxBuf[1], len);
+        txLen = len + 4;    /* length including sync byte */
+        if(len < 8)         /* a partial package identifies end of message */
+            usbMsgLen = 0xff;
+    }else{
+        txLen = USBPID_STALL;   /* stall the endpoint */
+        usbMsgLen = 0xff;
+    }
+    usbTxBuf[0] = token;
+    usbTxLen = txLen;
+    DBG2(0x20, usbTxBuf, txLen-1);
+}
+static inline uchar isNotSE0(void)
+{
+uchar   rval;
+/* We want to do
+ *     return (USBIN & USBMASK);
+ * here, but the compiler does int-expansion acrobatics.
+ * We can avoid this by assigning to a char-sized variable.
+ */
+    rval = USBIN & USBMASK;
+    return rval;
+}
+/* ------------------------------------------------------------------------- */
+void    usbPoll(void)
+{
+uchar   len, i;
+    if((len = usbRxLen) > 0){
+/* We could check CRC16 here -- but ACK has already been sent anyway. If you
+ * need data integrity checks with this driver, check the CRC in your app
+ * code and report errors back to the host. Since the ACK was already sent,
+ * retries must be handled on application level.
+ * unsigned crc = usbCrc16(buffer + 1, usbRxLen - 3);
+ */
+        usbProcessRx(usbRxBuf + USB_BUFSIZE + 1 - usbInputBufOffset, len - 3);
+#if USB_CFG_HAVE_FLOWCONTROL
+        if(usbRxLen > 0)    /* only mark as available if not inactivated */
+            usbRxLen = 0;
+#else
+        usbRxLen = 0;       /* mark rx buffer as available */
+#endif
+    }
+    if(usbTxLen & 0x10){ /* transmit system idle */
+        if(usbMsgLen != 0xff){  /* transmit data pending? */
+            usbBuildTxBlock();
+        }
+    }
+    for(i = 10; i > 0; i--){
+        if(isNotSE0())
+            break;
+    }
+    if(i == 0){ /* RESET condition, called multiple times during reset */
+        usbNewDeviceAddr = 0;
+        usbDeviceAddr = 0;
+#if USB_CFG_IMPLEMENT_HALT
+        usbTxLen1 = USBPID_NAK;
+#if USB_CFG_HAVE_INTRIN_ENDPOINT3
+        usbTxLen3 = USBPID_NAK;
+#endif
+#endif
+        DBG1(0xff, 0, 0);
+    }
+}
+/* ------------------------------------------------------------------------- */
+void    usbInit(void)
+{
+#if USB_INTR_CFG_SET != 0
+    USB_INTR_CFG |= USB_INTR_CFG_SET;
+#endif
+#if USB_INTR_CFG_CLR != 0
+    USB_INTR_CFG &= ~(USB_INTR_CFG_CLR);
+#endif
+    USB_INTR_ENABLE |= (1 << USB_INTR_ENABLE_BIT);
+#if USB_CFG_HAVE_INTRIN_ENDPOINT
+    USB_SET_DATATOKEN1(USBPID_DATA0);   /* reset data toggling for interrupt endpoint */
+#   if USB_CFG_HAVE_INTRIN_ENDPOINT3
+    USB_SET_DATATOKEN3(USBPID_DATA0);   /* reset data toggling for interrupt endpoint */
+#   endif
+#endif
+}
+/* ------------------------------------------------------------------------- */

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/usbdrv.h
 ,0 → 1,633
+/* Name: usbdrv.h
+ * Project: AVR USB driver
+ * Author: Christian Starkjohann
+ * Creation Date: 2004-12-29
+ * Tabsize: 4
+ * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
+ * This Revision: $Id: usbdrv.h,v 1.2 2007/05/19 12:30:11 harbaum Exp $
+ */
+#ifndef __usbdrv_h_included__
+#define __usbdrv_h_included__
+#include "usbconfig.h"
+#include "iarcompat.h"
+/*
+Hardware Prerequisites:
+=======================
+USB lines D+ and D- MUST be wired to the same I/O port. D+ must (also) be
+connected to INT0. D- requires a pullup of 1.5k to +3.5V (and the device
+must be powered at 3.5V) to identify as low-speed USB device. A pullup of
+M SHOULD be connected from D+ to +3.5V to prevent interference when no USB
+master is connected. We use D+ as interrupt source and not D- because it
+does not trigger on keep-alive and RESET states.
+As a compile time option, the 1.5k pullup resistor on D- can be made
+switchable to allow the device to disconnect at will. See the definition of
+usbDeviceConnect() and usbDeviceDisconnect() further down in this file.
+Please adapt the values in usbconfig.h according to your hardware!
+The device MUST be clocked at 12 MHz. This is more than the 10 MHz allowed by
+an AT90S2313 powered at 4.5V. However, if the supply voltage to maximum clock
+relation is interpolated linearly, an ATtiny2313 meets the requirement by
+specification. In practice, the AT90S2313 can be overclocked and works well.
+Limitations:
+============
+Robustness with respect to communication errors:
+The driver assumes error-free communication. It DOES check for errors in
+the PID, but does NOT check bit stuffing errors, SE0 in middle of a byte,
+token CRC (5 bit) and data CRC (16 bit). CRC checks can not be performed due
+to timing constraints: We must start sending a reply within 7 bit times.
+Bit stuffing and misplaced SE0 would have to be checked in real-time, but CPU
+performance does not permit that. The driver does not check Data0/Data1
+toggling, but application software can implement the check.
+Input characteristics:
+Since no differential receiver circuit is used, electrical interference
+robustness may suffer. The driver samples only one of the data lines with
+an ordinary I/O pin's input characteristics. However, since this is only a
+low speed USB implementation and the specification allows for 8 times the
+bit rate over the same hardware, we should be on the safe side. Even the spec
+requires detection of asymmetric states at high bit rate for SE0 detection.
+Number of endpoints:
+The driver supports up to four endpoints: One control endpoint (endpoint 0),
+two interrupt-in (or bulk-in) endpoints (endpoint 1 and 3) and one
+interrupt-out (or bulk-out) endpoint (endpoint 1). Please note that the USB
+standard forbids bulk endpoints for low speed devices! Most operating systems
+allow them anyway, but the AVR will spend 90% of the CPU time in the USB
+interrupt polling for bulk data.
+By default, only the control endpoint 0 is enabled. To get the other endpoints,
+define USB_CFG_HAVE_INTRIN_ENDPOINT, USB_CFG_HAVE_INTRIN_ENDPOINT3 and/or
+USB_CFG_IMPLEMENT_FN_WRITEOUT respectively (see usbconfig-prototype.h for
+details).
+Maximum data payload:
+Data payload of control in and out transfers may be up to 254 bytes. In order
+to accept payload data of out transfers, you need to implement
+'usbFunctionWrite()'.
+USB Suspend Mode supply current:
+The USB standard limits power consumption to 500uA when the bus is in suspend
+mode. This is not a problem for self-powered devices since they don't need
+bus power anyway. Bus-powered devices can achieve this only by putting the
+CPU in sleep mode. The driver does not implement suspend handling by itself.
+However, the application may implement activity monitoring and wakeup from
+sleep. The host sends regular SE0 states on the bus to keep it active. These
+SE0 states can be detected by wiring the INT1 pin to D-. It is not necessary
+to enable the interrupt, checking the interrupt pending flag should suffice.
+Before entering sleep mode, the application should enable INT1 for a wakeup
+on the next bus activity.
+Operation without an USB master:
+The driver behaves neutral without connection to an USB master if D- reads
+as 1. To avoid spurious interrupts, we recommend a high impedance (e.g. 1M)
+pullup resistor on D+. If D- becomes statically 0, the driver may block in
+the interrupt routine.
+Interrupt latency:
+The application must ensure that the USB interrupt is not disabled for more
+than 20 cycles. This implies that all interrupt routines must either be
+declared as "INTERRUPT" instead of "SIGNAL" (see "avr/signal.h") or that they
+are written in assembler with "sei" as the first instruction.
+Maximum interrupt duration / CPU cycle consumption:
+The driver handles all USB communication during the interrupt service
+routine. The routine will not return before an entire USB message is received
+and the reply is sent. This may be up to ca. 1200 cycles = 100us if the host
+conforms to the standard. The driver will consume CPU cycles for all USB
+messages, even if they address another (low-speed) device on the same bus.
+*/
+/* ------------------------------------------------------------------------- */
+/* --------------------------- Module Interface ---------------------------- */
+/* ------------------------------------------------------------------------- */
+#define USBDRV_VERSION  20070319
+/* This define uniquely identifies a driver version. It is a decimal number
+ * constructed from the driver's release date in the form YYYYMMDD. If the
+ * driver's behavior or interface changes, you can use this constant to
+ * distinguish versions. If it is not defined, the driver's release date is
+ * older than 2006-01-25.
+ */
+#ifndef __ASSEMBLER__
+#ifndef uchar
+#define uchar   unsigned char
+#endif
+#ifndef schar
+#define schar   signed char
+#endif
+/* shortcuts for well defined 8 bit integer types */
+struct usbRequest;  /* forward declaration */
+extern void     usbInit(void);
+/* This function must be called before interrupts are enabled and the main
+ * loop is entered.
+ */
+extern void     usbPoll(void);
+/* This function must be called at regular intervals from the main loop.
+ * Maximum delay between calls is somewhat less than 50ms (USB timeout for
+ * accepting a Setup message). Otherwise the device will not be recognized.
+ * Please note that debug outputs through the UART take ~ 0.5ms per byte
+ * at 19200 bps.
+ */
+extern uchar    *usbMsgPtr;
+/* This variable may be used to pass transmit data to the driver from the
+ * implementation of usbFunctionWrite(). It is also used internally by the
+ * driver for standard control requests.
+ */
+extern uchar    usbFunctionSetup(uchar data[8]);
+/* This function is called when the driver receives a SETUP transaction from
+ * the host which is not answered by the driver itself (in practice: class and
+ * vendor requests). All control transfers start with a SETUP transaction where
+ * the host communicates the parameters of the following (optional) data
+ * transfer. The SETUP data is available in the 'data' parameter which can
+ * (and should) be casted to 'usbRequest_t *' for a more user-friendly access
+ * to parameters.
+ *
+ * If the SETUP indicates a control-in transfer, you should provide the
+ * requested data to the driver. There are two ways to transfer this data:
+ * (1) Set the global pointer 'usbMsgPtr' to the base of the static RAM data
+ * block and return the length of the data in 'usbFunctionSetup()'. The driver
+ * will handle the rest. Or (2) return 0xff in 'usbFunctionSetup()'. The driver
+ * will then call 'usbFunctionRead()' when data is needed. See the
+ * documentation for usbFunctionRead() for details.
+ *
+ * If the SETUP indicates a control-out transfer, the only way to receive the
+ * data from the host is through the 'usbFunctionWrite()' call. If you
+ * implement this function, you must return 0xff in 'usbFunctionSetup()' to
+ * indicate that 'usbFunctionWrite()' should be used. See the documentation of
+ * this function for more information. If you just want to ignore the data sent
+ * by the host, return 0 in 'usbFunctionSetup()'.
+ *
+ * Note that calls to the functions usbFunctionRead() and usbFunctionWrite()
+ * are only done if enabled by the configuration in usbconfig.h.
+ */
+extern uchar usbFunctionDescriptor(struct usbRequest *rq);
+/* You need to implement this function ONLY if you provide USB descriptors at
+ * runtime (which is an expert feature). It is very similar to
+ * usbFunctionSetup() above, but it is called only to request USB descriptor
+ * data. See the documentation of usbFunctionSetup() above for more info.
+ */
+#if USB_CFG_HAVE_INTRIN_ENDPOINT
+void    usbSetInterrupt(uchar *data, uchar len);
+/* This function sets the message which will be sent during the next interrupt
+ * IN transfer. The message is copied to an internal buffer and must not exceed
+ * a length of 8 bytes. The message may be 0 bytes long just to indicate the
+ * interrupt status to the host.
+ * If you need to transfer more bytes, use a control read after the interrupt.
+ */
+extern volatile uchar usbTxLen1;
+#define usbInterruptIsReady()   (usbTxLen1 & 0x10)
+/* This macro indicates whether the last interrupt message has already been
+ * sent. If you set a new interrupt message before the old was sent, the
+ * message already buffered will be lost.
+ */
+#if USB_CFG_HAVE_INTRIN_ENDPOINT3
+void    usbSetInterrupt3(uchar *data, uchar len);
+extern volatile uchar usbTxLen3;
+#define usbInterruptIsReady3()   (usbTxLen3 & 0x10)
+/* Same as above for endpoint 3 */
+#endif
+#endif /* USB_CFG_HAVE_INTRIN_ENDPOINT */
+#if USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH    /* simplified interface for backward compatibility */
+#define usbHidReportDescriptor  usbDescriptorHidReport
+/* should be declared as: PROGMEM char usbHidReportDescriptor[]; */
+/* If you implement an HID device, you need to provide a report descriptor.
+ * The HID report descriptor syntax is a bit complex. If you understand how
+ * report descriptors are constructed, we recommend that you use the HID
+ * Descriptor Tool from usb.org, see http://www.usb.org/developers/hidpage/.
+ * Otherwise you should probably start with a working example.
+ */
+#endif  /* USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH */
+#if USB_CFG_IMPLEMENT_FN_WRITE
+extern uchar    usbFunctionWrite(uchar *data, uchar len);
+/* This function is called by the driver to provide a control transfer's
+ * payload data (control-out). It is called in chunks of up to 8 bytes. The
+ * total count provided in the current control transfer can be obtained from
+ * the 'length' property in the setup data. If an error occurred during
+ * processing, return 0xff (== -1). The driver will answer the entire transfer
+ * with a STALL token in this case. If you have received the entire payload
+ * successfully, return 1. If you expect more data, return 0. If you don't
+ * know whether the host will send more data (you should know, the total is
+ * provided in the usbFunctionSetup() call!), return 1.
+ * NOTE: If you return 0xff for STALL, 'usbFunctionWrite()' may still be called
+ * for the remaining data. You must continue to return 0xff for STALL in these
+ * calls.
+ * In order to get usbFunctionWrite() called, define USB_CFG_IMPLEMENT_FN_WRITE
+ * to 1 in usbconfig.h and return 0xff in usbFunctionSetup()..
+ */
+#endif /* USB_CFG_IMPLEMENT_FN_WRITE */
+#if USB_CFG_IMPLEMENT_FN_READ
+extern uchar usbFunctionRead(uchar *data, uchar len);
+/* This function is called by the driver to ask the application for a control
+ * transfer's payload data (control-in). It is called in chunks of up to 8
+ * bytes each. You should copy the data to the location given by 'data' and
+ * return the actual number of bytes copied. If you return less than requested,
+ * the control-in transfer is terminated. If you return 0xff, the driver aborts
+ * the transfer with a STALL token.
+ * In order to get usbFunctionRead() called, define USB_CFG_IMPLEMENT_FN_READ
+ * to 1 in usbconfig.h and return 0xff in usbFunctionSetup()..
+ */
+#endif /* USB_CFG_IMPLEMENT_FN_READ */
+#if USB_CFG_IMPLEMENT_FN_WRITEOUT
+extern void usbFunctionWriteOut(uchar *data, uchar len);
+/* This function is called by the driver when data on interrupt-out or bulk-
+ * out endpoint 1 is received. You must define USB_CFG_IMPLEMENT_FN_WRITEOUT
+ * to 1 in usbconfig.h to get this function called.
+ */
+#endif /* USB_CFG_IMPLEMENT_FN_WRITEOUT */
+#ifdef USB_CFG_PULLUP_IOPORTNAME
+#define usbDeviceConnect()      ((USB_PULLUP_DDR |= (1<<USB_CFG_PULLUP_BIT)), \
+                                  (USB_PULLUP_OUT |= (1<<USB_CFG_PULLUP_BIT)))
+/* This macro (intended to look like a function) connects the device to the
+ * USB bus. It is only available if you have defined the constants
+ * USB_CFG_PULLUP_IOPORT and USB_CFG_PULLUP_BIT in usbconfig.h.
+ */
+#define usbDeviceDisconnect()   ((USB_PULLUP_DDR &= ~(1<<USB_CFG_PULLUP_BIT)), \
+                                  (USB_PULLUP_OUT &= ~(1<<USB_CFG_PULLUP_BIT)))
+/* This macro (intended to look like a function) disconnects the device from
+ * the USB bus. It is only available if you have defined the constants
+ * USB_CFG_PULLUP_IOPORT and USB_CFG_PULLUP_BIT in usbconfig.h.
+ */
+#endif /* USB_CFG_PULLUP_IOPORT */
+extern unsigned usbCrc16(unsigned data, uchar len);
+#define usbCrc16(data, len) usbCrc16((unsigned)(data), len)
+/* This function calculates the binary complement of the data CRC used in
+ * USB data packets. The value is used to build raw transmit packets.
+ * You may want to use this function for data checksums or to verify received
+ * data. We enforce 16 bit calling conventions for compatibility with IAR's
+ * tiny memory model.
+ */
+extern unsigned usbCrc16Append(unsigned data, uchar len);
+#define usbCrc16Append(data, len)    usbCrc16Append((unsigned)(data), len)
+/* This function is equivalent to usbCrc16() above, except that it appends
+ * the 2 bytes CRC (lowbyte first) in the 'data' buffer after reading 'len'
+ * bytes.
+ */
+extern uchar    usbConfiguration;
+/* This value contains the current configuration set by the host. The driver
+ * allows setting and querying of this variable with the USB SET_CONFIGURATION
+ * and GET_CONFIGURATION requests, but does not use it otherwise.
+ * You may want to reflect the "configured" status with a LED on the device or
+ * switch on high power parts of the circuit only if the device is configured.
+ */
+#define USB_STRING_DESCRIPTOR_HEADER(stringLength) ((2*(stringLength)+2) | (3<<8))
+/* This macro builds a descriptor header for a string descriptor given the
+ * string's length. See usbdrv.c for an example how to use it.
+ */
+#if USB_CFG_HAVE_FLOWCONTROL
+extern volatile schar   usbRxLen;
+#define usbDisableAllRequests()     usbRxLen = -1
+/* Must be called from usbFunctionWrite(). This macro disables all data input
+ * from the USB interface. Requests from the host are answered with a NAK
+ * while they are disabled.
+ */
+#define usbEnableAllRequests()      usbRxLen = 0
+/* May only be called if requests are disabled. This macro enables input from
+ * the USB interface after it has been disabled with usbDisableAllRequests().
+ */
+#define usbAllRequestsAreDisabled() (usbRxLen < 0)
+/* Use this macro to find out whether requests are disabled. It may be needed
+ * to ensure that usbEnableAllRequests() is never called when requests are
+ * enabled.
+ */
+#endif
+#define USB_SET_DATATOKEN1(token)   usbTxBuf1[0] = token
+#define USB_SET_DATATOKEN3(token)   usbTxBuf3[0] = token
+/* These two macros can be used by application software to reset data toggling
+ * for interrupt-in endpoints 1 and 3.
+ */
+#endif  /* __ASSEMBLER__ */
+/* ------------------------------------------------------------------------- */
+/* ----------------- Definitions for Descriptor Properties ----------------- */
+/* ------------------------------------------------------------------------- */
+/* This is advanced stuff. See usbconfig-prototype.h for more information
+ * about the various methods to define USB descriptors. If you do nothing,
+ * the default descriptors will be used.
+ */
+#define USB_PROP_IS_DYNAMIC     (1 << 8)
+/* If this property is set for a descriptor, usbFunctionDescriptor() will be
+ * used to obtain the particular descriptor.
+ */
+#define USB_PROP_IS_RAM         (1 << 9)
+/* If this property is set for a descriptor, the data is read from RAM
+ * memory instead of Flash. The property is used for all methods to provide
+ * external descriptors.
+ */
+#define USB_PROP_LENGTH(len)    ((len) & 0xff)
+/* If a static external descriptor is used, this is the total length of the
+ * descriptor in bytes.
+ */
+/* all descriptors which may have properties: */
+#ifndef USB_CFG_DESCR_PROPS_DEVICE
+#define USB_CFG_DESCR_PROPS_DEVICE                  0
+#endif
+#ifndef USB_CFG_DESCR_PROPS_CONFIGURATION
+#define USB_CFG_DESCR_PROPS_CONFIGURATION           0
+#endif
+#ifndef USB_CFG_DESCR_PROPS_STRINGS
+#define USB_CFG_DESCR_PROPS_STRINGS                 0
+#endif
+#ifndef USB_CFG_DESCR_PROPS_STRING_0
+#define USB_CFG_DESCR_PROPS_STRING_0                0
+#endif
+#ifndef USB_CFG_DESCR_PROPS_STRING_VENDOR
+#define USB_CFG_DESCR_PROPS_STRING_VENDOR           0
+#endif
+#ifndef USB_CFG_DESCR_PROPS_STRING_DEVICE
+#define USB_CFG_DESCR_PROPS_STRING_DEVICE           0
+#endif
+#ifndef USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER
+#define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER    0
+#endif
+#ifndef USB_CFG_DESCR_PROPS_HID
+#define USB_CFG_DESCR_PROPS_HID                     0
+#endif
+#if !(USB_CFG_DESCR_PROPS_HID_REPORT)
+#   undef USB_CFG_DESCR_PROPS_HID_REPORT
+#   if USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH /* do some backward compatibility tricks */
+#       define USB_CFG_DESCR_PROPS_HID_REPORT       USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH
+#   else
+#       define USB_CFG_DESCR_PROPS_HID_REPORT       0
+#   endif
+#endif
+#ifndef USB_CFG_DESCR_PROPS_UNKNOWN
+#define USB_CFG_DESCR_PROPS_UNKNOWN                 0
+#endif
+/* ------------------ forward declaration of descriptors ------------------- */
+/* If you use external static descriptors, they must be stored in global
+ * arrays as declared below:
+ */
+#ifndef __ASSEMBLER__
+extern
+#if !(USB_CFG_DESCR_PROPS_DEVICE & USB_PROP_IS_RAM)
+PROGMEM
+#endif
+char usbDescriptorDevice[];
+extern
+#if !(USB_CFG_DESCR_PROPS_CONFIGURATION & USB_PROP_IS_RAM)
+PROGMEM
+#endif
+char usbDescriptorConfiguration[];
+extern
+#if !(USB_CFG_DESCR_PROPS_HID_REPORT & USB_PROP_IS_RAM)
+PROGMEM
+#endif
+char usbDescriptorHidReport[];
+extern
+#if !(USB_CFG_DESCR_PROPS_STRING_0 & USB_PROP_IS_RAM)
+PROGMEM
+#endif
+char usbDescriptorString0[];
+extern
+#if !(USB_CFG_DESCR_PROPS_STRING_VENDOR & USB_PROP_IS_RAM)
+PROGMEM
+#endif
+int usbDescriptorStringVendor[];
+extern
+#if !(USB_CFG_DESCR_PROPS_STRING_PRODUCT & USB_PROP_IS_RAM)
+PROGMEM
+#endif
+int usbDescriptorStringDevice[];
+extern
+#if !(USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER & USB_PROP_IS_RAM)
+PROGMEM
+#endif
+int usbDescriptorStringSerialNumber[];
+#endif /* __ASSEMBLER__ */
+/* ------------------------------------------------------------------------- */
+/* ------------------------ General Purpose Macros ------------------------- */
+/* ------------------------------------------------------------------------- */
+#define USB_CONCAT(a, b)            a ## b
+#define USB_CONCAT_EXPANDED(a, b)   USB_CONCAT(a, b)
+#define USB_OUTPORT(name)           USB_CONCAT(PORT, name)
+#define USB_INPORT(name)            USB_CONCAT(PIN, name)
+#define USB_DDRPORT(name)           USB_CONCAT(DDR, name)
+/* The double-define trick above lets us concatenate strings which are
+ * defined by macros.
+ */
+/* ------------------------------------------------------------------------- */
+/* ------------------------- Constant definitions -------------------------- */
+/* ------------------------------------------------------------------------- */
+#if !defined __ASSEMBLER__ && (!defined USB_CFG_VENDOR_ID || !defined USB_CFG_DEVICE_ID)
+#warning "You should define USB_CFG_VENDOR_ID and USB_CFG_DEVICE_ID in usbconfig.h"
+/* If the user has not defined IDs, we default to obdev's free IDs.
+ * See USBID-License.txt for details.
+ */
+#endif
+/* make sure we have a VID and PID defined, byte order is lowbyte, highbyte */
+#ifndef USB_CFG_VENDOR_ID
+#   define  USB_CFG_VENDOR_ID   0xc0, 0x16  /* 5824 in dec, stands for VOTI */
+#endif
+#ifndef USB_CFG_DEVICE_ID
+#   if USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH
+#       define USB_CFG_DEVICE_ID    0xdf, 0x05  /* 1503 in dec, shared PID for HIDs */
+#   elif USB_CFG_INTERFACE_CLASS == 2
+#       define USB_CFG_DEVICE_ID    0xe1, 0x05  /* 1505 in dec, shared PID for CDC Modems */
+#   else
+#       define USB_CFG_DEVICE_ID    0xdc, 0x05  /* 1500 in dec, obdev's free PID */
+#   endif
+#endif
+/* Derive Output, Input and DataDirection ports from port names */
+#ifndef USB_CFG_IOPORTNAME
+#error "You must define USB_CFG_IOPORTNAME in usbconfig.h, see usbconfig-prototype.h"
+#endif
+#define USBOUT          USB_OUTPORT(USB_CFG_IOPORTNAME)
+#define USB_PULLUP_OUT  USB_OUTPORT(USB_CFG_PULLUP_IOPORTNAME)
+#define USBIN           USB_INPORT(USB_CFG_IOPORTNAME)
+#define USBDDR          USB_DDRPORT(USB_CFG_IOPORTNAME)
+#define USB_PULLUP_DDR  USB_DDRPORT(USB_CFG_PULLUP_IOPORTNAME)
+#define USBMINUS    USB_CFG_DMINUS_BIT
+#define USBPLUS     USB_CFG_DPLUS_BIT
+#define USBIDLE     (1<<USB_CFG_DMINUS_BIT) /* value representing J state */
+#define USBMASK     ((1<<USB_CFG_DPLUS_BIT) | (1<<USB_CFG_DMINUS_BIT))  /* mask for USB I/O bits */
+/* defines for backward compatibility with older driver versions: */
+#define USB_CFG_IOPORT          USB_OUTPORT(USB_CFG_IOPORTNAME)
+#ifdef USB_CFG_PULLUP_IOPORTNAME
+#define USB_CFG_PULLUP_IOPORT   USB_OUTPORT(USB_CFG_PULLUP_IOPORTNAME)
+#endif
+#define USB_BUFSIZE     11  /* PID, 8 bytes data, 2 bytes CRC */
+/* ----- Try to find registers and bits responsible for ext interrupt 0 ----- */
+#ifndef USB_INTR_CFG    /* allow user to override our default */
+#   if defined  EICRA
+#       define USB_INTR_CFG EICRA
+#   else
+#       define USB_INTR_CFG MCUCR
+#   endif
+#endif
+#ifndef USB_INTR_CFG_SET    /* allow user to override our default */
+#   define USB_INTR_CFG_SET ((1 << ISC00) | (1 << ISC01))    /* cfg for rising edge */
+#endif
+#ifndef USB_INTR_CFG_CLR    /* allow user to override our default */
+#   define USB_INTR_CFG_CLR 0    /* no bits to clear */
+#endif
+#ifndef USB_INTR_ENABLE     /* allow user to override our default */
+#   if defined GIMSK
+#       define USB_INTR_ENABLE  GIMSK
+#   elif defined EIMSK
+#       define USB_INTR_ENABLE  EIMSK
+#   else
+#       define USB_INTR_ENABLE  GICR
+#   endif
+#endif
+#ifndef USB_INTR_ENABLE_BIT /* allow user to override our default */
+#   define USB_INTR_ENABLE_BIT  INT0
+#endif
+#ifndef USB_INTR_PENDING    /* allow user to override our default */
+#   if defined  EIFR
+#       define USB_INTR_PENDING EIFR
+#   else
+#       define USB_INTR_PENDING GIFR
+#   endif
+#endif
+#ifndef USB_INTR_PENDING_BIT    /* allow user to override our default */
+#   define USB_INTR_PENDING_BIT INTF0
+#endif
+/*
+The defines above don't work for the following chips
+at90c8534: no ISC0?, no PORTB, can't find a data sheet
+at86rf401: no PORTB, no MCUCR etc, low clock rate
+atmega103: no ISC0? (maybe omission in header, can't find data sheet)
+atmega603: not defined in avr-libc
+at43usb320, at43usb355, at76c711: have USB anyway
+at94k: is different...
+at90s1200, attiny11, attiny12, attiny15, attiny28: these have no RAM
+*/
+/* ------------------------------------------------------------------------- */
+/* ----------------- USB Specification Constants and Types ----------------- */
+/* ------------------------------------------------------------------------- */
+/* USB Token values */
+#define USBPID_SETUP    0x2d
+#define USBPID_OUT      0xe1
+#define USBPID_IN       0x69
+#define USBPID_DATA0    0xc3
+#define USBPID_DATA1    0x4b
+#define USBPID_ACK      0xd2
+#define USBPID_NAK      0x5a
+#define USBPID_STALL    0x1e
+#ifndef __ASSEMBLER__
+extern uchar    usbTxBuf1[USB_BUFSIZE], usbTxBuf3[USB_BUFSIZE];
+typedef union usbWord{
+    unsigned    word;
+    uchar       bytes[2];
+}usbWord_t;
+typedef struct usbRequest{
+    uchar       bmRequestType;
+    uchar       bRequest;
+    usbWord_t   wValue;
+    usbWord_t   wIndex;
+    usbWord_t   wLength;
+}usbRequest_t;
+/* This structure matches the 8 byte setup request */
+#endif
+/* bmRequestType field in USB setup:
+ * d t t r r r r r, where
+ * d ..... direction: 0=host->device, 1=device->host
+ * t ..... type: 0=standard, 1=class, 2=vendor, 3=reserved
+ * r ..... recipient: 0=device, 1=interface, 2=endpoint, 3=other
+ */
+/* USB setup recipient values */
+#define USBRQ_RCPT_MASK         0x1f
+#define USBRQ_RCPT_DEVICE       0
+#define USBRQ_RCPT_INTERFACE    1
+#define USBRQ_RCPT_ENDPOINT     2
+/* USB request type values */
+#define USBRQ_TYPE_MASK         0x60
+#define USBRQ_TYPE_STANDARD     (0<<5)
+#define USBRQ_TYPE_CLASS        (1<<5)
+#define USBRQ_TYPE_VENDOR       (2<<5)
+/* USB direction values: */
+#define USBRQ_DIR_MASK              0x80
+#define USBRQ_DIR_HOST_TO_DEVICE    (0<<7)
+#define USBRQ_DIR_DEVICE_TO_HOST    (1<<7)
+/* USB Standard Requests */
+#define USBRQ_GET_STATUS        0
+#define USBRQ_CLEAR_FEATURE     1
+#define USBRQ_SET_FEATURE       3
+#define USBRQ_SET_ADDRESS       5
+#define USBRQ_GET_DESCRIPTOR    6
+#define USBRQ_SET_DESCRIPTOR    7
+#define USBRQ_GET_CONFIGURATION 8
+#define USBRQ_SET_CONFIGURATION 9
+#define USBRQ_GET_INTERFACE     10
+#define USBRQ_SET_INTERFACE     11
+#define USBRQ_SYNCH_FRAME       12
+/* USB descriptor constants */
+#define USBDESCR_DEVICE         1
+#define USBDESCR_CONFIG         2
+#define USBDESCR_STRING         3
+#define USBDESCR_INTERFACE      4
+#define USBDESCR_ENDPOINT       5
+#define USBDESCR_HID            0x21
+#define USBDESCR_HID_REPORT     0x22
+#define USBDESCR_HID_PHYS       0x23
+#define USBATTR_BUSPOWER        0x80
+#define USBATTR_SELFPOWER       0x40
+#define USBATTR_REMOTEWAKE      0x20
+/* USB HID Requests */
+#define USBRQ_HID_GET_REPORT    0x01
+#define USBRQ_HID_GET_IDLE      0x02
+#define USBRQ_HID_GET_PROTOCOL  0x03
+#define USBRQ_HID_SET_REPORT    0x09
+#define USBRQ_HID_SET_IDLE      0x0a
+#define USBRQ_HID_SET_PROTOCOL  0x0b
+/* ------------------------------------------------------------------------- */
+#endif /* __usbdrv_h_included__ */

