library

/*! \file uartsw2conf.h \brief Interrupt-driven Software UART Driver Configuration. */
//*****************************************************************************
//
// File Name    : 'uartsw2conf.h'
// Title                : Interrupt-driven Software UART Driver Configuration
// Author               : Pascal Stang - Copyright (C) 2002-2003
// Created              : 7/20/2002
// Revised              : 4/27/2004
// Version              : 0.6
// Target MCU   : Atmel AVR Series (intended for the ATmega16 and ATmega32)
// Editor Tabs  : 4
//
// Description  :
//              This uart library emulates the operation of a UART (serial port) using
//      the AVR's hardware timers, I/O pins, and some software.
//
//      Specifically, this code uses:
//              -Timer 2 Output Capture for transmit timing
//              -Timer 0 Output Capture for receive timing
//              -External Interrupt 2 for receive triggering
//
//      The above resources cannot be used for other purposes while this software
//      UART is enabled.  The overflow interrupts from Timer0 and Timer2 can still
//      be used for other timing, but the prescalers for these timers must not be
//      changed.
//
//      Serial output from this UART can be routed to any I/O pin.  Serial input
//      for this UART must come from the External Interrupt 2 (INT2) I/O pin.
//      These options should be configured by editing your local copy of
//      "uartsw2conf.h".
//
// This code is distributed under the GNU Public License
//              which can be found at http://www.gnu.org/licenses/gpl.txt
//
//*****************************************************************************

#ifndef UARTSW2CONF_H
#define UARTSW2CONF_H

// constants/macros/typdefs

#define UARTSW_RX_BUFFER_SIZE   0x20    ///< UART receive buffer size in bytes

#define UARTSW_INVERT                                   ///< define to invert polarity of RX/TX signals
// when non-inverted, the serial line is appropriate for passing though
// an RS232 driver like the MAX232.  When inverted, the serial line can
// directly drive/receive RS232 signals to/from a DB9 connector.  Be sure
// to use a current-limiting resistor and perhaps a diode-clamp circuit when
// connecting incoming RS232 signals to a microprocessor I/O pin.

// if non-inverted, the serial line idles high (logic 1) between bytes
// if inverted, the serial line idles low (logic 0) between bytes


// UART transmit pin defines
#define UARTSW_TX_PORT                  PORTB   ///< UART Transmit Port
#define UARTSW_TX_DDR                   DDRB    ///< UART Transmit DDR
#define UARTSW_TX_PIN                   PB3             ///< UART Transmit Pin

// UART receive pin defines
// This pin must correspond to the
// External Interrupt 2 (INT2) pin for your processor
#define UARTSW_RX_PORT                  PORTB   ///< UART Receive Port
#define UARTSW_RX_DDR                   DDRB    ///< UART Receive DDR
#define UARTSW_RX_PORTIN                PINB    ///< UART Receive Port Input
#define UARTSW_RX_PIN                   PB2             ///< UART Receive Pin

#endif