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/usbdrvasm.S
 ,0 → 1,710
+/* Name: usbdrvasm.S
+ * Project: AVR USB driver
+ * Author: Christian Starkjohann
+ * Creation Date: 2004-12-29
+ * Tabsize: 4
+ * Copyright: (c) 2007 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
+ * This Revision: $Id: usbdrvasm.S,v 1.2 2007/05/19 12:30:11 harbaum Exp $
+ */
+/*
+General Description:
+This module implements the assembler part of the USB driver. See usbdrv.h
+for a description of the entire driver.
+Since almost all of this code is timing critical, don't change unless you
+really know what you are doing! Many parts require not only a maximum number
+of CPU cycles, but even an exact number of cycles!
+Timing constraints according to spec (in bit times):
+timing subject                                      min max    CPUcycles
+---------------------------------------------------------------------------
+EOP of OUT/SETUP to sync pattern of DATA0 (both rx) 2   16     16-128
+EOP of IN to sync pattern of DATA0 (rx, then tx)    2   7.5    16-60
+DATAx (rx) to ACK/NAK/STALL (tx)                    2   7.5    16-60
+*/
+#include "iarcompat.h"
+#ifndef __IAR_SYSTEMS_ASM__
+    /* configs for io.h */
+#   define __SFR_OFFSET 0
+#   define _VECTOR(N)   __vector_ ## N   /* io.h does not define this for asm */
+#   include <avr/io.h> /* for CPU I/O register definitions and vectors */
+#endif  /* __IAR_SYSTEMS_ASM__ */
+#include "usbdrv.h" /* for common defs */
+/* register names */
+#define x1      r16
+#define x2      r17
+#define shift   r18
+#define cnt     r19
+#define x3      r20
+#define x4      r21
+/* Some assembler dependent definitions and declarations: */
+#ifdef __IAR_SYSTEMS_ASM__
+#   define nop2     rjmp    $+2 /* jump to next instruction */
+#   define XL       r26
+#   define XH       r27
+#   define YL       r28
+#   define YH       r29
+#   define ZL       r30
+#   define ZH       r31
+#   define lo8(x)   LOW(x)
+#   define hi8(x)   ((x)>>8)    /* not HIGH to allow XLINK to make a proper range check */
+    extern  usbRxBuf, usbDeviceAddr, usbNewDeviceAddr, usbInputBufOffset
+    extern  usbCurrentTok, usbRxLen, usbRxToken, usbTxLen
+    extern  usbTxBuf, usbMsgLen, usbTxLen1, usbTxBuf1, usbTxLen3, usbTxBuf3
+    public  usbCrc16
+    public  usbCrc16Append
+    COMMON  INTVEC
+    ORG     INT0_vect
+    rjmp    SIG_INTERRUPT0
+    RSEG    CODE
+#else /* __IAR_SYSTEMS_ASM__ */
+#   define nop2     rjmp    .+0 /* jump to next instruction */
+    .text
+    .global SIG_INTERRUPT0
+    .type   SIG_INTERRUPT0, @function
+    .global usbCrc16
+    .global usbCrc16Append
+#endif /* __IAR_SYSTEMS_ASM__ */
+;Software-receiver engine. Strict timing! Don't change unless you can preserve timing!
+;interrupt response time: 4 cycles + insn running = 7 max if interrupts always enabled
+;max allowable interrupt latency: 34 cycles -> max 25 cycles interrupt disable
+;max stack usage: [ret(2), YL, SREG, YH, shift, x1, x2, x3, cnt, x4] = 11 bytes
+;Numbers in brackets are maximum cycles since SOF.
+SIG_INTERRUPT0:
+;order of registers pushed: YL, SREG [sofError], YH, shift, x1, x2, x3, cnt
+    push    YL              ;2 [35] push only what is necessary to sync with edge ASAP
+    in      YL, SREG        ;1 [37]
+    push    YL              ;2 [39]
+;----------------------------------------------------------------------------
+; Synchronize with sync pattern:
+;----------------------------------------------------------------------------
+;sync byte (D-) pattern LSb to MSb: 01010100 [1 = idle = J, 0 = K]
+;sync up with J to K edge during sync pattern -- use fastest possible loops
+;first part has no timeout because it waits for IDLE or SE1 (== disconnected)
+waitForJ:
+    sbis    USBIN, USBMINUS ;1 [40] wait for D- == 1
+    rjmp    waitForJ        ;2
+waitForK:
+;The following code results in a sampling window of 1/4 bit which meets the spec.
+    sbis    USBIN, USBMINUS
+    rjmp    foundK
+    sbis    USBIN, USBMINUS
+    rjmp    foundK
+    sbis    USBIN, USBMINUS
+    rjmp    foundK
+    sbis    USBIN, USBMINUS
+    rjmp    foundK
+    sbis    USBIN, USBMINUS
+    rjmp    foundK
+    rjmp    sofError
+foundK:
+;{3, 5} after falling D- edge, average delay: 4 cycles [we want 4 for center sampling]
+;we have 1 bit time for setup purposes, then sample again. Numbers in brackets
+;are cycles from center of first sync (double K) bit after the instruction
+    push    YH                  ;2 [2]
+    lds     YL, usbInputBufOffset;2 [4]
+    clr     YH                  ;1 [5]
+    subi    YL, lo8(-(usbRxBuf));1 [6]
+    sbci    YH, hi8(-(usbRxBuf));1 [7]
+    sbis    USBIN, USBMINUS ;1 [8] we want two bits K [sample 1 cycle too early]
+    rjmp    haveTwoBitsK    ;2 [10]
+    pop     YH              ; undo the push from before
+    rjmp    waitForK        ; this was not the end of sync, retry
+haveTwoBitsK:
+;----------------------------------------------------------------------------
+; push more registers and initialize values while we sample the first bits:
+;----------------------------------------------------------------------------
+    push    shift           ;2 [16]
+    push    x1              ;2 [12]
+    push    x2              ;2 [14]
+    in      x1, USBIN       ;1 [17] <-- sample bit 0
+    ldi     shift, 0xff     ;1 [18]
+    bst     x1, USBMINUS    ;1 [19]
+    bld     shift, 0        ;1 [20]
+    push    x3              ;2 [22]
+    push    cnt             ;2 [24]
+    in      x2, USBIN       ;1 [25] <-- sample bit 1
+    ser     x3              ;1 [26] [inserted init instruction]
+    eor     x1, x2          ;1 [27]
+    bst     x1, USBMINUS    ;1 [28]
+    bld     shift, 1        ;1 [29]
+    ldi     cnt, USB_BUFSIZE;1 [30] [inserted init instruction]
+    rjmp    rxbit2          ;2 [32]
+;----------------------------------------------------------------------------
+; Receiver loop (numbers in brackets are cycles within byte after instr)
+;----------------------------------------------------------------------------
+unstuff0:               ;1 (branch taken)
+    andi    x3, ~0x01   ;1 [15]
+    mov     x1, x2      ;1 [16] x2 contains last sampled (stuffed) bit
+    in      x2, USBIN   ;1 [17] <-- sample bit 1 again
+    ori     shift, 0x01 ;1 [18]
+    rjmp    didUnstuff0 ;2 [20]
+unstuff1:               ;1 (branch taken)
+    mov     x2, x1      ;1 [21] x1 contains last sampled (stuffed) bit
+    andi    x3, ~0x02   ;1 [22]
+    ori     shift, 0x02 ;1 [23]
+    nop                 ;1 [24]
+    in      x1, USBIN   ;1 [25] <-- sample bit 2 again
+    rjmp    didUnstuff1 ;2 [27]
+unstuff2:               ;1 (branch taken)
+    andi    x3, ~0x04   ;1 [29]
+    ori     shift, 0x04 ;1 [30]
+    mov     x1, x2      ;1 [31] x2 contains last sampled (stuffed) bit
+    nop                 ;1 [32]
+    in      x2, USBIN   ;1 [33] <-- sample bit 3
+    rjmp    didUnstuff2 ;2 [35]
+unstuff3:               ;1 (branch taken)
+    in      x2, USBIN   ;1 [34] <-- sample stuffed bit 3 [one cycle too late]
+    andi    x3, ~0x08   ;1 [35]
+    ori     shift, 0x08 ;1 [36]
+    rjmp    didUnstuff3 ;2 [38]
+unstuff4:               ;1 (branch taken)
+    andi    x3, ~0x10   ;1 [40]
+    in      x1, USBIN   ;1 [41] <-- sample stuffed bit 4
+    ori     shift, 0x10 ;1 [42]
+    rjmp    didUnstuff4 ;2 [44]
+unstuff5:               ;1 (branch taken)
+    andi    x3, ~0x20   ;1 [48]
+    in      x2, USBIN   ;1 [49] <-- sample stuffed bit 5
+    ori     shift, 0x20 ;1 [50]
+    rjmp    didUnstuff5 ;2 [52]
+unstuff6:               ;1 (branch taken)
+    andi    x3, ~0x40   ;1 [56]
+    in      x1, USBIN   ;1 [57] <-- sample stuffed bit 6
+    ori     shift, 0x40 ;1 [58]
+    rjmp    didUnstuff6 ;2 [60]
+; extra jobs done during bit interval:
+; bit 0:    store, clear [SE0 is unreliable here due to bit dribbling in hubs]
+; bit 1:    se0 check
+; bit 2:    overflow check
+; bit 3:    recovery from delay [bit 0 tasks took too long]
+; bit 4:    none
+; bit 5:    none
+; bit 6:    none
+; bit 7:    jump, eor
+rxLoop:
+    eor     x3, shift   ;1 [0] reconstruct: x3 is 0 at bit locations we changed, 1 at others
+    in      x1, USBIN   ;1 [1] <-- sample bit 0
+    st      y+, x3      ;2 [3] store data
+    ser     x3          ;1 [4]
+    nop                 ;1 [5]
+    eor     x2, x1      ;1 [6]
+    bst     x2, USBMINUS;1 [7]
+    bld     shift, 0    ;1 [8]
+    in      x2, USBIN   ;1 [9] <-- sample bit 1 (or possibly bit 0 stuffed)
+    andi    x2, USBMASK ;1 [10]
+    breq    se0         ;1 [11] SE0 check for bit 1
+    andi    shift, 0xf9 ;1 [12]
+didUnstuff0:
+    breq    unstuff0    ;1 [13]
+    eor     x1, x2      ;1 [14]
+    bst     x1, USBMINUS;1 [15]
+    bld     shift, 1    ;1 [16]
+rxbit2:
+    in      x1, USBIN   ;1 [17] <-- sample bit 2 (or possibly bit 1 stuffed)
+    andi    shift, 0xf3 ;1 [18]
+    breq    unstuff1    ;1 [19] do remaining work for bit 1
+didUnstuff1:
+    subi    cnt, 1      ;1 [20]
+    brcs    overflow    ;1 [21] loop control
+    eor     x2, x1      ;1 [22]
+    bst     x2, USBMINUS;1 [23]
+    bld     shift, 2    ;1 [24]
+    in      x2, USBIN   ;1 [25] <-- sample bit 3 (or possibly bit 2 stuffed)
+    andi    shift, 0xe7 ;1 [26]
+    breq    unstuff2    ;1 [27]
+didUnstuff2:
+    eor     x1, x2      ;1 [28]
+    bst     x1, USBMINUS;1 [29]
+    bld     shift, 3    ;1 [30]
+didUnstuff3:
+    andi    shift, 0xcf ;1 [31]
+    breq    unstuff3    ;1 [32]
+    in      x1, USBIN   ;1 [33] <-- sample bit 4
+    eor     x2, x1      ;1 [34]
+    bst     x2, USBMINUS;1 [35]
+    bld     shift, 4    ;1 [36]
+didUnstuff4:
+    andi    shift, 0x9f ;1 [37]
+    breq    unstuff4    ;1 [38]
+    nop2                ;2 [40]
+    in      x2, USBIN   ;1 [41] <-- sample bit 5
+    eor     x1, x2      ;1 [42]
+    bst     x1, USBMINUS;1 [43]
+    bld     shift, 5    ;1 [44]
+didUnstuff5:
+    andi    shift, 0x3f ;1 [45]
+    breq    unstuff5    ;1 [46]
+    nop2                ;2 [48]
+    in      x1, USBIN   ;1 [49] <-- sample bit 6
+    eor     x2, x1      ;1 [50]
+    bst     x2, USBMINUS;1 [51]
+    bld     shift, 6    ;1 [52]
+didUnstuff6:
+    cpi     shift, 0x02 ;1 [53]
+    brlo    unstuff6    ;1 [54]
+    nop2                ;2 [56]
+    in      x2, USBIN   ;1 [57] <-- sample bit 7
+    eor     x1, x2      ;1 [58]
+    bst     x1, USBMINUS;1 [59]
+    bld     shift, 7    ;1 [60]
+didUnstuff7:
+    cpi     shift, 0x04 ;1 [61]
+    brsh    rxLoop      ;2 [63] loop control
+unstuff7:
+    andi    x3, ~0x80   ;1 [63]
+    ori     shift, 0x80 ;1 [64]
+    in      x2, USBIN   ;1 [65] <-- sample stuffed bit 7
+    nop                 ;1 [66]
+    rjmp    didUnstuff7 ;2 [68]
+;----------------------------------------------------------------------------
+; Processing of received packet (numbers in brackets are cycles after end of SE0)
+;----------------------------------------------------------------------------
+;This is the only non-error exit point for the software receiver loop
+;we don't check any CRCs here because there is no time left.
+#define token   x1
+se0:                            ;  [0]
+    subi    cnt, USB_BUFSIZE    ;1 [1]
+    neg     cnt                 ;1 [2]
+    cpi     cnt, 3              ;1 [3]
+    ldi     x2, 1<<USB_INTR_PENDING_BIT ;1 [4]
+    out     USB_INTR_PENDING, x2;1 [5] clear pending intr and check flag later. SE0 should be over.
+    brlo    doReturn            ;1 [6] this is probably an ACK, NAK or similar packet
+    sub     YL, cnt             ;1 [7]
+    sbci    YH, 0               ;1 [8]
+    ld      token, y            ;2 [10]
+    cpi     token, USBPID_DATA0 ;1 [11]
+    breq    handleData          ;1 [12]
+    cpi     token, USBPID_DATA1 ;1 [13]
+    breq    handleData          ;1 [14]
+    ldd     x2, y+1             ;2 [16] ADDR and 1 bit endpoint number
+    mov     x3, x2              ;1 [17] store for endpoint number
+    andi    x2, 0x7f            ;1 [18] x2 is now ADDR
+    lds     shift, usbDeviceAddr;2 [20]
+    cp      x2, shift           ;1 [21]
+overflow:                       ; This is a hack: brcs overflow will never have Z flag set
+    brne    ignorePacket        ;1 [22] packet for different address
+    cpi     token, USBPID_IN    ;1 [23]
+    breq    handleIn            ;1 [24]
+    cpi     token, USBPID_SETUP ;1 [25]
+    breq    handleSetupOrOut    ;1 [26]
+    cpi     token, USBPID_OUT   ;1 [27]
+    breq    handleSetupOrOut    ;1 [28]
+;   rjmp    ignorePacket        ;fallthrough, should not happen anyway.
+ignorePacket:
+    clr     shift
+    sts     usbCurrentTok, shift
+doReturn:
+    pop     cnt
+    pop     x3
+    pop     x2
+    pop     x1
+    pop     shift
+    pop     YH
+sofError:
+    pop     YL
+    out     SREG, YL
+    pop     YL
+    reti
+#if USB_CFG_HAVE_INTRIN_ENDPOINT && USB_CFG_HAVE_INTRIN_ENDPOINT3
+handleIn3:                      ;1 [38] (branch taken)
+    lds     cnt, usbTxLen3      ;2 [40]
+    sbrc    cnt, 4              ;2 [42]
+    rjmp    sendCntAndReti      ;0 43 + 17 = 60 until SOP
+    sts     usbTxLen3, x1       ;2 [44] x1 == USBPID_NAK from above
+    ldi     YL, lo8(usbTxBuf3)  ;1 [45]
+    ldi     YH, hi8(usbTxBuf3)  ;1 [46]
+    rjmp    usbSendAndReti      ;2 [48] + 13 = 61 until SOP (violates the spec by 1 cycle)
+#endif
+;Setup and Out are followed by a data packet two bit times (16 cycles) after
+;the end of SE0. The sync code allows up to 40 cycles delay from the start of
+;the sync pattern until the first bit is sampled. That's a total of 56 cycles.
+handleSetupOrOut:               ;1 [29] (branch taken)
+#if USB_CFG_IMPLEMENT_FN_WRITEOUT   /* if we have data for second OUT endpoint, set usbCurrentTok to -1 */
+    sbrc    x3, 7               ;1 [30] skip if endpoint 0
+    ldi     token, -1           ;1 [31] indicate that this is endpoint 1 OUT
+#endif
+    sts     usbCurrentTok, token;2 [33]
+    pop     cnt                 ;2 [35]
+    pop     x3                  ;2 [37]
+    pop     x2                  ;2 [39]
+    pop     x1                  ;2 [41]
+    pop     shift               ;2 [43]
+    pop     YH                  ;2 [45]
+    in      YL, USB_INTR_PENDING;1 [46]
+    sbrc    YL, USB_INTR_PENDING_BIT;1 [47] check whether data is already arriving
+    rjmp    waitForJ            ;2 [49] save the pops and pushes -- a new interrupt is aready pending
+    rjmp    sofError            ;2 not an error, but it does the pops and reti we want
+handleData:                     ;1 [15] (branch taken)
+    lds     token, usbCurrentTok;2 [17]
+    tst     token               ;1 [18]
+    breq    doReturn            ;1 [19]
+    lds     x2, usbRxLen        ;2 [21]
+    tst     x2                  ;1 [22]
+    brne    sendNakAndReti      ;1 [23]
+; 2006-03-11: The following two lines fix a problem where the device was not
+; recognized if usbPoll() was called less frequently than once every 4 ms.
+    cpi     cnt, 4              ;1 [24] zero sized data packets are status phase only -- ignore and ack
+    brmi    sendAckAndReti      ;1 [25] keep rx buffer clean -- we must not NAK next SETUP
+    sts     usbRxLen, cnt       ;2 [27] store received data, swap buffers
+    sts     usbRxToken, token   ;2 [29]
+    lds     x2, usbInputBufOffset;2 [31] swap buffers
+    ldi     cnt, USB_BUFSIZE    ;1 [32]
+    sub     cnt, x2             ;1 [33]
+    sts     usbInputBufOffset, cnt;2 [35] buffers now swapped
+    rjmp    sendAckAndReti      ;2 [37] + 19 = 56 until SOP
+handleIn:                       ;1 [25] (branch taken)
+;We don't send any data as long as the C code has not processed the current
+;input data and potentially updated the output data. That's more efficient
+;in terms of code size than clearing the tx buffers when a packet is received.
+    lds     x1, usbRxLen        ;2 [27]
+    cpi     x1, 1               ;1 [28] negative values are flow control, 0 means "buffer free"
+    brge    sendNakAndReti      ;1 [29] unprocessed input packet?
+    ldi     x1, USBPID_NAK      ;1 [30] prepare value for usbTxLen
+#if USB_CFG_HAVE_INTRIN_ENDPOINT
+    sbrc    x3, 7               ;2 [33] x3 contains addr + endpoint
+    rjmp    handleIn1           ;0
+#endif
+    lds     cnt, usbTxLen       ;2 [34]
+    sbrc    cnt, 4              ;2 [36] all handshake tokens have bit 4 set
+    rjmp    sendCntAndReti      ;0 37 + 17 = 54 until SOP
+    sts     usbTxLen, x1        ;2 [38] x1 == USBPID_NAK from above
+    ldi     YL, lo8(usbTxBuf)   ;1 [39]
+    ldi     YH, hi8(usbTxBuf)   ;1 [40]
+    rjmp    usbSendAndReti      ;2 [42] + 14 = 56 until SOP
+; Comment about when to set usbTxLen to USBPID_NAK:
+; We should set it back when we receive the ACK from the host. This would
+; be simple to implement: One static variable which stores whether the last
+; tx was for endpoint 0 or 1 and a compare in the receiver to distinguish the
+; ACK. However, we set it back immediately when we send the package,
+; assuming that no error occurs and the host sends an ACK. We save one byte
+; RAM this way and avoid potential problems with endless retries. The rest of
+; the driver assumes error-free transfers anyway.
+#if USB_CFG_HAVE_INTRIN_ENDPOINT    /* placed here due to relative jump range */
+handleIn1:                      ;1 [33] (branch taken)
+#if USB_CFG_HAVE_INTRIN_ENDPOINT3
+; 2006-06-10 as suggested by O.Tamura: support second INTR IN / BULK IN endpoint
+    ldd     x2, y+2             ;2 [35]
+    sbrc    x2, 0               ;2 [37]
+    rjmp    handleIn3           ;0
+#endif
+    lds     cnt, usbTxLen1      ;2 [39]
+    sbrc    cnt, 4              ;2 [41] all handshake tokens have bit 4 set
+    rjmp    sendCntAndReti      ;0 42 + 17 = 59 until SOP
+    sts     usbTxLen1, x1       ;2 [43] x1 == USBPID_NAK from above
+    ldi     YL, lo8(usbTxBuf1)  ;1 [44]
+    ldi     YH, hi8(usbTxBuf1)  ;1 [45]
+    rjmp    usbSendAndReti      ;2 [47] + 13 = 60 until SOP
+#endif
+;----------------------------------------------------------------------------
+; Transmitting data
+;----------------------------------------------------------------------------
+bitstuff0:                  ;1 (for branch taken)
+    eor     x1, x4          ;1
+    ldi     x2, 0           ;1
+    out     USBOUT, x1      ;1 <-- out
+    rjmp    didStuff0       ;2 branch back 2 cycles earlier
+bitstuff1:                  ;1 (for branch taken)
+    eor     x1, x4          ;1
+    rjmp    didStuff1       ;2 we know that C is clear, jump back to do OUT and ror 0 into x2
+bitstuff2:                  ;1 (for branch taken)
+    eor     x1, x4          ;1
+    rjmp    didStuff2       ;2 jump back 4 cycles earlier and do out and ror 0 into x2
+bitstuff3:                  ;1 (for branch taken)
+    eor     x1, x4          ;1
+    rjmp    didStuff3       ;2 jump back earlier and ror 0 into x2
+bitstuff4:                  ;1 (for branch taken)
+    eor     x1, x4          ;1
+    ldi     x2, 0           ;1
+    out     USBOUT, x1      ;1 <-- out
+    rjmp    didStuff4       ;2 jump back 2 cycles earlier
+sendNakAndReti:                 ;0 [-19] 19 cycles until SOP
+    ldi     x3, USBPID_NAK      ;1 [-18]
+    rjmp    usbSendX3           ;2 [-16]
+sendAckAndReti:                 ;0 [-19] 19 cycles until SOP
+    ldi     x3, USBPID_ACK      ;1 [-18]
+    rjmp    usbSendX3           ;2 [-16]
+sendCntAndReti:                 ;0 [-17] 17 cycles until SOP
+    mov     x3, cnt             ;1 [-16]
+usbSendX3:                      ;0 [-16]
+    ldi     YL, 20              ;1 [-15] 'x3' is R20
+    ldi     YH, 0               ;1 [-14]
+    ldi     cnt, 2              ;1 [-13]
+;   rjmp    usbSendAndReti      fallthrough
+; USB spec says:
+; idle = J
+; J = (D+ = 0), (D- = 1) or USBOUT = 0x01
+; K = (D+ = 1), (D- = 0) or USBOUT = 0x02
+; Spec allows 7.5 bit times from EOP to SOP for replies (= 60 cycles)
+;usbSend:
+;pointer to data in 'Y'
+;number of bytes in 'cnt' -- including sync byte
+;uses: x1...x4, shift, cnt, Y
+;Numbers in brackets are time since first bit of sync pattern is sent
+usbSendAndReti:             ;0 [-13] timing: 13 cycles until SOP
+    in      x2, USBDDR      ;1 [-12]
+    ori     x2, USBMASK     ;1 [-11]
+    sbi     USBOUT, USBMINUS;2 [-9] prepare idle state; D+ and D- must have been 0 (no pullups)
+    in      x1, USBOUT      ;1 [-8] port mirror for tx loop
+    out     USBDDR, x2      ;1 [-7] <- acquire bus
+; need not init x2 (bitstuff history) because sync starts with 0
+    push    x4              ;2 [-5]
+    ldi     x4, USBMASK     ;1 [-4] exor mask
+    ldi     shift, 0x80     ;1 [-3] sync byte is first byte sent
+txLoop:                     ;       [62]
+    sbrs    shift, 0        ;1 [-2] [62]
+    eor     x1, x4          ;1 [-1] [63]
+    out     USBOUT, x1      ;1 [0] <-- out bit 0
+    ror     shift           ;1 [1]
+    ror     x2              ;1 [2]
+didStuff0:
+    cpi     x2, 0xfc        ;1 [3]
+    brsh    bitstuff0       ;1 [4]
+    sbrs    shift, 0        ;1 [5]
+    eor     x1, x4          ;1 [6]
+    ror     shift           ;1 [7]
+didStuff1:
+    out     USBOUT, x1      ;1 [8] <-- out bit 1
+    ror     x2              ;1 [9]
+    cpi     x2, 0xfc        ;1 [10]
+    brsh    bitstuff1       ;1 [11]
+    sbrs    shift, 0        ;1 [12]
+    eor     x1, x4          ;1 [13]
+    ror     shift           ;1 [14]
+didStuff2:
+    ror     x2              ;1 [15]
+    out     USBOUT, x1      ;1 [16] <-- out bit 2
+    cpi     x2, 0xfc        ;1 [17]
+    brsh    bitstuff2       ;1 [18]
+    sbrs    shift, 0        ;1 [19]
+    eor     x1, x4          ;1 [20]
+    ror     shift           ;1 [21]
+didStuff3:
+    ror     x2              ;1 [22]
+    cpi     x2, 0xfc        ;1 [23]
+    out     USBOUT, x1      ;1 [24] <-- out bit 3
+    brsh    bitstuff3       ;1 [25]
+    nop2                    ;2 [27]
+    ld      x3, y+          ;2 [29]
+    sbrs    shift, 0        ;1 [30]
+    eor     x1, x4          ;1 [31]
+    out     USBOUT, x1      ;1 [32] <-- out bit 4
+    ror     shift           ;1 [33]
+    ror     x2              ;1 [34]
+didStuff4:
+    cpi     x2, 0xfc        ;1 [35]
+    brsh    bitstuff4       ;1 [36]
+    sbrs    shift, 0        ;1 [37]
+    eor     x1, x4          ;1 [38]
+    ror     shift           ;1 [39]
+didStuff5:
+    out     USBOUT, x1      ;1 [40] <-- out bit 5
+    ror     x2              ;1 [41]
+    cpi     x2, 0xfc        ;1 [42]
+    brsh    bitstuff5       ;1 [43]
+    sbrs    shift, 0        ;1 [44]
+    eor     x1, x4          ;1 [45]
+    ror     shift           ;1 [46]
+didStuff6:
+    ror     x2              ;1 [47]
+    out     USBOUT, x1      ;1 [48] <-- out bit 6
+    cpi     x2, 0xfc        ;1 [49]
+    brsh    bitstuff6       ;1 [50]
+    sbrs    shift, 0        ;1 [51]
+    eor     x1, x4          ;1 [52]
+    ror     shift           ;1 [53]
+didStuff7:
+    ror     x2              ;1 [54]
+    cpi     x2, 0xfc        ;1 [55]
+    out     USBOUT, x1      ;1 [56] <-- out bit 7
+    brsh    bitstuff7       ;1 [57]
+    mov     shift, x3       ;1 [58]
+    dec     cnt             ;1 [59]
+    brne    txLoop          ;1/2 [60/61]
+;make SE0:
+    cbr     x1, USBMASK     ;1 [61] prepare SE0 [spec says EOP may be 15 to 18 cycles]
+    pop     x4              ;2 [63]
+;brackets are cycles from start of SE0 now
+    out     USBOUT, x1      ;1 [0] <-- out SE0 -- from now 2 bits = 16 cycles until bus idle
+    nop2                    ;2 [2]
+;2006-03-06: moved transfer of new address to usbDeviceAddr from C-Code to asm:
+;set address only after data packet was sent, not after handshake
+    lds     x2, usbNewDeviceAddr;2 [4]
+    subi    YL, 20 + 2      ;1 [5]
+    sbci    YH, 0           ;1 [6]
+    breq    skipAddrAssign  ;2 [8]
+    sts     usbDeviceAddr, x2;0  if not skipped: SE0 is one cycle longer
+skipAddrAssign:
+;end of usbDeviceAddress transfer
+    ldi     x2, 1<<USB_INTR_PENDING_BIT;1 [9] int0 occurred during TX -- clear pending flag
+    out     USB_INTR_PENDING, x2;1 [10]
+    ori     x1, USBIDLE     ;1 [11]
+    in      x2, USBDDR      ;1 [12]
+    cbr     x2, USBMASK     ;1 [13] set both pins to input
+    mov     x3, x1          ;1 [14]
+    cbr     x3, USBMASK     ;1 [15] configure no pullup on both pins
+    out     USBOUT, x1      ;1 [16] <-- out J (idle) -- end of SE0 (EOP signal)
+    out     USBDDR, x2      ;1 [17] <-- release bus now
+    out     USBOUT, x3      ;1 [18] <-- ensure no pull-up resistors are active
+    rjmp    doReturn
+bitstuff5:                  ;1 (for branch taken)
+    eor     x1, x4          ;1
+    rjmp    didStuff5       ;2 same trick as above...
+bitstuff6:                  ;1 (for branch taken)
+    eor     x1, x4          ;1
+    rjmp    didStuff6       ;2 same trick as above...
+bitstuff7:                  ;1 (for branch taken)
+    eor     x1, x4          ;1
+    rjmp    didStuff7       ;2 same trick as above...
+;----------------------------------------------------------------------------
+; Utility functions
+;----------------------------------------------------------------------------
+#ifdef __IAR_SYSTEMS_ASM__
+/* Register assignments for usbCrc16 on IAR cc */
+/* Calling conventions on IAR:
+ * First parameter passed in r16/r17, second in r18/r19 and so on.
+ * Callee must preserve r4-r15, r24-r29 (r28/r29 is frame pointer)
+ * Result is passed in r16/r17
+ * In case of the "tiny" memory model, pointers are only 8 bit with no
+ * padding. We therefore pass argument 1 as "16 bit unsigned".
+ */
+RTMODEL "__rt_version", "3"
+/* The line above will generate an error if cc calling conventions change.
+ * The value "3" above is valid for IAR 4.10B/W32
+ */
+#   define argLen   r18 /* argument 2 */
+#   define argPtrL  r16 /* argument 1 */
+#   define argPtrH  r17 /* argument 1 */
+#   define resCrcL  r16 /* result */
+#   define resCrcH  r17 /* result */
+#   define ptrL     ZL
+#   define ptrH     ZH
+#   define ptr      Z
+#   define byte     r22
+#   define bitCnt   r19
+#   define polyL    r20
+#   define polyH    r21
+#   define scratch  r23
+#else  /* __IAR_SYSTEMS_ASM__ */
+/* Register assignments for usbCrc16 on gcc */
+/* Calling conventions on gcc:
+ * First parameter passed in r24/r25, second in r22/23 and so on.
+ * Callee must preserve r1-r17, r28/r29
+ * Result is passed in r24/r25
+ */
+#   define argLen   r22 /* argument 2 */
+#   define argPtrL  r24 /* argument 1 */
+#   define argPtrH  r25 /* argument 1 */
+#   define resCrcL  r24 /* result */
+#   define resCrcH  r25 /* result */
+#   define ptrL     XL
+#   define ptrH     XH
+#   define ptr      x
+#   define byte     r18
+#   define bitCnt   r19
+#   define polyL    r20
+#   define polyH    r21
+#   define scratch  r23
+#endif
+; extern unsigned usbCrc16(unsigned char *data, unsigned char len);
+; data: r24/25
+; len: r22
+; temp variables:
+;   r18: data byte
+;   r19: bit counter
+;   r20/21: polynomial
+;   r23: scratch
+;   r24/25: crc-sum
+;   r26/27=X: ptr
+usbCrc16:
+    mov     ptrL, argPtrL
+    mov     ptrH, argPtrH
+    ldi     resCrcL, 0xff
+    ldi     resCrcH, 0xff
+    ldi     polyL, lo8(0xa001)
+    ldi     polyH, hi8(0xa001)
+crcByteLoop:
+    subi    argLen, 1
+    brcs    crcReady
+    ld      byte, ptr+
+    ldi     bitCnt, 8
+crcBitLoop:
+    mov     scratch, byte
+    eor     scratch, resCrcL
+    lsr     resCrcH
+    ror     resCrcL
+    lsr     byte
+    sbrs    scratch, 0
+    rjmp    crcNoXor
+    eor     resCrcL, polyL
+    eor     resCrcH, polyH
+crcNoXor:
+    dec     bitCnt
+    brne    crcBitLoop
+    rjmp    crcByteLoop
+crcReady:
+    com     resCrcL
+    com     resCrcH
+    ret
+; extern unsigned usbCrc16Append(unsigned char *data, unsigned char len);
+usbCrc16Append:
+    rcall   usbCrc16
+    st      ptr+, resCrcL
+    st      ptr+, resCrcH
+    ret

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbdrv/usbdrvasm.asm
 ,0 → 1,21
+/* Name: usbdrvasm.asm
+ * Project: AVR USB driver
+ * Author: Christian Starkjohann
+ * Creation Date: 2006-03-01
+ * Tabsize: 4
+ * Copyright: (c) 2006 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
+ * This Revision: $Id: usbdrvasm.asm,v 1.2 2007/05/19 12:30:11 harbaum Exp $
+ */
+/*
+General Description:
+The IAR compiler/assembler system prefers assembler files with file extension
+".asm". We simply provide this file as an alias for usbdrvasm.S.
+Thanks to Oleg Semyonov for his help with the IAR tools port!
+*/
+#include "usbdrvasm.S"
+end

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbtiny/common.mk
 ,0 → 1,61
+# ======================================================================
+# Common Makefile for USBtiny applications
+#
+# Macros to be defined before including this file:
+#
+# USBTINY       - the location of this directory
+# TARGET_ARCH   - gcc -mmcu= option with AVR device type
+# OBJECTS       - the objects in addition to the USBtiny objects
+# FLASH_CMD     - command to upload main.hex to flash
+# STACK         - maximum stack size (optional)
+# FLASH         - flash size (optional)
+# SRAM          - SRAM size (optional)
+# SCHEM         - Postscript version of the schematic to be generated
+#
+# Copyright (C) 2006 Dick Streefland
+#
+# This is free software, licensed under the terms of the GNU General
+# Public License as published by the Free Software Foundation.
+# ======================================================================
+CC      = avr-gcc
+CFLAGS  = -Os -g -Wall -I. -I$(USBTINY)
+ASFLAGS = -Os -g -Wall -I.
+LDFLAGS = -g
+MODULES = crc.o int.o usb.o $(OBJECTS)
+UTIL    = $(USBTINY)/../util
+main.hex:
+all:            main.hex $(SCHEM)
+clean:
+        rm -f main.elf *.o tags *.sch~ gschem.log
+clobber:        clean
+        rm -f main.hex $(SCHEM)
+main.elf:       $(MODULES)
+        $(LINK.o) -o $@ $(MODULES)
+main.hex:       main.elf $(UTIL)/check.py
+        @python $(UTIL)/check.py main.elf $(STACK) $(FLASH) $(SRAM)
+        avr-objcopy -j .text -j .data -O ihex main.elf main.hex
+disasm:         main.elf
+        avr-objdump -S main.elf
+flash:          main.hex
+        $(FLASH_CMD)
+crc.o:          $(USBTINY)/crc.S $(USBTINY)/def.h usbtiny.h
+        $(COMPILE.c) $(USBTINY)/crc.S
+int.o:          $(USBTINY)/int.S $(USBTINY)/def.h usbtiny.h
+        $(COMPILE.c) $(USBTINY)/int.S
+usb.o:          $(USBTINY)/usb.c $(USBTINY)/def.h $(USBTINY)/usb.h usbtiny.h
+        $(COMPILE.c) $(USBTINY)/usb.c
+main.o:         $(USBTINY)/usb.h
+%.ps:           %.sch $(UTIL)/sch2ps
+        $(UTIL)/sch2ps $<

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbtiny/crc.S
 ,0 → 1,123
+; ======================================================================
+; Calculate and append CRC
+;
+; The CRC is calculated 4 bits at a time, using a precomputed table of
+; 16 values. Each value is 16 bits, but only the 8 significant bits are
+; stored. The table should not cross a 256-byte page. The check.py script
+; will check for this.
+;
+; A bitwise algorithm would be a little smaller, but takes more time.
+; In fact, it takes too much time for the USB controller in my laptop.
+; The poll frequently is so high, that a lot of time is spent in the
+; interrupt handler, sending NAK packets, leaving little time for the
+; actual checksum calculation. An 8 bit algoritm would be even faster,
+; but requires a lookup table of 512 bytes.
+;
+; Copyright (C) 2006 Dick Streefland
+;
+; This is free software, licensed under the terms of the GNU General
+; Public License as published by the Free Software Foundation.
+; ======================================================================
+#include "def.h"
+; ----------------------------------------------------------------------
+; void crc(unsigned char *data, unsigned char len);
+; ----------------------------------------------------------------------
+#define data    r24
+#define len     r22
+#define b       r18
+#define tmp     r19
+#define zl      r20
+#define crc_l   r24
+#define crc_h   r25
+        .text
+        .global crc
+        .type   crc, @function
+crc:
+        ; crc = 0xffff
+        movw    XL, r24
+        ldi     crc_h, 0xff
+        ldi     crc_l, 0xff
+        lsl     len
+        breq    done
+        ldi     zl, lo8(crc4tab)
+        ldi     ZH, hi8(crc4tab)
+next_nibble:
+        ; b = (len & 1 ? b >> 4 : *data++)
+        swap    b
+        sbrs    len, 0
+        ld      b, X+
+        ; index = (crc ^ b) & 0x0f
+        mov     ZL, crc_l
+        eor     ZL, b
+        andi    ZL, 0x0f
+        ; crc >>= 4
+        swap    crc_h
+        swap    crc_l
+        andi    crc_l, 0x0f
+        mov     tmp, crc_h
+        andi    tmp, 0xf0
+        or      crc_l, tmp
+        andi    crc_h, 0x0f
+        ; crc ^= crc4tab[index]
+        add     ZL, zl
+        lpm     tmp, Z+
+        eor     crc_h, tmp
+        andi    tmp, 1
+        eor     crc_h, tmp
+        eor     crc_l, tmp
+        ; next nibble
+        dec     len
+        brne    next_nibble
+done:
+        ; crc ^= 0xffff
+        com     crc_l
+        com     crc_h
+        ; append crc to buffer
+        st      X+, crc_l
+        st      X+, crc_h
+        ret
+; ----------------------------------------------------------------------
+; CRC table. As bits 1..8 are always zero, omit them.
+; ----------------------------------------------------------------------
+        .section .progmem.crc,"a",@progbits
+;;;     .align  4               ; avoid crossing a page boundary
+crc4tab:
+        .byte   0x00+0x00
+        .byte   0xcc+0x01
+        .byte   0xd8+0x01
+        .byte   0x14+0x00
+        .byte   0xf0+0x01
+        .byte   0x3c+0x00
+        .byte   0x28+0x00
+        .byte   0xe4+0x01
+        .byte   0xa0+0x01
+        .byte   0x6c+0x00
+        .byte   0x78+0x00
+        .byte   0xb4+0x01
+        .byte   0x50+0x00
+        .byte   0x9c+0x01
+        .byte   0x88+0x01
+        .byte   0x44+0x00
+/* ---------------------------------------------------------------------- *\
+#!/usr/bin/python
+for crc in range(16):
+        for bit in range(4):
+                xor = crc & 1
+                crc >>= 1
+                if xor:
+                        crc ^= 0xA001   # X^16 + X^15 + X^2 + 1 (reversed)
+        print "\t.byte\t0x%02x+0x%02x" % (crc >> 8, crc & 0xff)
+\* ---------------------------------------------------------------------- */

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbtiny/def.h
 ,0 → 1,74
+// ======================================================================
+// Common definitions for the USB driver
+//
+// Copyright (C) 2006 Dick Streefland
+//
+// This is free software, licensed under the terms of the GNU General
+// Public License as published by the Free Software Foundation.
+// ======================================================================
+#ifdef __ASSEMBLER__
+#define __SFR_OFFSET            0
+#endif
+#include <avr/io.h>
+#include "usbtiny.h"
+// Preprocessor magic
+#define CAT2(a,b)               CAT2EXP(a, b)
+#define CAT2EXP(a,b)            a ## b
+#define CAT3(a,b,c)             CAT3EXP(a, b, c)
+#define CAT3EXP(a,b,c)          a ## b ## c
+// I/O Ports
+#define USB_IN                  CAT2(PIN, USBTINY_PORT)
+#define USB_OUT                 CAT2(PORT, USBTINY_PORT)
+#define USB_DDR                 CAT2(DDR, USBTINY_PORT)
+// I/O bit masks
+#define USB_MASK_DMINUS         (1 << (USBTINY_DMINUS))
+#define USB_MASK_DPLUS          (1 << (USBTINY_DPLUS))
+#define USB_MASK                (USB_MASK_DMINUS | USB_MASK_DPLUS)
+// Interrupt configuration
+#if     defined EICRA
+#  define USB_INT_CONFIG        EICRA
+#else
+#  define USB_INT_CONFIG        MCUCR
+#endif
+#define USB_INT_CONFIG_SET      ((1 << CAT3(ISC,USBTINY_INT,1)) | (1 << CAT3(ISC,USBTINY_INT,0)))
+#if     defined SIG_INT0
+#  define USB_INT_VECTOR        CAT2(SIG_INT, USBTINY_INT)
+#else
+#  define USB_INT_VECTOR        CAT2(SIG_INTERRUPT, USBTINY_INT)
+#endif
+// Interrupt enable
+#if     defined GIMSK
+#  define USB_INT_ENABLE        GIMSK
+#elif   defined EIMSK
+#  define USB_INT_ENABLE        EIMSK
+#else
+#  define USB_INT_ENABLE        GICR
+#endif
+#define USB_INT_ENABLE_BIT      CAT2(INT,USBTINY_INT)
+// Interrupt pending bit
+#if     defined EIFR
+#  define USB_INT_PENDING       EIFR
+#else
+#  define USB_INT_PENDING       GIFR
+#endif
+#define USB_INT_PENDING_BIT     CAT2(INTF,USBTINY_INT)
+// USB PID values
+#define USB_PID_SETUP           0x2d
+#define USB_PID_OUT             0xe1
+#define USB_PID_IN              0x69
+#define USB_PID_DATA0           0xc3
+#define USB_PID_DATA1           0x4b
+#define USB_PID_ACK             0xd2
+#define USB_PID_NAK             0x5a
+#define USB_PID_STALL           0x1e
+// Various constants
+#define USB_BUFSIZE             11      // PID + data + CRC

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbtiny/int.S
 ,0 → 1,562
+; ======================================================================
+; USB interrupt handler
+;
+; This is the handler for the interrupt caused by the initial rising edge
+; on the D+ USB signal. The NRZI encoding and bit stuffing are removed,
+; and the packet is saved in one of the two input buffers. In some cases,
+; a reply packet is sent right away.
+;
+; When a DATA0/DATA1 packet directly follows a SETUP or OUT packet, while
+; this interrupt handler is not yet finished, there would be no time to
+; return and take another interrupt. In that case, the second packet is
+; decoded directly in the same invocation.
+;
+; This code is *extremely* time critical. For instance, there is not a
+; single spare cycle in the receiver loop, and only two in the transmitter
+; loop. In addition, the various code paths are laid out in such a way that
+; the various USB timeouts are not violated, in particular the maximum time
+; between the reception of a packet and the reply, which is 6.5 bit times
+; for a detachable cable (TRSPIPD1), and 7.5 bit times for a captive cable
+; (TRSPIPD2). The worst-case delay here is 51 cycles, which is just below
+; the 52 cycles for a detachable cable.
+;
+; The interrupt handler must be reached within 34 cycles after D+ goes high
+; for the first time, so the interrupts should not be disabled for longer
+; than 34-4-2=28 cycles.
+;
+; The end-of-packet (EOP) is sampled in the second bit, because the USB
+; standard allows the EOP to be delayed by up to one bit. As the EOP
+; duration is two bits, this is not a problem.
+;
+; Stack usage including the return address: 11 bytes.
+;
+; Copyright (C) 2006 Dick Streefland
+;
+; This is free software, licensed under the terms of the GNU General
+; Public License as published by the Free Software Foundation.
+; ======================================================================
+#include "def.h"
+; ----------------------------------------------------------------------
+; local data
+; ----------------------------------------------------------------------
+        .data
+tx_ack: .byte   USB_PID_ACK             ; ACK packet
+tx_nak: .byte   USB_PID_NAK             ; NAK packet
+        .lcomm  token_pid, 1            ; PID of most recent token packet
+; ----------------------------------------------------------------------
+; register definitions
+; ----------------------------------------------------------------------
+// receiver:
+#define count           r16
+#define usbmask         r17
+#define odd             r18
+#define byte            r19
+#define fixup           r20
+#define even            r22
+// transmitter:
+#define output          odd
+#define done            fixup
+#define next            even
+// control:
+#define pid             odd
+#define addr            usbmask
+#define tmp             fixup
+#define nop2            rjmp    .+0     // not .+2 for some strange reason
+; ----------------------------------------------------------------------
+; interrupt handler
+; ----------------------------------------------------------------------
+        .text
+        .global USB_INT_VECTOR
+        .type   USB_INT_VECTOR, @function
+; ----------------------------------------------------------------------
+; This handler must be reached no later than 34 cycles after D+ goes high
+; for the first time.
+; ----------------------------------------------------------------------
+USB_INT_VECTOR:
+        ; save registers
+        push    count
+        push    usbmask
+        push    odd
+        push    YH
+        push    YL
+        in      count, SREG
+        push    count
+; ----------------------------------------------------------------------
+; Synchronize to the pattern 10101011 on D+. This code must be reached
+; no later than 47 cycles after D+ goes high for the first time.
+; ----------------------------------------------------------------------
+sync:
+        ; wait until D+ == 0
+        sbic    USB_IN, USBTINY_DPLUS
+        rjmp    sync                    ; jump if D+ == 1
+resync:
+        ; sync on 0-->1 transition on D+ with a 2 cycle resolution
+        sbic    USB_IN, USBTINY_DPLUS
+        rjmp    sync6                   ; jump if D+ == 1
+        sbic    USB_IN, USBTINY_DPLUS
+        rjmp    sync6                   ; jump if D+ == 1
+        sbic    USB_IN, USBTINY_DPLUS
+        rjmp    sync6                   ; jump if D+ == 1
+        sbic    USB_IN, USBTINY_DPLUS
+        rjmp    sync6                   ; jump if D+ == 1
+        sbic    USB_IN, USBTINY_DPLUS
+        rjmp    sync6                   ; jump if D+ == 1
+        ldi     count, 1<<USB_INT_PENDING_BIT
+        out     USB_INT_PENDING, count
+        rjmp    return                  ; ==> false start, bail out
+sync6:
+        ; we are now between -1 and +1 cycle from the center of the bit
+        ; following the 0-->1 transition
+        lds     YL, usb_rx_off
+        clr     YH
+        subi    YL, lo8(-(usb_rx_buf))  ; Y = & usb_rx_buf[usb_rx_off]
+        sbci    YH, hi8(-(usb_rx_buf))
+        ldi     count, USB_BUFSIZE      ; limit on number of bytes to receive
+        ldi     usbmask, USB_MASK       ; why is there no eori instruction?
+        ldi     odd, USB_MASK_DPLUS
+sync7:
+        ; the last sync bit should also be 1
+        sbis    USB_IN, USBTINY_DPLUS   ; bit 7 of sync byte?
+        rjmp    resync                  ; no, wait for next transition
+        push    byte
+        push    fixup
+        push    even
+; ----------------------------------------------------------------------
+; receiver loop
+; ----------------------------------------------------------------------
+        in      even, USB_IN            ; sample bit 0
+        ldi     byte, 0x80              ; load sync byte for correct unstuffing
+        rjmp    rxentry                 ; 2 cycles
+rxloop:
+        in      even, USB_IN            ; sample bit 0
+        or      fixup, byte
+        st      Y+, fixup               ; 2 cycles
+rxentry:
+        clr     fixup
+        andi    even, USB_MASK
+        eor     odd, even
+        subi    odd, 1
+        in      odd, USB_IN             ; sample bit 1
+        andi    odd, USB_MASK
+        breq    eop                     ; ==> EOP detected
+        ror     byte
+        cpi     byte, 0xfc
+        brcc    skip0
+skipped0:
+        eor     even, odd
+        subi    even, 1
+        in      even, USB_IN            ; sample bit 2
+        andi    even, USB_MASK
+        ror     byte
+        cpi     byte, 0xfc
+        brcc    skip1
+skipped1:
+        eor     odd, even
+        subi    odd, 1
+        ror     byte
+        in      odd, USB_IN             ; sample bit 3
+        andi    odd, USB_MASK
+        cpi     byte, 0xfc
+        brcc    skip2
+        eor     even, odd
+        subi    even, 1
+        ror     byte
+skipped2:
+        cpi     byte, 0xfc
+        in      even, USB_IN            ; sample bit 4
+        andi    even, USB_MASK
+        brcc    skip3
+        eor     odd, even
+        subi    odd, 1
+        ror     byte
+skipped4:
+        cpi     byte, 0xfc
+skipped3:
+        brcc    skip4
+        in      odd, USB_IN             ; sample bit 5
+        andi    odd, USB_MASK
+        eor     even, odd
+        subi    even, 1
+        ror     byte
+skipped5:
+        cpi     byte, 0xfc
+        brcc    skip5
+        dec     count
+        in      even, USB_IN            ; sample bit 6
+        brmi    overflow                ; ==> overflow
+        andi    even, USB_MASK
+        eor     odd, even
+        subi    odd, 1
+        ror     byte
+skipped6:
+        cpi     byte, 0xfc
+        brcc    skip6
+        in      odd, USB_IN             ; sample bit 7
+        andi    odd, USB_MASK
+        eor     even, odd
+        subi    even, 1
+        ror     byte
+        cpi     byte, 0xfc
+        brcs    rxloop                  ; 2 cycles
+        rjmp    skip7
+eop:
+        rjmp    eop2
+overflow:
+        rjmp    ignore
+; ----------------------------------------------------------------------
+; out-of-line code to skip stuffing bits
+; ----------------------------------------------------------------------
+skip0:                                  ; 1+6 cycles
+        eor     even, usbmask
+        in      odd, USB_IN             ; resample bit 1
+        andi    odd, USB_MASK
+        cbr     byte, (1<<7)
+        sbr     fixup, (1<<0)
+        rjmp    skipped0
+skip1:                                  ; 2+5 cycles
+        cbr     byte, (1<<7)
+        sbr     fixup, (1<<1)
+        in      even, USB_IN            ; resample bit 2
+        andi    even, USB_MASK
+        eor     odd, usbmask
+        rjmp    skipped1
+skip2:                                  ; 3+7 cycles
+        cbr     byte, (1<<7)
+        sbr     fixup, (1<<2)
+        eor     even, usbmask
+        in      odd, USB_IN             ; resample bit 3
+        andi    odd, USB_MASK
+        eor     even, odd
+        subi    even, 1
+        ror     byte
+        rjmp    skipped2
+skip3:                                  ; 4+7 cycles
+        cbr     byte, (1<<7)
+        sbr     fixup, (1<<3)
+        eor     odd, usbmask
+        ori     byte, 1
+        in      even, USB_IN            ; resample bit 4
+        andi    even, USB_MASK
+        eor     odd, even
+        subi    odd, 1
+        ror     byte
+        rjmp    skipped3
+skip4:                                  ; 5 cycles
+        cbr     byte, (1<<7)
+        sbr     fixup, (1<<4)
+        eor     even, usbmask
+        rjmp    skipped4
+skip5:                                  ; 5 cycles
+        cbr     byte, (1<<7)
+        sbr     fixup, (1<<5)
+        eor     odd, usbmask
+        rjmp    skipped5
+skip6:                                  ; 5 cycles
+        cbr     byte, (1<<7)
+        sbr     fixup, (1<<6)
+        eor     even, usbmask
+        rjmp    skipped6
+skip7:                                  ; 7 cycles
+        cbr     byte, (1<<7)
+        sbr     fixup, (1<<7)
+        eor     odd, usbmask
+        nop2
+        rjmp    rxloop
+; ----------------------------------------------------------------------
+; end-of-packet detected (worst-case: 3 cycles after end of SE0)
+; ----------------------------------------------------------------------
+eop2:
+        ; clear pending interrupt (SE0+3)
+        ldi     byte, 1<<USB_INT_PENDING_BIT
+        out     USB_INT_PENDING, byte   ; clear pending bit at end of packet
+        ; ignore packets shorter than 3 bytes
+        subi    count, USB_BUFSIZE
+        neg     count                   ; count = packet length
+        cpi     count, 3
+        brlo    ignore
+        ; get PID
+        sub     YL, count
+        ld      pid, Y
+        ; check for DATA0/DATA1 first, as this is the critical path (SE0+12)
+        cpi     pid, USB_PID_DATA0
+        breq    is_data                 ; handle DATA0 packet
+        cpi     pid, USB_PID_DATA1
+        breq    is_data                 ; handle DATA1 packet
+        ; check ADDR (SE0+16)
+        ldd     addr, Y+1
+        andi    addr, 0x7f
+        lds     tmp, usb_address
+        cp      addr, tmp               ; is this packet for me?
+        brne    ignore                  ; no, ignore
+        ; check for other PIDs (SE0+23)
+        cpi     pid, USB_PID_IN
+        breq    is_in                   ; handle IN packet
+        cpi     pid, USB_PID_SETUP
+        breq    is_setup_out            ; handle SETUP packet
+        cpi     pid, USB_PID_OUT
+        breq    is_setup_out            ; handle OUT packet
+; ----------------------------------------------------------------------
+; exit point for ignored packets
+; ----------------------------------------------------------------------
+ignore:
+        clr     tmp
+        sts     token_pid, tmp
+        pop     even
+        pop     fixup
+        pop     byte
+        rjmp    return
+; ----------------------------------------------------------------------
+; Handle SETUP/OUT (SE0+30)
+; ----------------------------------------------------------------------
+is_setup_out:
+        sts     token_pid, pid          ; save PID of token packet
+        pop     even
+        pop     fixup
+        pop     byte
+        in      count, USB_INT_PENDING  ; next packet already started?
+        sbrc    count, USB_INT_PENDING_BIT
+        rjmp    sync                    ; yes, get it right away (SE0+42)
+; ----------------------------------------------------------------------
+; restore registers and return from interrupt
+; ----------------------------------------------------------------------
+return:
+        pop     count
+        out     SREG, count
+        pop     YL
+        pop     YH
+        pop     odd
+        pop     usbmask
+        pop     count
+        reti
+; ----------------------------------------------------------------------
+; Handle IN (SE0+26)
+; ----------------------------------------------------------------------
+is_in:
+        lds     count, usb_tx_len
+        tst     count                   ; data ready?
+        breq    nak                     ; no, reply with NAK
+        lds     tmp, usb_rx_len
+        tst     tmp                     ; unprocessed input packet?
+        brne    nak                     ; yes, don't send old data for new packet
+        sts     usb_tx_len, tmp         ; buffer is available again (after reti)
+        ldi     YL, lo8(usb_tx_buf)
+        ldi     YH, hi8(usb_tx_buf)
+        rjmp    send_packet             ; SE0+40, SE0 --> SOP <= 51
+; ----------------------------------------------------------------------
+; Handle DATA0/DATA1 (SE0+17)
+; ----------------------------------------------------------------------
+is_data:
+        lds     pid, token_pid
+        tst     pid                     ; data following our SETUP/OUT
+        breq    ignore                  ; no, ignore
+        lds     tmp, usb_rx_len
+        tst     tmp                     ; buffer free?
+        brne    nak                     ; no, reply with NAK
+        sts     usb_rx_len, count       ; pass buffer length
+        sts     usb_rx_token, pid       ; pass PID of token (SETUP or OUT)
+        lds     count, usb_rx_off       ; switch to other input buffer
+        ldi     tmp, USB_BUFSIZE
+        sub     tmp, count
+        sts     usb_rx_off, tmp
+; ----------------------------------------------------------------------
+; send ACK packet (SE0+35)
+; ----------------------------------------------------------------------
+ack:
+        ldi     YL, lo8(tx_ack)
+        ldi     YH, hi8(tx_ack)
+        rjmp    send_token
+; ----------------------------------------------------------------------
+; send NAK packet (SE0+36)
+; ----------------------------------------------------------------------
+nak:
+        ldi     YL, lo8(tx_nak)
+        ldi     YH, hi8(tx_nak)
+send_token:
+        ldi     count, 1                ; SE0+40, SE0 --> SOP <= 51
+; ----------------------------------------------------------------------
+; acquire the bus and send a packet (11 cycles to SOP)
+; ----------------------------------------------------------------------
+send_packet:
+        in      output, USB_OUT
+        cbr     output, USB_MASK
+        ori     output, USB_MASK_DMINUS
+        in      usbmask, USB_DDR
+        ori     usbmask, USB_MASK
+        out     USB_OUT, output         ; idle state
+        out     USB_DDR, usbmask        ; acquire bus
+        ldi     usbmask, USB_MASK
+        ldi     byte, 0x80              ; start with sync byte
+; ----------------------------------------------------------------------
+; transmitter loop
+; ----------------------------------------------------------------------
+txloop:
+        sbrs    byte, 0
+        eor     output, usbmask
+        out     USB_OUT, output         ; output bit 0
+        ror     byte
+        ror     done
+stuffed0:
+        cpi     done, 0xfc
+        brcc    stuff0
+        sbrs    byte, 0
+        eor     output, usbmask
+        ror     byte
+stuffed1:
+        out     USB_OUT, output         ; output bit 1
+        ror     done
+        cpi     done, 0xfc
+        brcc    stuff1
+        sbrs    byte, 0
+        eor     output, usbmask
+        ror     byte
+        nop
+stuffed2:
+        out     USB_OUT, output         ; output bit 2
+        ror     done
+        cpi     done, 0xfc
+        brcc    stuff2
+        sbrs    byte, 0
+        eor     output, usbmask
+        ror     byte
+        nop
+stuffed3:
+        out     USB_OUT, output         ; output bit 3
+        ror     done
+        cpi     done, 0xfc
+        brcc    stuff3
+        sbrs    byte, 0
+        eor     output, usbmask
+        ld      next, Y+                ; 2 cycles
+        out     USB_OUT, output         ; output bit 4
+        ror     byte
+        ror     done
+stuffed4:
+        cpi     done, 0xfc
+        brcc    stuff4
+        sbrs    byte, 0
+        eor     output, usbmask
+        ror     byte
+stuffed5:
+        out     USB_OUT, output         ; output bit 5
+        ror     done
+        cpi     done, 0xfc
+        brcc    stuff5
+        sbrs    byte, 0
+        eor     output, usbmask
+        ror     byte
+stuffed6:
+        ror     done
+        out     USB_OUT, output         ; output bit 6
+        cpi     done, 0xfc
+        brcc    stuff6
+        sbrs    byte, 0
+        eor     output, usbmask
+        ror     byte
+        mov     byte, next
+stuffed7:
+        ror     done
+        out     USB_OUT, output         ; output bit 7
+        cpi     done, 0xfc
+        brcc    stuff7
+        dec     count
+        brpl    txloop                  ; 2 cycles
+        rjmp    gen_eop
+; ----------------------------------------------------------------------
+; out-of-line code to insert stuffing bits
+; ----------------------------------------------------------------------
+stuff0:                                 ; 2+3
+        eor     output, usbmask
+        clr     done
+        out     USB_OUT, output
+        rjmp    stuffed0
+stuff1:                                 ; 3
+        eor     output, usbmask
+        rjmp    stuffed1
+stuff2:                                 ; 3
+        eor     output, usbmask
+        rjmp    stuffed2
+stuff3:                                 ; 3
+        eor     output, usbmask
+        rjmp    stuffed3
+stuff4:                                 ; 2+3
+        eor     output, usbmask
+        clr     done
+        out     USB_OUT, output
+        rjmp    stuffed4
+stuff5:                                 ; 3
+        eor     output, usbmask
+        rjmp    stuffed5
+stuff6:                                 ; 3
+        eor     output, usbmask
+        rjmp    stuffed6
+stuff7:                                 ; 3
+        eor     output, usbmask
+        rjmp    stuffed7
+; ----------------------------------------------------------------------
+; generate EOP, release the bus, and return from interrupt
+; ----------------------------------------------------------------------
+gen_eop:
+        cbr     output, USB_MASK
+        out     USB_OUT, output         ; output SE0 for 2 bit times
+        pop     even
+        pop     fixup
+        pop     byte
+        ldi     count, 1<<USB_INT_PENDING_BIT
+        out     USB_INT_PENDING, count  ; interrupt was triggered by transmit
+        pop     YH                      ; this is the saved SREG
+        pop     YL
+        in      usbmask, USB_DDR
+        mov     count, output
+        ori     output, USB_MASK_DMINUS
+        out     USB_OUT, output         ; output J state for 1 bit time
+        cbr     usbmask, USB_MASK
+        out     SREG, YH
+        pop     YH
+        pop     odd                     ; is the same register as output!
+        nop
+        out     USB_DDR, usbmask        ; release bus
+        out     USB_OUT, count          ; disable D- pullup
+        pop     usbmask
+        pop     count
+        reti

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbtiny/usb.c
 ,0 → 1,418
+// ======================================================================
+// USB driver
+//
+// Entry points:
+//      usb_init()      - enable the USB interrupt
+//      usb_poll()      - poll for incoming packets and process them
+//
+// This code communicates with the interrupt handler through a number of
+// global variables, including two input buffers and one output buffer.
+// Packets are queued for transmission by copying them into the output
+// buffer. The interrupt handler will transmit such a packet on the
+// reception of an IN packet.
+//
+// Standard SETUP packets are handled here. Non-standard SETUP packets
+// are forwarded to the application code by calling usb_setup(). The
+// macros USBTINY_CALLBACK_IN and USBTINY_CALLBACK_OUT control whether
+// the callback functions usb_in() and usb_out() will be called for IN
+// and OUT transfers.
+//
+// Maximum stack usage (gcc 3.4.3 & 4.1.0) of usb_poll(): 5 bytes plus
+// possible additional stack usage in usb_setup(), usb_in() or usb_out().
+//
+// Copyright (C) 2006 Dick Streefland
+//
+// This is free software, licensed under the terms of the GNU General
+// Public License as published by the Free Software Foundation.
+// ======================================================================
+#include <avr/pgmspace.h>
+#include <avr/interrupt.h>
+#include "def.h"
+#include "usb.h"
+#define LE(word)                        (word) & 0xff, (word) >> 8
+// ----------------------------------------------------------------------
+// USB constants
+// ----------------------------------------------------------------------
+enum
+{
+        DESCRIPTOR_TYPE_DEVICE = 1,
+        DESCRIPTOR_TYPE_CONFIGURATION,
+        DESCRIPTOR_TYPE_STRING,
+        DESCRIPTOR_TYPE_INTERFACE,
+        DESCRIPTOR_TYPE_ENDPOINT,
+};
+// ----------------------------------------------------------------------
+// Interrupt handler interface
+// ----------------------------------------------------------------------
+byte_t  usb_rx_buf[2*USB_BUFSIZE];      // two input buffers
+byte_t  usb_rx_off;                     // buffer offset: 0 or USB_BUFSIZE
+byte_t  usb_rx_len;                     // buffer size, 0 means empty
+byte_t  usb_rx_token;                   // PID of token packet: SETUP or OUT
+byte_t  usb_tx_buf[USB_BUFSIZE];        // output buffer
+byte_t  usb_tx_len;                     // output buffer size, 0 means empty
+byte_t  usb_address;                    // assigned USB address
+// ----------------------------------------------------------------------
+// Local data
+// ----------------------------------------------------------------------
+enum
+{
+        TX_STATE_IDLE = 0,              // transmitter idle
+        TX_STATE_RAM,                   // usb_tx_data is a RAM address
+        TX_STATE_ROM,                   // usb_tx_data is a ROM address
+        TX_STATE_CALLBACK,              // call usb_in() to obtain transmit data
+};
+static  byte_t  usb_tx_state;           // TX_STATE_*, see enum above
+static  byte_t  usb_tx_total;           // total transmit size
+static  byte_t* usb_tx_data;            // pointer to data to transmit
+static  byte_t  new_address;            // new device address
+#if     defined USBTINY_VENDOR_NAME
+struct
+{
+        byte_t  length;
+        byte_t  type;
+        int     string[sizeof(USBTINY_VENDOR_NAME)-1];
+}       string_vendor PROGMEM =
+{
+* sizeof(USBTINY_VENDOR_NAME),
+        DESCRIPTOR_TYPE_STRING,
+        { CAT2(L, USBTINY_VENDOR_NAME) }
+};
+#  define       VENDOR_NAME_ID  1
+#else
+#  define       VENDOR_NAME_ID  0
+#endif
+#if     defined USBTINY_DEVICE_NAME
+struct
+{
+        byte_t  length;
+        byte_t  type;
+        int     string[sizeof(USBTINY_DEVICE_NAME)-1];
+}       string_device PROGMEM =
+{
+* sizeof(USBTINY_DEVICE_NAME),
+        DESCRIPTOR_TYPE_STRING,
+        { CAT2(L, USBTINY_DEVICE_NAME) }
+};
+#  define       DEVICE_NAME_ID  2
+#else
+#  define       DEVICE_NAME_ID  0
+#endif
+#if     defined USBTINY_SERIAL
+struct
+{
+        byte_t  length;
+        byte_t  type;
+        int     string[sizeof(USBTINY_SERIAL)-1];
+}       string_serial PROGMEM =
+{
+* sizeof(USBTINY_SERIAL),
+        DESCRIPTOR_TYPE_STRING,
+        { CAT2(L, USBTINY_SERIAL) }
+};
+#  define       SERIAL_ID       3
+#else
+#  define       SERIAL_ID       0
+#endif
+#if     VENDOR_NAME_ID || DEVICE_NAME_ID || SERIAL_ID
+static  byte_t  string_langid [] PROGMEM =
+{
+,                              // bLength
+        DESCRIPTOR_TYPE_STRING,         // bDescriptorType (string)
+        LE(0x0409),                     // wLANGID[0] (American English)
+};
+#endif
+// Device Descriptor
+static  byte_t  descr_device [18] PROGMEM =
+{
+,                             // bLength
+        DESCRIPTOR_TYPE_DEVICE,         // bDescriptorType
+        LE(0x0110),                     // bcdUSB
+        USBTINY_DEVICE_CLASS,           // bDeviceClass
+        USBTINY_DEVICE_SUBCLASS,        // bDeviceSubClass
+        USBTINY_DEVICE_PROTOCOL,        // bDeviceProtocol
+,                              // bMaxPacketSize0
+        LE(USBTINY_VENDOR_ID),          // idVendor
+        LE(USBTINY_DEVICE_ID),          // idProduct
+        LE(USBTINY_DEVICE_VERSION),     // bcdDevice
+        VENDOR_NAME_ID,                 // iManufacturer
+        DEVICE_NAME_ID,                 // iProduct
+        SERIAL_ID,                      // iSerialNumber
+,                              // bNumConfigurations
+};
+// Configuration Descriptor
+static  byte_t  descr_config [] PROGMEM =
+{
+,                              // bLength
+        DESCRIPTOR_TYPE_CONFIGURATION,  // bDescriptorType
+        LE(9+9+7*USBTINY_ENDPOINT),     // wTotalLength
+,                              // bNumInterfaces
+,                              // bConfigurationValue
+,                              // iConfiguration
+        (USBTINY_MAX_POWER ? 0x80 : 0xc0), // bmAttributes
+        (USBTINY_MAX_POWER + 1) / 2,    // MaxPower
+        // Standard Interface Descriptor
+,                              // bLength
+        DESCRIPTOR_TYPE_INTERFACE,      // bDescriptorType
+,                              // bInterfaceNumber
+,                              // bAlternateSetting
+        USBTINY_ENDPOINT,               // bNumEndpoints
+        USBTINY_INTERFACE_CLASS,        // bInterfaceClass
+        USBTINY_INTERFACE_SUBCLASS,     // bInterfaceSubClass
+        USBTINY_INTERFACE_PROTOCOL,     // bInterfaceProtocol
+,                              // iInterface
+#if     USBTINY_ENDPOINT
+        // Additional Endpoint
+,                              // bLength
+        DESCRIPTOR_TYPE_ENDPOINT,       // bDescriptorType
+        USBTINY_ENDPOINT_ADDRESS,       // bEndpointAddress
+        USBTINY_ENDPOINT_TYPE,          // bmAttributes
+        LE(8),                          // wMaxPacketSize
+        USBTINY_ENDPOINT_INTERVAL,      // bInterval
+#endif
+};
+// ----------------------------------------------------------------------
+// Inspect an incoming packet.
+// ----------------------------------------------------------------------
+static  void    usb_receive ( byte_t* data, byte_t rx_len )
+{
+        byte_t  len;
+        byte_t  type;
+        byte_t  limit;
+        usb_tx_state = TX_STATE_RAM;
+        len = 0;
+        if      ( usb_rx_token == USB_PID_SETUP )
+        {
+                limit = data[6];
+                if      ( data[7] )
+                {
+                        limit = 255;
+                }
+                type = data[0] & 0x60;
+                if      ( type == 0x00 )
+                {       // Standard request
+                        if      ( data[1] == 0 )        // GET_STATUS
+                        {
+                                len = 2;
+#if     USBTINY_MAX_POWER == 0
+                                data[0] = (data[0] == 0x80);
+#else
+                                data[0] = 0;
+#endif
+                                data[1] = 0;
+                        }
+                        else if ( data[1] == 5 )        // SET_ADDRESS
+                        {
+                                new_address = data[2];
+                        }
+                        else if ( data[1] == 6 )        // GET_DESCRIPTOR
+                        {
+                                usb_tx_state = TX_STATE_ROM;
+                                if      ( data[3] == 1 )
+                                {       // DEVICE
+                                        data = (byte_t*) &descr_device;
+                                        len = sizeof(descr_device);
+                                }
+                                else if ( data[3] == 2 )
+                                {       // CONFIGURATION
+                                        data = (byte_t*) &descr_config;
+                                        len = sizeof(descr_config);
+                                }
+#if     VENDOR_NAME_ID || DEVICE_NAME_ID || SERIAL_ID
+                                else if ( data[3] == 3 )
+                                {       // STRING
+                                        if      ( data[2] == 0 )
+                                        {
+                                                data = (byte_t*) &string_langid;
+                                                len = sizeof(string_langid);
+                                        }
+#if     VENDOR_NAME_ID
+                                        else if ( data[2] == VENDOR_NAME_ID )
+                                        {
+                                                data = (byte_t*) &string_vendor;
+                                                len = sizeof(string_vendor);
+                                        }
+#endif
+#if     DEVICE_NAME_ID
+                                        else if ( data[2] == DEVICE_NAME_ID )
+                                        {
+                                                data = (byte_t*) &string_device;
+                                                len = sizeof(string_device);
+                                        }
+#endif
+#if     SERIAL_ID
+                                        else if ( data[2] == SERIAL_ID )
+                                        {
+                                                data = (byte_t*) &string_serial;
+                                                len = sizeof(string_serial);
+                                        }
+#endif
+                                }
+#endif
+                        }
+                        else if ( data[1] == 8 )        // GET_CONFIGURATION
+                        {
+                                data[0] = 1;            // return bConfigurationValue
+                                len = 1;
+                        }
+                        else if ( data[1] == 10 )       // GET_INTERFACE
+                        {
+                                data[0] = 0;
+                                len = 1;
+                        }
+                }
+                else
+                {       // Class or Vendor request
+                        len = usb_setup( data );
+#if     USBTINY_CALLBACK_IN
+                        if      ( len == 0xff )
+                        {
+                                usb_tx_state = TX_STATE_CALLBACK;
+                        }
+#endif
+                }
+                if      ( len > limit )
+                {
+                        len = limit;
+                }
+                usb_tx_data = data;
+        }
+#if     USBTINY_CALLBACK_OUT
+        else if ( rx_len > 0 )
+        {       // usb_rx_token == USB_PID_OUT
+                usb_out( data, rx_len );
+        }
+#endif
+        usb_tx_total  = len;
+        usb_tx_buf[0] = USB_PID_DATA0;  // next data packet will be DATA1
+}
+// ----------------------------------------------------------------------
+// Load the transmit buffer with the next packet.
+// ----------------------------------------------------------------------
+static  void    usb_transmit ( void )
+{
+        byte_t  len;
+        byte_t* src;
+        byte_t* dst;
+        byte_t  i;
+        byte_t  b;
+        usb_tx_buf[0] ^= (USB_PID_DATA0 ^ USB_PID_DATA1);
+        len = usb_tx_total;
+        if      ( len > 8 )
+        {
+                len = 8;
+        }
+        dst = usb_tx_buf + 1;
+        if      ( len > 0 )
+        {
+#if     USBTINY_CALLBACK_IN
+                if      ( usb_tx_state == TX_STATE_CALLBACK )
+                {
+                        len = usb_in( dst, len );
+                }
+                else
+#endif
+                {
+                        src = usb_tx_data;
+                        if      ( usb_tx_state == TX_STATE_RAM )
+                        {
+                                for     ( i = 0; i < len; i++ )
+                                {
+                                        *dst++ = *src++;
+                                }
+                        }
+                        else    // usb_tx_state == TX_STATE_ROM
+                        {
+                                for     ( i = 0; i < len; i++ )
+                                {
+                                        b = pgm_read_byte( src );
+                                        src++;
+                                        *dst++ = b;
+                                }
+                        }
+                        usb_tx_data = src;
+                }
+                usb_tx_total -= len;
+        }
+        crc( usb_tx_buf + 1, len );
+        usb_tx_len = len + 3;
+        if      ( len < 8 )
+        {       // this is the last packet
+                usb_tx_state = TX_STATE_IDLE;
+        }
+}
+// ----------------------------------------------------------------------
+// Initialize the low-level USB driver.
+// ----------------------------------------------------------------------
+extern  void    usb_init ( void )
+{
+        USB_INT_CONFIG |= USB_INT_CONFIG_SET;
+        USB_INT_ENABLE |= (1 << USB_INT_ENABLE_BIT);
+        sei();
+}
+// ----------------------------------------------------------------------
+// Poll USB driver:
+// - check for incoming USB packets
+// - refill an empty transmit buffer
+// - check for USB bus reset
+// ----------------------------------------------------------------------
+extern  void    usb_poll ( void )
+{
+        byte_t  i;
+        // check for incoming USB packets
+        if      ( usb_rx_len != 0 )
+        {
+                usb_receive( usb_rx_buf + USB_BUFSIZE - usb_rx_off + 1, usb_rx_len - 3 );
+                usb_tx_len = 0; // abort pending transmission
+                usb_rx_len = 0; // accept next packet
+        }
+        // refill an empty transmit buffer, when the transmitter is active
+        if      ( usb_tx_len == 0 )
+        {
+                if      ( usb_tx_state != TX_STATE_IDLE )
+                {
+                        usb_transmit();
+                }
+                else
+                {       // change the USB address at the end of a transfer
+                        usb_address = new_address;
+                }
+        }
+        // check for USB bus reset
+        for     ( i = 10; i > 0 && ! (USB_IN & USB_MASK_DMINUS); i-- )
+        {
+        }
+        if      ( i == 0 )
+        {       // SE0 for more than 2.5uS is a reset
+                 cli();
+                 usb_tx_len=0;
+                 usb_rx_len=0;
+                 new_address = 0;
+                 sei();
+        }
+}

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbtiny/usb.h
 ,0 → 1,28
+// ======================================================================
+// Public interface of the USB driver
+//
+// Copyright (C) 2006 Dick Streefland
+//
+// This is free software, licensed under the terms of the GNU General
+// Public License as published by the Free Software Foundation.
+// ======================================================================
+#ifndef USB_H
+#define USB_H
+typedef unsigned char   byte_t;
+typedef unsigned int    uint_t;
+// usb.c
+extern  void            usb_init ( void );
+extern  void            usb_poll ( void );
+// crc.S
+extern  void            crc ( byte_t* data, byte_t len );
+// application callback functions
+extern  byte_t          usb_setup ( byte_t data[8] );
+extern  void            usb_out ( byte_t* data, byte_t len );
+extern  byte_t          usb_in ( byte_t* data, byte_t len );
+#endif  // USB_H

 //Designs/Tools/i2c_AVR_USB/SW/firmware/usbtiny.h
 ,0 → 1,83
+// ======================================================================
+// USBtiny Configuration
+//
+// Copyright (C) 2006 Dick Streefland
+//
+// This is free software, licensed under the terms of the GNU General
+// Public License as published by the Free Software Foundation.
+// ======================================================================
+// The D+ and D- USB signals should be connected to two pins of the same
+// I/O port. The following macros define the port letter and the input
+// bit numbers:
+#if! defined (__AVR_ATtiny45__)
+#define USBTINY_PORT                    C
+#define USBTINY_DPLUS                   1
+#define USBTINY_DMINUS                  0
+#else
+#define USBTINY_PORT                    B
+#define USBTINY_DPLUS                   2
+#define USBTINY_DMINUS                  0
+#endif
+// The D+ signal should be connected to an interrupt input to trigger an
+// interrupt at the start of a packet. When you use the same pin for the
+// D+ USB signal and the interrupt input, only two I/O pins are needed
+// for the USB interface. The following macro defines the interrupt
+// number:
+#define USBTINY_INT                     0
+// The power requirement of the USB device in mA, or 0 when the device
+// is not bus powered:
+#define USBTINY_MAX_POWER               10
+// The USB vendor and device IDs. These values should be unique for
+// every distinct device. You can get your own vendor ID from the USB
+// Implementers Forum (www.usb.org) if you have a spare $1500 to kill.
+// Alternatively, you can buy a small range of device IDs from
+// www.voti.nl or www.mecanique.co.uk, or be naughty and use something
+// else, like for instance product ID 0x6666, which is registered as
+// "Prototype product Vendor ID".
+#define USBTINY_VENDOR_ID               0x0403
+#define USBTINY_DEVICE_ID               0xc631
+// The version of the device as a 16-bit number: 256*major + minor.
+#define USBTINY_DEVICE_VERSION          0x205
+// The following optional macros may be used as an identification of
+// your device. Undefine them when you run out of flash space.
+#define USBTINY_VENDOR_NAME             "Till Harbaum"
+#define USBTINY_DEVICE_NAME             "i2c-tiny-usb"
+#undef  USBTINY_SERIAL
+// Define the device class, subclass and protocol. Device class 0xff
+// is "vendor specific".
+#define USBTINY_DEVICE_CLASS            0xff
+#define USBTINY_DEVICE_SUBCLASS         0
+#define USBTINY_DEVICE_PROTOCOL         0
+// Define the interface class, subclass and protocol. Interface class
+// 0xff is "vendor specific".
+#define USBTINY_INTERFACE_CLASS         0xff
+#define USBTINY_INTERFACE_SUBCLASS      0
+#define USBTINY_INTERFACE_PROTOCOL      0
+// Normally, usb_setup() should write the reply of up to 8 bytes into the
+// packet buffer, and return the reply length. When this macro is defined
+// as 1, you have the option of returning 0xff instead. In that case, the
+// USB driver will call a function usb_in() to obtain the data to send
+// back to the host. This can be used to generate the data on-the-fly.
+#define USBTINY_CALLBACK_IN             1
+// When this macro is defined as 0, OUT packets are simply ignored.
+// When defined as 1, the function usb_out() is called for OUT packets.
+// You need this option to send data from the host to the device in
+// a control transfer.
+#define USBTINY_CALLBACK_OUT            1
+// Set the macro USBTINY_ENDPOINT to 1 to add an additional endpoint,
+// according to the values of the three other macros.
+#define USBTINY_ENDPOINT                0
+#define USBTINY_ENDPOINT_ADDRESS        0x81    // IN endpoint #1
+#define USBTINY_ENDPOINT_TYPE           0x00    // control transfer type
+#define USBTINY_ENDPOINT_INTERVAL       0        // ignored

 //Designs/Tools/i2c_AVR_USB/SW/firmware/util/check.py
 ,0 → 1,51
+#!/usr/bin/python
+# ======================================================================
+# check.py - Check section sizes and other constraints
+#
+# Copyright (C) 2006 Dick Streefland
+#
+# This is free software, licensed under the terms of the GNU General
+# Public License as published by the Free Software Foundation.
+# ======================================================================
+import os, sys
+stacksize = 32
+flashsize = 2048
+ramsize   = 128
+if len(sys.argv) > 2:
+        stacksize = int(sys.argv[2])
+if len(sys.argv) > 3:
+        flashsize = int(sys.argv[3])
+if len(sys.argv) > 4:
+        ramsize   = int(sys.argv[4])
+max_sram = ramsize - stacksize
+for line in os.popen('avr-objdump -ht ' + sys.argv[1]).readlines():
+        a = line.split()
+        if len(a) == 7:
+                if a[1] == '.text':
+                        text = int(a[2], 16)
+                if a[1] == '.data':
+                        data = int(a[2], 16)
+                if a[1] == '.bss':
+                        bss = int(a[2], 16)
+        if len(a) == 5 and a[4] == 'crc4tab':
+                crc4tab = int(a[0], 16)
+print 'text: %d, data: %d, bss: %d' % (text, data, bss)
+status = 0
+overflow = text + data - flashsize
+if overflow > 0:
+        print 'ERROR: Flash size limit exceeded by %d bytes.' % overflow
+        status = 1
+overflow = bss + data - max_sram
+if overflow > 0:
+        print 'ERROR: SRAM size limit exceeded by %d bytes.' % overflow
+        status = 1
+if (crc4tab & 0xff) > 0xf0:
+        print 'ERROR: The table crc4tab should not cross a page boundary.'
+        status = 1
+sys.exit(status)
 Property changes:
 Added: svn:executable
 +*
 \ No newline at end of property

 //Designs/Tools/i2c_AVR_USB/SW/testapp/PC/Makefile
 ,0 → 1,18
+#
+# Makefile
+#
+APP = i2c_usb
+all: $(APP)
+clean:
+        rm -f $(APP)
+$(APP): $(APP).c
+        $(CC) -Wall -o $@ $(APP).c -lusb
+install:
+        install $(APP) $(DESTDIR)/usr/bin
+        install i2c_tiny_usb.rules $(DESTDIR)/etc/udev/rules.d
+        install i2c_tiny_usb.desktop $(DESTDIR)/usr/share/applications/hildon

 //Designs/Tools/i2c_AVR_USB/SW/testapp/PC/Makefile.cygwin
 ,0 → 1,15
+#
+# Makefile.cygwin
+#
+APP = i2c_usb
+all: $(APP).exe
+clean:
+        rm -f $(APP).exe
+$(APP).exe: $(APP).c
+        $(CC) -Wall -DWIN -o $@ $(APP).c -lusb

 //Designs/Tools/i2c_AVR_USB/SW/testapp/PC/Makefile.macos
 ,0 → 1,14
+#
+# Makefile
+#
+APP = i2c_usb
+all: $(APP)
+clean:
+        rm -f $(APP)
+$(APP): $(APP).c
+        $(CC) -Wall -I/sw/include -o $@ $(APP).c -L/sw/lib -lusb

 //Designs/Tools/i2c_AVR_USB/SW/testapp/PC/Makefile.mingw
 ,0 → 1,15
+#
+# Makefile.xmingw
+#
+APP = i2c_usb
+all: $(APP).exe
+clean:
+        rm -f $(APP).exe
+$(APP).exe: $(APP).c
+        $(CC) -Wall -mno-cygwin -DWIN -o $@ $(APP).c -lusb

 //Designs/Tools/i2c_AVR_USB/SW/testapp/PC/Makefile.xmingw
 ,0 → 1,19
+#
+# Makefile.xmingw
+#
+XMINGW_ROOT = /usr/local/cross-tools/bin
+CC = $(XMINGW_ROOT)/i386-mingw32msvc-gcc
+APP = i2c_usb
+all: $(APP).exe
+clean:
+        rm -f $(APP).exe
+$(APP).exe: $(APP).c
+        $(CC) -Wall -DWIN -o $@ $(APP).c -lusb

//Designs/Tools/i2c_AVR_USB/SW/testapp/PC/i2c_usb
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream
Property changes:
Added: svn:executable
+*
\ No newline at end of property
Added: svn:mime-type
+application/octet-stream
\ No newline at end of property

 //Designs/Tools/i2c_AVR_USB/SW/testapp/PC/i2c_usb.c
 ,0 → 1,438
+/*
+ * i2c_usb.c - test application for the i2c-tiby-usb interface
+ *             http://www.harbaum.org/till/i2c_tiny_usb
+ *
+ * $Id: i2c_usb.c,v 1.5 2007/01/05 19:30:43 harbaum Exp $
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <usb.h>
+/* ds1621 chip address (A0-A2 tied low) */
+#define DS1621_ADDR  0x48
+/* pcf8574 chip address (A0-A2 tied low) */
+#define PCF8574_ADDR  0x20
+#define LOOPS 100
+#define USB_CTRL_IN    (USB_TYPE_CLASS | USB_ENDPOINT_IN)
+#define USB_CTRL_OUT   (USB_TYPE_CLASS)
+/* the vendor and product id was donated by ftdi ... many thanks!*/
+#define I2C_TINY_USB_VID  0x0403
+#define I2C_TINY_USB_PID  0xc631
+#ifdef WIN
+#include <windows.h>
+#include <winbase.h>
+#define usleep(t) Sleep((t) / 1000)
+#endif
+#define I2C_M_RD                0x01
+/* commands via USB, must e.g. match command ids firmware */
+#define CMD_ECHO       0
+#define CMD_GET_FUNC   1
+#define CMD_SET_DELAY  2
+#define CMD_GET_STATUS 3
+#define CMD_I2C_IO     4
+#define CMD_I2C_BEGIN  1  // flag to I2C_IO
+#define CMD_I2C_END    2  // flag to I2C_IO
+#define STATUS_IDLE          0
+#define STATUS_ADDRESS_ACK   1
+#define STATUS_ADDRESS_NAK   2
+usb_dev_handle      *handle = NULL;
+/* write a set of bytes to the i2c_tiny_usb device */
+int i2c_tiny_usb_write(int request, int value, int index){
+  if(usb_control_msg(handle, USB_CTRL_OUT, request,
+                      value, index, NULL, 0, 1000) < 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  return 1;
+}
+/* read a set of bytes from the i2c_tiny_usb device */
+int i2c_tiny_usb_read(unsigned char cmd, void *data, int len) {
+  int                 nBytes;
+  /* send control request and accept return value */
+  nBytes = usb_control_msg(handle,USB_CTRL_IN, cmd, 0, 0, data, len, 1000);
+  if(nBytes < 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return nBytes;
+  }
+  return 0;
+}
+/* get i2c usb interface test */
+void i2c_tiny_usb_test(void) {
+  unsigned long func;
+  if(i2c_tiny_usb_read(CMD_ECHO, &func, sizeof(func)) == 0)
+    printf("Functionality = %lx\n", func);
+}
+/* get i2c usb interface firmware version */
+void i2c_tiny_usb_get_func(void) {
+  unsigned long func;
+  if(i2c_tiny_usb_read(CMD_GET_FUNC, &func, sizeof(func)) == 0)
+    printf("Functionality = %lx\n", func);
+}
+/* set a value in the I2C_USB interface */
+void i2c_tiny_usb_set(unsigned char cmd, int value) {
+  if(usb_control_msg(handle,
+             USB_TYPE_VENDOR, cmd, value, 0,
+             NULL, 0, 1000) < 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+  }
+}
+/* get the current transaction status from the i2c_tiny_usb interface */
+int i2c_tiny_usb_get_status(void) {
+  int i;
+  unsigned char status;
+  if((i=i2c_tiny_usb_read(CMD_GET_STATUS, &status, sizeof(status))) < 0) {
+    fprintf(stderr, "Error reading status\n");
+    return i;
+  }
+  return status;
+}
+/* write command and read an 8 or 16 bit value from the given chip */
+int i2c_read_with_cmd(unsigned char addr, char cmd, int length) {
+  unsigned char result[2];
+  if((length < 0) || (length > sizeof(result))) {
+    fprintf(stderr, "request exceeds %lu bytes\n", sizeof(result));
+    return -1;
+  }
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN
+                     + ((!length)?CMD_I2C_END:0),
+, addr, &cmd, 1,
+) < 1) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    fprintf(stderr, "write command status failed\n");
+    return -1;
+  }
+  // just a test? return ok
+  if(!length) return 0;
+  if(usb_control_msg(handle,
+                     USB_CTRL_IN,
+                     CMD_I2C_IO + CMD_I2C_END,
+                     I2C_M_RD, addr, (char*)result, length,
+) < 1) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    fprintf(stderr, "read data status failed\n");
+    return -1;
+  }
+  // return 16 bit result
+  if(length == 2)
+    return 256*result[0] + result[1];
+  // return 8 bit result
+  return result[0];
+}
+/* write a single byte to the i2c client */
+int i2c_write_byte(unsigned char addr, char data) {
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, addr, &data, 1,
+) < 1) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    fprintf(stderr, "write command status failed\n");
+    return -1;
+  }
+  return 0;
+}
+/* write a command byte and a single byte to the i2c client */
+int i2c_write_cmd_and_byte(unsigned char addr, char cmd, char data) {
+  char msg[2];
+  msg[0] = cmd;
+  msg[1] = data;
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, addr, msg, 2,
+) < 1) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    fprintf(stderr, "write command status failed\n");
+    return -1;
+  }
+  return 0;
+}
+/* write a command byte and a 16 bit value to the i2c client */
+int i2c_write_cmd_and_word(unsigned char addr, char cmd, int data) {
+  char msg[3];
+  msg[0] = cmd;
+  msg[1] = data >> 8;
+  msg[2] = data & 0xff;
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, addr, msg, 3,
+) < 1) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    fprintf(stderr, "write command status failed\n");
+    return -1;
+  }
+  return 0;
+}
+/* read ds1621 control register */
+void ds1621_read_control(void) {
+  int result;
+  do {
+    result = i2c_read_with_cmd(DS1621_ADDR, 0xac, 1);
+  } while(!(result & 0x80));
+}
+/* main program process */
+int main(int argc, char *argv[]) {
+  struct usb_bus      *bus;
+  struct usb_device   *dev;
+  int i;
+#ifndef WIN
+  int ret;
+#endif
+  printf("--      i2c-tiny-usb test application       --\n");
+  printf("--         (c) 2006 by Till Harbaum         --\n");
+  printf("-- http://www.harbaum.org/till/i2c_tiny_usb --\n");
+  usb_init();
+  usb_find_busses();
+  usb_find_devices();
+  for(bus = usb_get_busses(); bus; bus = bus->next) {
+    for(dev = bus->devices; dev; dev = dev->next) {
+      if((dev->descriptor.idVendor == I2C_TINY_USB_VID) &&
+         (dev->descriptor.idProduct == I2C_TINY_USB_PID)) {
+        printf("Found i2c_tiny_usb device on bus %s device %s.\n",
+               bus->dirname, dev->filename);
+        /* open device */
+        if(!(handle = usb_open(dev)))
+          fprintf(stderr, "Error: Cannot open the device: %s\n",
+                  usb_strerror());
+        break;
+      }
+    }
+  }
+  if(!handle) {
+    fprintf(stderr, "Error: Could not find i2c_tiny_usb device\n");
+#ifdef WIN
+    printf("Press return to quit\n");
+    getchar();
+#endif
+    exit(-1);
+  }
+#ifndef WIN
+  /* Get exclusive access to interface 0. Does not work under windows. */
+  ret = usb_claim_interface(handle, 0);
+  if (ret != 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    exit(1);
+  }
+#endif
+  printf("writing to adapter");
+  i2c_tiny_usb_write(0,0,0);
+  /* do some testing */
+  printf("Getting adapter functionalities");
+  i2c_tiny_usb_get_func();
+  /* try to set i2c clock to 100kHz (10us), will actually result in ~50kHz */
+  /* since the software generated i2c clock isn't too exact. in fact setting */
+  /* it to 10us doesn't do anything at all since this already is the default */
+  printf("Reseting I2C clock to 100 kHz");
+  i2c_tiny_usb_set(CMD_SET_DELAY, 10);
+  /* -------- begin of ds1621 client processing --------- */
+  printf("Probing for DS1621 ... ");
+  /* try to access ds1621 at address DS1621_ADDR */
+  if(usb_control_msg(handle, USB_CTRL_IN,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, DS1621_ADDR, NULL, 0,
+) < 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    goto quit;
+  }
+  if(i2c_tiny_usb_get_status() == STATUS_ADDRESS_ACK) {
+    int temp;
+    printf("success at address 0x%02x\n", DS1621_ADDR);
+    /* activate one shot mode */
+    if(i2c_write_cmd_and_byte(DS1621_ADDR, 0xac, 0x01) < 0)
+      goto quit;
+    /* wait 10ms */
+    usleep(10000);
+#if 0
+    /* write default limits */
+    /* high threshold: +15 deg celsius */
+    i2c_write_cmd_and_word(DS1621_ADDR, 0xa1, 0x0f00);  /* 15 deg celsius */
+    usleep(10000);
+    /* low threshold: +10 deg celsius */
+    i2c_write_cmd_and_word(DS1621_ADDR, 0xa2, 0x0a00);
+    usleep(10000);
+#endif
+    /* display limits */
+    temp = i2c_read_with_cmd(DS1621_ADDR, 0xa1, 2);
+    printf("high temperature threshold = %d.%03d\n",
+           temp>>8, 1000 * (temp & 0xff) / 256);
+    temp = i2c_read_with_cmd(DS1621_ADDR, 0xa2, 2);
+    printf("low temperature threshold = %d.%03d\n",
+           temp>>8, 1000 * (temp & 0xff) / 256);
+    printf("Getting %d temperature readings:\n", LOOPS);
+    for(i=0;i<LOOPS;i++) {
+      int temp;
+      int counter, slope;
+      /* just write command 0xee to start conversion */
+      if(i2c_read_with_cmd(DS1621_ADDR, 0xee, 0) < 0)
+        goto quit;
+      ds1621_read_control();
+      temp = i2c_read_with_cmd(DS1621_ADDR, 0xaa, 2);
+      if(temp < 0)
+        goto quit;
+      /* read counter and slope values */
+      counter = i2c_read_with_cmd(DS1621_ADDR, 0xa8, 1);
+      slope = i2c_read_with_cmd(DS1621_ADDR, 0xa9, 1);
+      /* use counter and slope to adjust temperature (see ds1621 datasheet) */
+      temp = (temp & 0xff00) - 256/4;
+      temp += 256 * (slope - counter) / slope;
+      printf("temp = %d.%03d\n", temp>>8, 1000 * (temp & 0xff) / 256);
+    }
+  } else
+    printf("failed\n");
+  /* -------- end of ds1621 client processing --------- */
+  /* -------- begin of pcf8574 client processing --------- */
+  printf("Probing for PCF8574 ... ");
+  /* try to access pcf8574 at address PCF8574_ADDR */
+  if(usb_control_msg(handle, USB_CTRL_IN,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, PCF8574_ADDR, NULL, 0,
+) < 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    goto quit;
+  }
+  if(i2c_tiny_usb_get_status() == STATUS_ADDRESS_ACK) {
+    unsigned char bit_mask = 0xfe;
+    printf("success at address 0x%02x\n", PCF8574_ADDR);
+    printf("Cycling 0 bit %d times.\n", LOOPS);
+    /* just rotate a single 0 bit through the outputs */
+    for(i=0;i<LOOPS;i++) {
+      if(i2c_write_byte(PCF8574_ADDR, bit_mask) < 0)
+        goto quit;
+      /* rotate the byte */
+      bit_mask = (bit_mask << 1) | 1;
+      if(bit_mask == 0xff)
+        bit_mask = 0xfe;
+      usleep(100000);
+    }
+  } else
+    printf("failed\n");
+  /* -------- end of pcf8574 client processing --------- */
+ quit:
+#ifndef WIN
+  ret = usb_release_interface(handle, 0);
+  if (ret)
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+#endif
+  usb_close(handle);
+#ifdef WIN
+  printf("Press return to quit\n");
+  getchar();
+#endif
+  return 0;
+}

//Designs/Tools/i2c_AVR_USB/SW/testapp/PC/i2c_usb.exe
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream
Property changes:
Added: svn:executable
+*
\ No newline at end of property
Added: svn:mime-type
+application/octet-stream
\ No newline at end of property

 //Designs/Tools/i2c_AVR_USB/SW/testapp/PC/readme.txt
 ,0 → 1,50
+i2c-tiny-usb test application - http://www.harbaum.org/till/i2c_tiny_usb
+------------------------------------------------------------------------
+This simple test application is meant to demonstrate libusb
+interfacing to the i2c-tiny-usb interface.
+This is no useful application, if you are only interesting in
+using the i2c-tiny-usb interface in your linux box please
+use the kernel driver.
+Linux
+-----
+This demo application has been developed under and for linux. Just
+make sure you have libusb installed. To use this program just
+compile by typing "make" and run the resulting i2c_usb.
+Be sure that the i2c-tiny-usb kernel driver is not loaded while
+running the test application. Otherwise the test application will
+fail with the follwing error message:
+USB error: could not claim interface 0: Device or resource busy
+This is due to the fact that no two drivers may access the interface
+at the same time.
+Windows
+-------
+This program can be compiled for windows. This has been tested
+under Linux using xmingw and the windows port of libusb
+(see http://libusb-win32.sourceforge.net). To install the
+driver plug the device in and install the driver from
+the win directory. Then run testapp/i2c_usb.exe
+This program may also be compiled under windows using cygwin or
+mingw (which is part of cygwin). In order to use cygwin simply
+copy usb.h win32-linusb to /cygwin/usr/include and libusb.a to
+/cygwin/lib and do a "make -f Makefile.cygwin". Don't forget to
+distribute /cygwin/bin/cygwin1.dll with your file to allow it to
+run in non-cygwin environments as well. No dll is required when using
+mingw. In that case copy usb.h to /cygwin/usr/include/mingw and
+libusb.a to /cygwin/lib/mingw. Finally do a "make -f Makefile.mingw".
+MacOS X
+-------
+The program can be compiled under MacOS as well. The fink version
+of linusb has to be installed and a simple "make -f Makefile.macos"
+will build the native MacOS X version.

 //Designs/Tools/i2c_AVR_USB/SW/testapp/i2c_usb.c~
 ,0 → 1,438
+/*
+ * i2c_usb.c - test application for the i2c-tiby-usb interface
+ *             http://www.harbaum.org/till/i2c_tiny_usb
+ *
+ * $Id: i2c_usb.c,v 1.5 2007/01/05 19:30:43 harbaum Exp $
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <usb.h>
+/* ds1621 chip address (A0-A2 tied low) */
+#define DS1621_ADDR  0x48
+/* pcf8574 chip address (A0-A2 tied low) */
+#define PCF8574_ADDR  0x20
+#define LOOPS 100
+#define USB_CTRL_IN    (USB_TYPE_CLASS | USB_ENDPOINT_IN)
+#define USB_CTRL_OUT   (USB_TYPE_CLASS)
+/* the vendor and product id was donated by ftdi ... many thanks!*/
+#define I2C_TINY_USB_VID  0x0403
+#define I2C_TINY_USB_PID  0xc631
+#ifdef WIN
+#include <windows.h>
+#include <winbase.h>
+#define usleep(t) Sleep((t) / 1000)
+#endif
+#define I2C_M_RD                0x01
+/* commands via USB, must e.g. match command ids firmware */
+#define CMD_ECHO       0
+#define CMD_GET_FUNC   1
+#define CMD_SET_DELAY  2
+#define CMD_GET_STATUS 3
+#define CMD_I2C_IO     4
+#define CMD_I2C_BEGIN  1  // flag to I2C_IO
+#define CMD_I2C_END    2  // flag to I2C_IO
+#define STATUS_IDLE          0
+#define STATUS_ADDRESS_ACK   1
+#define STATUS_ADDRESS_NAK   2
+usb_dev_handle      *handle = NULL;
+/* write a set of bytes to the i2c_tiny_usb device */
+int i2c_tiny_usb_write(int request, int value, int index){
+  if(usb_control_msg(handle, USB_CTRL_OUT, request,
+                      value, index, NULL, 0, 1000) < 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  return 1;
+}
+/* read a set of bytes from the i2c_tiny_usb device */
+int i2c_tiny_usb_read(unsigned char cmd, void *data, int len) {
+  int                 nBytes;
+  /* send control request and accept return value */
+  nBytes = usb_control_msg(handle,USB_CTRL_IN, cmd, 0, 0, &data, len, 1000);
+  if(nBytes < 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return nBytes;
+  }
+  return 0;
+}
+/* get i2c usb interface test */
+void i2c_tiny_usb_test(void) {
+  unsigned long func;
+  if(i2c_tiny_usb_read(CMD_ECHO, &func, sizeof(func)) == 0)
+    printf("Functionality = %lx\n", func);
+}
+/* get i2c usb interface firmware version */
+void i2c_tiny_usb_get_func(void) {
+  unsigned long func;
+  if(i2c_tiny_usb_read(CMD_GET_FUNC, &func, sizeof(func)) == 0)
+    printf("Functionality = %lx\n", func);
+}
+/* set a value in the I2C_USB interface */
+void i2c_tiny_usb_set(unsigned char cmd, int value) {
+  if(usb_control_msg(handle,
+             USB_TYPE_VENDOR, cmd, value, 0,
+             NULL, 0, 1000) < 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+  }
+}
+/* get the current transaction status from the i2c_tiny_usb interface */
+int i2c_tiny_usb_get_status(void) {
+  int i;
+  unsigned char status;
+  if((i=i2c_tiny_usb_read(CMD_GET_STATUS, &status, sizeof(status))) < 0) {
+    fprintf(stderr, "Error reading status\n");
+    return i;
+  }
+  return status;
+}
+/* write command and read an 8 or 16 bit value from the given chip */
+int i2c_read_with_cmd(unsigned char addr, char cmd, int length) {
+  unsigned char result[2];
+  if((length < 0) || (length > sizeof(result))) {
+    fprintf(stderr, "request exceeds %lu bytes\n", sizeof(result));
+    return -1;
+  }
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN
+                     + ((!length)?CMD_I2C_END:0),
+, addr, &cmd, 1,
+) < 1) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    fprintf(stderr, "write command status failed\n");
+    return -1;
+  }
+  // just a test? return ok
+  if(!length) return 0;
+  if(usb_control_msg(handle,
+                     USB_CTRL_IN,
+                     CMD_I2C_IO + CMD_I2C_END,
+                     I2C_M_RD, addr, (char*)result, length,
+) < 1) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    fprintf(stderr, "read data status failed\n");
+    return -1;
+  }
+  // return 16 bit result
+  if(length == 2)
+    return 256*result[0] + result[1];
+  // return 8 bit result
+  return result[0];
+}
+/* write a single byte to the i2c client */
+int i2c_write_byte(unsigned char addr, char data) {
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, addr, &data, 1,
+) < 1) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    fprintf(stderr, "write command status failed\n");
+    return -1;
+  }
+  return 0;
+}
+/* write a command byte and a single byte to the i2c client */
+int i2c_write_cmd_and_byte(unsigned char addr, char cmd, char data) {
+  char msg[2];
+  msg[0] = cmd;
+  msg[1] = data;
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, addr, msg, 2,
+) < 1) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    fprintf(stderr, "write command status failed\n");
+    return -1;
+  }
+  return 0;
+}
+/* write a command byte and a 16 bit value to the i2c client */
+int i2c_write_cmd_and_word(unsigned char addr, char cmd, int data) {
+  char msg[3];
+  msg[0] = cmd;
+  msg[1] = data >> 8;
+  msg[2] = data & 0xff;
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, addr, msg, 3,
+) < 1) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    fprintf(stderr, "write command status failed\n");
+    return -1;
+  }
+  return 0;
+}
+/* read ds1621 control register */
+void ds1621_read_control(void) {
+  int result;
+  do {
+    result = i2c_read_with_cmd(DS1621_ADDR, 0xac, 1);
+  } while(!(result & 0x80));
+}
+/* main program process */
+int main(int argc, char *argv[]) {
+  struct usb_bus      *bus;
+  struct usb_device   *dev;
+  int i;
+#ifndef WIN
+  int ret;
+#endif
+  printf("--      i2c-tiny-usb test application       --\n");
+  printf("--         (c) 2006 by Till Harbaum         --\n");
+  printf("-- http://www.harbaum.org/till/i2c_tiny_usb --\n");
+  usb_init();
+  usb_find_busses();
+  usb_find_devices();
+  for(bus = usb_get_busses(); bus; bus = bus->next) {
+    for(dev = bus->devices; dev; dev = dev->next) {
+      if((dev->descriptor.idVendor == I2C_TINY_USB_VID) &&
+         (dev->descriptor.idProduct == I2C_TINY_USB_PID)) {
+        printf("Found i2c_tiny_usb device on bus %s device %s.\n",
+               bus->dirname, dev->filename);
+        /* open device */
+        if(!(handle = usb_open(dev)))
+          fprintf(stderr, "Error: Cannot open the device: %s\n",
+                  usb_strerror());
+        break;
+      }
+    }
+  }
+  if(!handle) {
+    fprintf(stderr, "Error: Could not find i2c_tiny_usb device\n");
+#ifdef WIN
+    printf("Press return to quit\n");
+    getchar();
+#endif
+    exit(-1);
+  }
+#ifndef WIN
+  /* Get exclusive access to interface 0. Does not work under windows. */
+  ret = usb_claim_interface(handle, 0);
+  if (ret != 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    exit(1);
+  }
+#endif
+  printf("writing to adapter");
+  i2c_tiny_usb_write(0,0,0);
+  /* do some testing */
+  printf("Getting adapter functionalities");
+  i2c_tiny_usb_get_func();
+  /* try to set i2c clock to 100kHz (10us), will actually result in ~50kHz */
+  /* since the software generated i2c clock isn't too exact. in fact setting */
+  /* it to 10us doesn't do anything at all since this already is the default */
+  printf("Reseting I2C clock to 100 kHz");
+  i2c_tiny_usb_set(CMD_SET_DELAY, 10);
+  /* -------- begin of ds1621 client processing --------- */
+  printf("Probing for DS1621 ... ");
+  /* try to access ds1621 at address DS1621_ADDR */
+  if(usb_control_msg(handle, USB_CTRL_IN,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, DS1621_ADDR, NULL, 0,
+) < 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    goto quit;
+  }
+  if(i2c_tiny_usb_get_status() == STATUS_ADDRESS_ACK) {
+    int temp;
+    printf("success at address 0x%02x\n", DS1621_ADDR);
+    /* activate one shot mode */
+    if(i2c_write_cmd_and_byte(DS1621_ADDR, 0xac, 0x01) < 0)
+      goto quit;
+    /* wait 10ms */
+    usleep(10000);
+#if 0
+    /* write default limits */
+    /* high threshold: +15 deg celsius */
+    i2c_write_cmd_and_word(DS1621_ADDR, 0xa1, 0x0f00);  /* 15 deg celsius */
+    usleep(10000);
+    /* low threshold: +10 deg celsius */
+    i2c_write_cmd_and_word(DS1621_ADDR, 0xa2, 0x0a00);
+    usleep(10000);
+#endif
+    /* display limits */
+    temp = i2c_read_with_cmd(DS1621_ADDR, 0xa1, 2);
+    printf("high temperature threshold = %d.%03d\n",
+           temp>>8, 1000 * (temp & 0xff) / 256);
+    temp = i2c_read_with_cmd(DS1621_ADDR, 0xa2, 2);
+    printf("low temperature threshold = %d.%03d\n",
+           temp>>8, 1000 * (temp & 0xff) / 256);
+    printf("Getting %d temperature readings:\n", LOOPS);
+    for(i=0;i<LOOPS;i++) {
+      int temp;
+      int counter, slope;
+      /* just write command 0xee to start conversion */
+      if(i2c_read_with_cmd(DS1621_ADDR, 0xee, 0) < 0)
+        goto quit;
+      ds1621_read_control();
+      temp = i2c_read_with_cmd(DS1621_ADDR, 0xaa, 2);
+      if(temp < 0)
+        goto quit;
+      /* read counter and slope values */
+      counter = i2c_read_with_cmd(DS1621_ADDR, 0xa8, 1);
+      slope = i2c_read_with_cmd(DS1621_ADDR, 0xa9, 1);
+      /* use counter and slope to adjust temperature (see ds1621 datasheet) */
+      temp = (temp & 0xff00) - 256/4;
+      temp += 256 * (slope - counter) / slope;
+      printf("temp = %d.%03d\n", temp>>8, 1000 * (temp & 0xff) / 256);
+    }
+  } else
+    printf("failed\n");
+  /* -------- end of ds1621 client processing --------- */
+  /* -------- begin of pcf8574 client processing --------- */
+  printf("Probing for PCF8574 ... ");
+  /* try to access pcf8574 at address PCF8574_ADDR */
+  if(usb_control_msg(handle, USB_CTRL_IN,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, PCF8574_ADDR, NULL, 0,
+) < 0) {
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+    goto quit;
+  }
+  if(i2c_tiny_usb_get_status() == STATUS_ADDRESS_ACK) {
+    unsigned char bit_mask = 0xfe;
+    printf("success at address 0x%02x\n", PCF8574_ADDR);
+    printf("Cycling 0 bit %d times.\n", LOOPS);
+    /* just rotate a single 0 bit through the outputs */
+    for(i=0;i<LOOPS;i++) {
+      if(i2c_write_byte(PCF8574_ADDR, bit_mask) < 0)
+        goto quit;
+      /* rotate the byte */
+      bit_mask = (bit_mask << 1) | 1;
+      if(bit_mask == 0xff)
+        bit_mask = 0xfe;
+      usleep(100000);
+    }
+  } else
+    printf("failed\n");
+  /* -------- end of pcf8574 client processing --------- */
+ quit:
+#ifndef WIN
+  ret = usb_release_interface(handle, 0);
+  if (ret)
+    fprintf(stderr, "USB error: %s\n", usb_strerror());
+#endif
+  usb_close(handle);
+#ifdef WIN
+  printf("Press return to quit\n");
+  getchar();
+#endif
+  return 0;
+}

//Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/.cvsignore
0,0 → 1,0
~ .o i2c_usb

 //Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/Makefile
 ,0 → 1,21
+#
+# Makefile
+#
+APP = i2c_usb
+all: $(APP)
+clean:
+        rm -f $(APP)
+$(APP): $(APP).c
+        $(CC) -o $@ $(APP).c `pkg-config gtk+-2.0 hildon-1 --cflags --libs` -lusb
+install:
+        install $(APP) $(DESTDIR)/usr/bin
+        install i2c_tiny_usb.rules $(DESTDIR)/etc/udev/rules.d
+        install i2c_tiny_usb.desktop $(DESTDIR)/usr/share/applications/hildon
+        install i2c.26.png $(DESTDIR)/usr/share/icons/hicolor/26x26/hildon/i2c_tiny_usb.png
+        install i2c.40.png $(DESTDIR)/usr/share/icons/hicolor/40x40/hildon/i2c_tiny_usb.png
+        install i2c.64.png $(DESTDIR)/usr/share/icons/hicolor/scalable/hildon/i2c_tiny_usb.png

 //Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/debian/changelog
 ,0 → 1,10
+i2c-tiny-usb (0.2) unstable; urgency=low
+  * Initial release (Closes: #nnnn)  <nnnn is the bug number of your ITP>
+ -- Till Harbaum <Till@Harbaum.org>  Tue, 25 Dec 2007 21:02:30 +0100
+  * First hildonized version
+ -- Till Harbaum <Till@Harbaum.org>  Sat, 29 Dec 2007 12:06:43 +0100

//Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/debian/compat
0,0 → 1,0
5

 //Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/debian/control
 ,0 → 1,26
+Source: i2c-tiny-usb
+Section: user/other
+Priority: extra
+Maintainer: Till Harbaum <Till@Harbaum.org>
+Build-Depends: debhelper (>= 5), libgtk2.0-dev, libusb-dev, libhildon1-dev
+Standards-Version: 3.7.2
+Package: i2c-tiny-usb
+Architecture: any
+Depends: ${shlibs:Depends}, hildon-desktop
+Description: User space application for i2c_tiny_usb
+ This simple test application for the i2c-tiny-usb interface bypasses
+ the kernel driver being part of the kernel since 2.6.21. The kernel
+ driver may therefore have to be unloaded before this i2c_usb is being
+ run. This program currently supports the ds1621 temperature sensor
+ and the pcf8574 parallel port. See www.harbaum.org/till/i2c_tiny_usb
+ for details.
+XB-Maemo-Icon-26:
+ iVBORw0KGgoAAAANSUhEUgAAABoAAAAaCAYAAACpSkzOAAAAF3RFWHRTb2Z0d2Fy
+ ZQBYUGFpbnQgMi43LjguMT1iBU0AAAD2SURBVEiJvZZLDoQgDIbLZE7nBk5hz9Rb
+MbrdRamhkcp4qB/YhQK/UptAMfMAACAiMfHZBGRAwBwzAyIyMuyPMGBfd+BiJxb
+WEeO+z9rZtt2Bfa4D3vnKs9V3RxzLecdiSY6mGBsBKXWlrCRGP1LUmW2kaSSER
+f+oBIvupNQEjTq0VmkWwygkfZfqpu4faKppK+rpNdAjqdN2k2krEuePV50FmQ6y
+N3rLI3sdd3zaIay8yiEoA6KMWZ2aWt9mg+xVeVdOgohZH0taYGkqkBlVFcgMk4C
++ZWVRdjPB8N3IO15l5ekRZxarf+D8Cb1623LpA/+pCiKqwn6CcAAAAASUVORK5C
+ YII=

 //Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/debian/copyright
 ,0 → 1,13
+This package was debianized by Till Harbaum <Till@Harbaum.org> on
+Tue, 25 Dec 2007 21:02:30 +0100.
+Copyright:
+    <Copyright (C) 2007 Till Harbaum>
+License:
+    <GPL>
+The Debian packaging is (C) 2007, Till Harbaum <Till@Harbaum.org> and
+is licensed under the GPL, see `/usr/share/common-licenses/GPL'.

//Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/debian/dirs
0,0 → 1,7
usr/bin
usr/sbin
etc/udev/rules.d
usr/share/applications/hildon
usr/share/icons/hicolor/26x26/hildon
usr/share/icons/hicolor/40x40/hildon
usr/share/icons/hicolor/scalable/hildon

//Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/debian/docs
0,0 → 1,2
readme.txt
readme.txt

 //Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/debian/postinst
 ,0 → 1,8
+#! /bin/sh
+# The clock might be wrong and we know that we need to update the icon
+# cache so we just force it.
+gtk-update-icon-cache -f /usr/share/icons/hicolor
+exit 0
 Property changes:
 Added: svn:executable
 +*
 \ No newline at end of property

 //Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/debian/rules
 ,0 → 1,98
+#!/usr/bin/make -f
+# -*- makefile -*-
+# Sample debian/rules that uses debhelper.
+# This file was originally written by Joey Hess and Craig Small.
+# As a special exception, when this file is copied by dh-make into a
+# dh-make output file, you may use that output file without restriction.
+# This special exception was added by Craig Small in version 0.37 of dh-make.
+# Uncomment this to turn on verbose mode.
+#export DH_VERBOSE=1
+CFLAGS = -Wall -g
+ifneq (,$(findstring noopt,$(DEB_BUILD_OPTIONS)))
+        CFLAGS += -O0
+else
+        CFLAGS += -O2
+endif
+configure: configure-stamp
+configure-stamp:
+        dh_testdir
+        # Add here commands to configure the package.
+        touch configure-stamp
+build: build-stamp
+build-stamp: configure-stamp
+        dh_testdir
+        # Add here commands to compile the package.
+        $(MAKE)
+        #docbook-to-man debian/i2c-tiny-usb.sgml > i2c-tiny-usb.1
+        touch $@
+clean:
+        dh_testdir
+        dh_testroot
+        rm -f build-stamp configure-stamp
+        # Add here commands to clean up after the build process.
+        -$(MAKE) clean
+        dh_clean
+install: build
+        dh_testdir
+        dh_testroot
+        dh_clean -k
+        dh_installdirs
+        # Add here commands to install the package into debian/i2c-tiny-usb.
+        $(MAKE) DESTDIR=$(CURDIR)/debian/i2c-tiny-usb install
+# Build architecture-independent files here.
+binary-indep: build install
+# We have nothing to do by default.
+# Build architecture-dependent files here.
+binary-arch: build install
+        dh_testdir
+        dh_testroot
+        dh_installchangelogs
+        dh_installdocs
+        dh_installexamples
+#       dh_install
+#       dh_installmenu
+#       dh_installdebconf
+#       dh_installlogrotate
+#       dh_installemacsen
+#       dh_installpam
+#       dh_installmime
+#       dh_python
+#       dh_installinit
+#       dh_installcron
+#       dh_installinfo
+        dh_installman
+        dh_link
+        dh_strip
+        dh_compress
+        dh_fixperms
+#       dh_perl
+#       dh_makeshlibs
+        dh_installdeb
+        dh_shlibdeps
+        dh_gencontrol
+        dh_md5sums
+        dh_builddeb
+binary: binary-indep binary-arch
+.PHONY: build clean binary-indep binary-arch binary install configure
 Property changes:
 Added: svn:executable
 +*
 \ No newline at end of property

//Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/i2c.26.png
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream
Property changes:
Added: svn:mime-type
+application/octet-stream
\ No newline at end of property

//Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/i2c.40.png
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream
Property changes:
Added: svn:mime-type
+application/octet-stream
\ No newline at end of property

//Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/i2c.64.png
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream
Property changes:
Added: svn:mime-type
+application/octet-stream
\ No newline at end of property

//Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/i2c_tiny_usb.desktop
0,0 → 1,7
[Desktop Entry]
Encoding=UTF-8
Version=1.0
Type=Application
Name=I²C-Tiny-USB Demo
Icon=i2c_tiny_usb
Exec=/usr/bin/i2c_usb

//Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/i2c_tiny_usb.rules
0,0 → 1,2
# give user access to i2c-tiny-usb
BUS=="usb", ACTION=="add", SUBSYSTEM=="usb_device", SYSFS{idVendor}=="0403", SYSFS{idProduct}=="c631", GROUP="users", OWNER="user"

 //Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/i2c_usb.c
 ,0 → 1,513
+/*
+ * i2c_usb.c - test application for the i2c-tiny-usb interface
+ *             http://www.harbaum.org/till/i2c_tiny_usb
+ *
+ *
+ */
+// #define NO_USB
+/* Includes */
+#include <hildon/hildon-program.h>
+#include <gtk/gtkmain.h>
+#include <gtk/gtklabel.h>
+#include <glib.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <usb.h>
+/* ds1621 chip address (A0-A2 tied low) */
+#define DS1621_ADDR  0x48
+/* pcf8574 chip address (A0-A2 tied low) */
+#define PCF8574_ADDR  0x20
+#define LOOPS 100
+#define USB_CTRL_IN    (USB_TYPE_CLASS | USB_ENDPOINT_IN)
+#define USB_CTRL_OUT   (USB_TYPE_CLASS)
+/* the vendor and product id was donated by ftdi ... many thanks!*/
+#define I2C_TINY_USB_VID  0x0403
+#define I2C_TINY_USB_PID  0xc631
+#define I2C_M_RD                0x01
+/* commands via USB, must e.g. match command ids firmware */
+#define CMD_ECHO       0
+#define CMD_GET_FUNC   1
+#define CMD_SET_DELAY  2
+#define CMD_GET_STATUS 3
+#define CMD_I2C_IO     4
+#define CMD_I2C_BEGIN  1  // flag to I2C_IO
+#define CMD_I2C_END    2  // flag to I2C_IO
+#define STATUS_IDLE          0
+#define STATUS_ADDRESS_ACK   1
+#define STATUS_ADDRESS_NAK   2
+usb_dev_handle      *handle = NULL;
+gboolean pcf8574_present = 0;
+gboolean ds1621_present = 0;
+/* global reference to main window */
+HildonWindow *window;
+void error(char *msg, char *parm);
+/* write a set of bytes to the i2c_tiny_usb device */
+int i2c_tiny_usb_write(int request, int value, int index) {
+  if(usb_control_msg(handle, USB_CTRL_OUT, request,
+                      value, index, NULL, 0, 1000) < 0) {
+    error("USB error: %s", usb_strerror());
+    return -1;
+  }
+  return 1;
+}
+/* read a set of bytes from the i2c_tiny_usb device */
+int i2c_tiny_usb_read(unsigned char cmd, void *data, int len) {
+  int                 nBytes;
+  /* send control request and accept return value */
+  nBytes = usb_control_msg(handle,
+           USB_CTRL_IN,
+           cmd, 0, 0, data, len, 1000);
+  if(nBytes < 0) {
+    error("USB error: %s", usb_strerror());
+    return nBytes;
+  }
+  return 0;
+}
+/* get i2c usb interface firmware version */
+void i2c_tiny_usb_get_func(GtkWidget *vbox) {
+  unsigned long func;
+  if(i2c_tiny_usb_read(CMD_GET_FUNC, &func, sizeof(func)) == 0) {
+    char str[64];
+    sprintf(str, "Functionality = %lx\n", func);
+    gtk_box_pack_start(GTK_BOX(vbox), gtk_label_new(str), FALSE, FALSE, 0);
+  } else
+    gtk_box_pack_start(GTK_BOX(vbox),
+                       gtk_label_new("Unable to read functionality"),
+                       FALSE, FALSE, 0);
+}
+/* set a value in the I2C_USB interface */
+void i2c_tiny_usb_set(unsigned char cmd, int value) {
+  if(usb_control_msg(handle,
+             USB_TYPE_VENDOR, cmd, value, 0,
+             NULL, 0, 1000) < 0) {
+    error("USB error: %s", usb_strerror());
+  }
+}
+/* get the current transaction status from the i2c_tiny_usb interface */
+int i2c_tiny_usb_get_status(void) {
+  int i;
+  unsigned char status;
+  if((i=i2c_tiny_usb_read(CMD_GET_STATUS, &status, sizeof(status))) < 0) {
+    error("Error reading status", NULL);
+    return i;
+  }
+  return status;
+}
+/* write command and read an 8 or 16 bit value from the given chip */
+int i2c_read_with_cmd(unsigned char addr, char cmd, int length) {
+  unsigned char result[2];
+  if((length < 0) || (length > sizeof(result))) {
+    error("Request exceeds buffer size", NULL);
+    return -1;
+  }
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN
+                     + ((!length)?CMD_I2C_END:0),
+, addr, &cmd, 1,
+) < 1) {
+    error("USB error: %s", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    error("Write command status failed!", NULL);
+    return -1;
+  }
+  // just a test? return ok
+  if(!length) return 0;
+  if(usb_control_msg(handle,
+                     USB_CTRL_IN,
+                     CMD_I2C_IO + CMD_I2C_END,
+                     I2C_M_RD, addr, (char*)result, length,
+) < 1) {
+    error("USB error: %s", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    error("read data status failed", NULL);
+    return -1;
+  }
+  // return 16 bit result
+  if(length == 2)
+    return 256*result[0] + result[1];
+  // return 8 bit result
+  return result[0];
+}
+/* write a single byte to the i2c client */
+int i2c_write_byte(unsigned char addr, char data) {
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, addr, &data, 1,
+) < 1) {
+    error("USB error: %s", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    error("Write command status failed", NULL);
+    return -1;
+  }
+  return 0;
+}
+/* write a command byte and a single byte to the i2c client */
+int i2c_write_cmd_and_byte(unsigned char addr, char cmd, char data) {
+  char msg[2];
+  msg[0] = cmd;
+  msg[1] = data;
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, addr, msg, 2,
+) < 1) {
+    error("USB error: %s", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    error("Write command status failed", NULL);
+    return -1;
+  }
+  return 0;
+}
+/* write a command byte and a 16 bit value to the i2c client */
+int i2c_write_cmd_and_word(unsigned char addr, char cmd, int data) {
+  char msg[3];
+  msg[0] = cmd;
+  msg[1] = data >> 8;
+  msg[2] = data & 0xff;
+  /* write one byte register address to chip */
+  if(usb_control_msg(handle, USB_CTRL_OUT,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, addr, msg, 3,
+) < 1) {
+    error("USB error: %s", usb_strerror());
+    return -1;
+  }
+  if(i2c_tiny_usb_get_status() != STATUS_ADDRESS_ACK) {
+    error("Write command status failed", NULL);
+    return -1;
+  }
+  return 0;
+}
+/* read ds1621 control register */
+void ds1621_read_control(void) {
+  int result;
+  do {
+    result = i2c_read_with_cmd(DS1621_ADDR, 0xac, 1);
+  } while(!(result & 0x80));
+}
+/************************** GUI related code ************************/
+static void
+button_clicked (GtkButton* button, gpointer data) {
+  GtkWidget **checkBits = (GtkWidget**)data;
+  int i, value = 0;
+  for(i=0;i<8;i++) {
+    value <<= 1;
+    if(GTK_WIDGET_STATE(checkBits[i]))
+      value |= 1;
+  }
+#ifndef NO_USB
+  if(pcf8574_present)
+    i2c_write_byte(PCF8574_ADDR, value);
+#endif
+}
+static gboolean
+update_temperature(gpointer data) {
+  GtkLabel *label = (GtkLabel*)data;
+  char str[32];
+  int temp, counter, slope;
+  /* just write command 0xee to start conversion */
+  if(i2c_read_with_cmd(DS1621_ADDR, 0xee, 0) < 0)
+    return 0;
+  ds1621_read_control();
+  temp = i2c_read_with_cmd(DS1621_ADDR, 0xaa, 2);
+  if(temp < 0) return 0;
+  /* read counter and slope values */
+  counter = i2c_read_with_cmd(DS1621_ADDR, 0xa8, 1);
+  slope = i2c_read_with_cmd(DS1621_ADDR, 0xa9, 1);
+  /* use counter and slope to adjust temperature (see ds1621 datasheet) */
+  temp = (temp & 0xff00) - 256/4;
+  temp += 256 * (slope - counter) / slope;
+  sprintf(str, "%d.%03d °C", temp>>8, 1000 * (temp & 0xff) / 256);
+  gtk_label_set_text(label, str);
+  return 1;
+}
+void error(char *msg, char *parm) {
+  GtkWidget *dialog;
+  dialog = gtk_message_dialog_new(GTK_WINDOW(window),
+                                  GTK_DIALOG_DESTROY_WITH_PARENT,
+                                  GTK_MESSAGE_ERROR,
+                                  GTK_BUTTONS_CLOSE,
+                                  msg, parm);
+  gtk_dialog_run(GTK_DIALOG(dialog));
+  gtk_widget_destroy(dialog);
+}
+int main(int argc, char *argv[]) {
+  /* Create needed variables */
+  HildonProgram *program;
+  int i;
+  /* pcf8574 parallel port interface */
+  GtkWidget *vbox;
+  GtkWidget *ds1621Frame;
+  GtkWidget *tempLabel;
+  GtkWidget *pcf8574Frame;
+  GtkWidget *hbox, *buttonBox;
+  GtkWidget *checkBits[8];
+  GSource *temp_timer_src;
+  struct usb_bus      *bus;
+  struct usb_device   *dev;
+  int ret;
+  /* Initialize the GTK. */
+  gtk_init(&argc, &argv);
+  /* Create the hildon program and setup the title */
+  program = HILDON_PROGRAM(hildon_program_get_instance());
+  g_set_application_name("I²C-Tiny-USB Demo");
+  /* Create HildonWindow and set it to HildonProgram */
+  window = HILDON_WINDOW(hildon_window_new());
+  hildon_program_add_window(program, window);
+  /************* main view **************/
+  gtk_container_add(GTK_CONTAINER(window),
+                    GTK_WIDGET(vbox = gtk_vbox_new(FALSE, 0)));
+  /************* hardware initialization **************/
+#ifndef NO_USB
+  usb_init();
+  usb_find_busses();
+  usb_find_devices();
+  for(bus = usb_get_busses(); bus; bus = bus->next) {
+    for(dev = bus->devices; dev; dev = dev->next) {
+      if((dev->descriptor.idVendor == I2C_TINY_USB_VID) &&
+         (dev->descriptor.idProduct == I2C_TINY_USB_PID)) {
+        char str[128];
+        sprintf(str, "\nI²C-Tiny-USB device on bus %s device %s",
+                bus->dirname, dev->filename);
+        gtk_box_pack_start(GTK_BOX(vbox), gtk_label_new(str), FALSE, FALSE, 0);
+        /* open device */
+        if(!(handle = usb_open(dev))) {
+          error("Cannot open the device: %s", usb_strerror());
+          exit(EIO);
+        }
+        break;
+      }
+    }
+  }
+  if(!handle) {
+    error("No i2c_tiny_usb device attached", NULL);
+    exit(ENODEV);
+  }
+  /* Get exclusive access to interface 0 */
+  ret = usb_claim_interface(handle, 0);
+  if (ret != 0) {
+    error("USB error: %s", usb_strerror());
+    exit(EPERM);
+  }
+  /* do some testing */
+  i2c_tiny_usb_get_func(vbox);
+  /* try to set i2c clock to 100kHz (10us), will actually result in ~50kHz */
+  /* since the software generated i2c clock isn't too exact. in fact setting */
+  /* it to 10us doesn't do anything at all since this already is the default */
+  i2c_tiny_usb_set(CMD_SET_DELAY, 10);
+#else
+  gtk_box_pack_start(GTK_BOX(vbox), gtk_label_new("\nNO_USB option set"),
+                     FALSE, FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(vbox), gtk_label_new("No functions available\n"),
+                     FALSE, FALSE, 0);
+#endif
+  /************* create ds1621 frame **************/
+  gtk_container_add(GTK_CONTAINER(vbox),
+                    GTK_WIDGET(ds1621Frame = gtk_frame_new(" ds1621 ")));
+  gtk_container_add(GTK_CONTAINER(ds1621Frame),
+                    GTK_WIDGET(hbox = gtk_hbox_new(FALSE, 0)));
+  gtk_box_pack_start(GTK_BOX(hbox), gtk_label_new("Temperature:"),
+                     FALSE, FALSE, 32);
+  gtk_box_pack_start(GTK_BOX(hbox), tempLabel = gtk_label_new("--- °C"),
+                     FALSE, FALSE, 0);
+#ifndef NO_USB
+  /* try to access ds1621 at address DS1621_ADDR */
+  if(usb_control_msg(handle, USB_CTRL_IN,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, DS1621_ADDR, NULL, 0,
+) < 0) {
+    error("USB error: %s", usb_strerror());
+    goto quit;
+  }
+  if(i2c_tiny_usb_get_status() == STATUS_ADDRESS_ACK) {
+    ds1621_present = 1;
+    /* activate one shot mode */
+    if(i2c_write_cmd_and_byte(DS1621_ADDR, 0xac, 0x01) < 0)
+      goto quit;
+    /* wait 10ms */
+    usleep(10000);
+    /* build an update timer for the temperature display */
+    temp_timer_src = g_timeout_source_new(1000);
+    g_source_set_callback(temp_timer_src, update_temperature, tempLabel, NULL);
+    g_source_attach (temp_timer_src, NULL);
+    g_source_unref(temp_timer_src);
+  } else
+    gtk_frame_set_label((GtkFrame*)ds1621Frame, " ds1621 - not found ");
+#endif
+  /************* create pcf8574 frame **************/
+  /* create a frame for the pcf8574 elements */
+  gtk_container_add(GTK_CONTAINER(vbox),
+                    GTK_WIDGET(pcf8574Frame = gtk_frame_new(" pcf8574 ")));
+  gtk_container_add(GTK_CONTAINER(pcf8574Frame),
+                    GTK_WIDGET(hbox = gtk_hbox_new(FALSE, 0)));
+  gtk_box_pack_start(GTK_BOX(hbox), gtk_label_new("Output bits:"),
+                     FALSE, FALSE, 32);
+  /* create a button box for the eight buttons */
+  gtk_box_pack_start(GTK_BOX(hbox), buttonBox = gtk_hbutton_box_new(),
+                     FALSE, FALSE, 0);
+  gtk_button_box_set_child_size((GtkButtonBox*)buttonBox, 0, 0);
+  /* add the eight buttons */
+  for(i=0;i<8;i++) {
+    gtk_container_add(GTK_CONTAINER(buttonBox),
+                      GTK_WIDGET(checkBits[i] = gtk_check_button_new()));
+    g_signal_connect(G_OBJECT(checkBits[i]), "clicked",
+                     G_CALLBACK(button_clicked), checkBits);
+  }
+#ifndef NO_USB
+  /* try to access pcf8574 at address PCF8574_ADDR */
+  if(usb_control_msg(handle, USB_CTRL_IN,
+                     CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END,
+, PCF8574_ADDR, NULL, 0,
+) < 0) {
+    error("USB error: %s", usb_strerror());
+    goto quit;
+  }
+  if(i2c_tiny_usb_get_status() == STATUS_ADDRESS_ACK) {
+    pcf8574_present = 1;
+    i2c_write_byte(PCF8574_ADDR, 0x00);  /* default value */
+  } else
+    gtk_frame_set_label((GtkFrame*)pcf8574Frame, " pcf8574 - not found ");
+#endif
+  /***************************         *************************/
+  gtk_box_pack_start(GTK_BOX(vbox),
+             gtk_label_new("\nhttp://www.harbaum.org/till/i2c_tiny_usb\n"),
+                     FALSE, FALSE, 0);
+  /* begin the main application */
+  gtk_widget_show_all(GTK_WIDGET(window));
+  /* Connect signal to X in the upper corner */
+  g_signal_connect(G_OBJECT(window), "delete_event",
+                   G_CALLBACK(gtk_main_quit), NULL);
+  gtk_main();
+ quit:
+  ret = usb_release_interface(handle, 0);
+  if (ret)
+    error("USB error: %s\n", usb_strerror());
+  usb_close(handle);
+  return 0;
+}

 //Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/readme.txt
 ,0 → 1,52
+i2c-tiny-usb test application - http://www.harbaum.org/till/i2c_tiny_usb
+------------------------------------------------------------------------
+This simple test application is meant to demonstrate libusb
+interfacing to the i2c-tiny-usb interface.
+This is no useful application, if you are only interesting in
+using the i2c-tiny-usb interface in your linux box please
+use the kernel driver.
+Linux
+-----
+required packages: libgtk2.0-dev
+This demo application has been developed under and for linux. Just
+make sure you have libusb installed. To use this program just
+compile by typing "make" and run the resulting i2c_usb.
+Be sure that the i2c-tiny-usb kernel driver is not loaded while
+running the test application. Otherwise the test application will
+fail with the follwing error message:
+USB error: could not claim interface 0: Device or resource busy
+This is due to the fact that no two drivers may access the interface
+at the same time.
+Windows
+-------
+This program can be compiled for windows. This has been tested
+under Linux using xmingw and the windows port of libusb
+(see http://libusb-win32.sourceforge.net). To install the
+driver plug the device in and install the driver from
+the win directory. Then run testapp/i2c_usb.exe
+This program may also be compiled under windows using cygwin or
+mingw (which is part of cygwin). In order to use cygwin simply
+copy usb.h win32-linusb to /cygwin/usr/include and libusb.a to
+/cygwin/lib and do a "make -f Makefile.cygwin". Don't forget to
+distribute /cygwin/bin/cygwin1.dll with your file to allow it to
+run in non-cygwin environments as well. No dll is required when using
+mingw. In that case copy usb.h to /cygwin/usr/include/mingw and
+libusb.a to /cygwin/lib/mingw. Finally do a "make -f Makefile.mingw".
+MacOS X
+-------
+The program can be compiled under MacOS as well. The fink version
+of linusb has to be installed and a simple "make -f Makefile.macos"
+will build the native MacOS X version.

 //Designs/Tools/i2c_AVR_USB/SW/testapp/mobile/readme.txt~
 ,0 → 1,50
+i2c-tiny-usb test application - http://www.harbaum.org/till/i2c_tiny_usb
+------------------------------------------------------------------------
+This simple test application is meant to demonstrate libusb
+interfacing to the i2c-tiny-usb interface.
+This is no useful application, if you are only interesting in
+using the i2c-tiny-usb interface in your linux box please
+use the kernel driver.
+Linux
+-----
+This demo application has been developed under and for linux. Just
+make sure you have libusb installed. To use this program just
+compile by typing "make" and run the resulting i2c_usb.
+Be sure that the i2c-tiny-usb kernel driver is not loaded while
+running the test application. Otherwise the test application will
+fail with the follwing error message:
+USB error: could not claim interface 0: Device or resource busy
+This is due to the fact that no two drivers may access the interface
+at the same time.
+Windows
+-------
+This program can be compiled for windows. This has been tested
+under Linux using xmingw and the windows port of libusb
+(see http://libusb-win32.sourceforge.net). To install the
+driver plug the device in and install the driver from
+the win directory. Then run testapp/i2c_usb.exe
+This program may also be compiled under windows using cygwin or
+mingw (which is part of cygwin). In order to use cygwin simply
+copy usb.h win32-linusb to /cygwin/usr/include and libusb.a to
+/cygwin/lib and do a "make -f Makefile.cygwin". Don't forget to
+distribute /cygwin/bin/cygwin1.dll with your file to allow it to
+run in non-cygwin environments as well. No dll is required when using
+mingw. In that case copy usb.h to /cygwin/usr/include/mingw and
+libusb.a to /cygwin/lib/mingw. Finally do a "make -f Makefile.mingw".
+MacOS X
+-------
+The program can be compiled under MacOS as well. The fink version
+of linusb has to be installed and a simple "make -f Makefile.macos"
+will build the native MacOS X version.

 //Designs/Tools/i2c_AVR_USB/SW/win_driver/i2c_tiny_usb.inf
 ,0 → 1,136
+[Version]
+Signature = "$Chicago$"
+provider  = %manufacturer%
+DriverVer = 03/20/2007,0.1.12.1
+CatalogFile = i2c_tiny_usb.cat
+CatalogFile.NT = i2c_tiny_usb.cat
+CatalogFile.NTAMD64 = i2c_tiny_usb_x64.cat
+Class = LibUsbDevices
+ClassGUID = {EB781AAF-9C70-4523-A5DF-642A87ECA567}
+[ClassInstall]
+AddReg=libusb_class_install_add_reg
+[ClassInstall32]
+AddReg=libusb_class_install_add_reg
+[libusb_class_install_add_reg]
+HKR,,,,"LibUSB-Win32 Devices"
+HKR,,Icon,,"-20"
+[Manufacturer]
+%manufacturer%=Devices,NT,NTAMD64
+;--------------------------------------------------------------------------
+; Files
+;--------------------------------------------------------------------------
+[SourceDisksNames]
+= "Libusb-Win32 Driver Installation Disk",,
+[SourceDisksFiles]
+libusb0.sys = 1,,
+libusb0.dll = 1,,
+libusb0_x64.sys = 1,,
+libusb0_x64.dll = 1,,
+[DestinationDirs]
+libusb_files_sys = 10,system32\drivers
+libusb_files_sys_x64 = 10,system32\drivers
+libusb_files_dll = 10,system32
+libusb_files_dll_wow64 = 10,syswow64
+libusb_files_dll_x64 = 10,system32
+[libusb_files_sys]
+libusb0.sys
+[libusb_files_sys_x64]
+libusb0.sys,libusb0_x64.sys
+[libusb_files_dll]
+libusb0.dll
+[libusb_files_dll_wow64]
+libusb0.dll
+[libusb_files_dll_x64]
+libusb0.dll,libusb0_x64.dll
+;--------------------------------------------------------------------------
+; Device driver
+;--------------------------------------------------------------------------
+[LIBUSB_DEV]
+CopyFiles = libusb_files_sys, libusb_files_dll
+AddReg    = libusb_add_reg
+[LIBUSB_DEV.NT]
+CopyFiles = libusb_files_sys, libusb_files_dll
+[LIBUSB_DEV.NTAMD64]
+CopyFiles = libusb_files_sys_x64, libusb_files_dll_wow64, libusb_files_dll_x64
+[LIBUSB_DEV.HW]
+DelReg = libusb_del_reg_hw
+AddReg = libusb_add_reg_hw
+[LIBUSB_DEV.NT.HW]
+DelReg = libusb_del_reg_hw
+AddReg = libusb_add_reg_hw
+[LIBUSB_DEV.NTAMD64.HW]
+DelReg = libusb_del_reg_hw
+AddReg = libusb_add_reg_hw
+[LIBUSB_DEV.NT.Services]
+AddService = libusb0, 0x00000002, libusb_add_service
+[LIBUSB_DEV.NTAMD64.Services]
+AddService = libusb0, 0x00000002, libusb_add_service
+[libusb_add_reg]
+HKR,,DevLoader,,*ntkern
+HKR,,NTMPDriver,,libusb0.sys
+; Older versions of this .inf file installed filter drivers. They are not
+; needed any more and must be removed
+[libusb_del_reg_hw]
+HKR,,LowerFilters
+HKR,,UpperFilters
+; Device properties
+[libusb_add_reg_hw]
+HKR,,SurpriseRemovalOK, 0x00010001, 1
+;--------------------------------------------------------------------------
+; Services
+;--------------------------------------------------------------------------
+[libusb_add_service]
+DisplayName    = "LibUsb-Win32 - Kernel Driver 03/20/2007, 0.1.12.1"
+ServiceType    = 1
+StartType      = 3
+ErrorControl   = 0
+ServiceBinary  = %12%\libusb0.sys
+;--------------------------------------------------------------------------
+; Devices
+;--------------------------------------------------------------------------
+[Devices]
+"I2C_TINY_USB"=LIBUSB_DEV, USB\VID_0403&PID_c631
+[Devices.NT]
+"I2C_TINY_USB"=LIBUSB_DEV, USB\VID_0403&PID_c631
+[Devices.NTAMD64]
+"I2C_TINY_USB"=LIBUSB_DEV, USB\VID_0403&PID_c631
+;--------------------------------------------------------------------------
+; Strings
+;--------------------------------------------------------------------------
+[Strings]
+manufacturer = "Till Harbaum"
 Property changes:
 Added: svn:executable
 +*
 \ No newline at end of property

//Designs/Tools/i2c_AVR_USB/SW/win_driver/libusb0.dll
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream
Property changes:
Added: svn:mime-type
+application/octet-stream
\ No newline at end of property

//Designs/Tools/i2c_AVR_USB/SW/win_driver/libusb0.sys
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream
Property changes:
Added: svn:mime-type
+application/octet-stream
\ No newline at end of property

//Designs/Tools/i2c_AVR_USB/SW/win_driver/libusb0_x64.dll
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream
Property changes:
Added: svn:mime-type
+application/octet-stream
\ No newline at end of property

//Designs/Tools/i2c_AVR_USB/SW/win_driver/libusb0_x64.sys
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream
Property changes:
Added: svn:mime-type
+application/octet-stream
\ No newline at end of property

Subversion Repositories – MLAB

//Designs/Tools/ @ 3331 → //Designs/Tools/ @ 3332

Compare Path:	Rev
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