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<h1>uartsw2.h</h1><a href="uartsw2_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file uartsw2.h \brief Software Interrupt-driven UART Driver. */</span>
00002 <span class="comment">//*****************************************************************************</span>
00003 <span class="comment">//</span>
00004 <span class="comment">// File Name : 'uartsw2.h'</span>
00005 <span class="comment">// Title : Software Interrupt-driven UART Driver</span>
00006 <span class="comment">// Author : Pascal Stang - Copyright (C) 2002-2003</span>
00007 <span class="comment">// Created : 7/20/2002</span>
00008 <span class="comment">// Revised : 4/27/2004</span>
00009 <span class="comment">// Version : 0.6</span>
00010 <span class="comment">// Target MCU : Atmel AVR Series (intended for the ATmega16 and ATmega32)</span>
00011 <span class="comment">// Editor Tabs : 4</span>
00012 <span class="comment">//</span><span class="comment"></span>
00013 <span class="comment">/// \ingroup driver_sw</span>
00014 <span class="comment">/// \defgroup uartsw2 Software Interrupt-driven UART Driver (uartsw2.c)</span>
00015 <span class="comment">/// \code #include "uartsw2.h" \endcode</span>
00016 <span class="comment">/// \par Overview</span>
00017 <span class="comment">/// This uart library emulates the operation of a UART (serial port) using</span>
00018 <span class="comment">/// the AVR's hardware timers, I/O pins, and some software.</span>
00019 <span class="comment">///</span>
00020 <span class="comment">/// Specifically, this code uses:</span>
00021 <span class="comment">/// -Timer 2 Output Capture for transmit timing</span>
00022 <span class="comment">/// -Timer 0 Output Capture for receive timing</span>
00023 <span class="comment">/// -External Interrupt 2 for receive triggering</span>
00024 <span class="comment">///</span>
00025 <span class="comment">/// The above resources cannot be used for other purposes while this software</span>
00026 <span class="comment">/// UART is enabled. The overflow interrupts from Timer0 and Timer2 can still</span>
00027 <span class="comment">/// be used for other timing, but the prescalers for these timers must not be</span>
00028 <span class="comment">/// changed.</span>
00029 <span class="comment">///</span>
00030 <span class="comment">/// Serial output from this UART can be routed to any I/O pin. Serial input</span>
00031 <span class="comment">/// for this UART must come from the External Interrupt 2 (INT2) I/O pin.</span>
00032 <span class="comment">/// These options should be configured by editing your local copy of</span>
00033 <span class="comment">/// "uartsw2conf.h".</span>
00034 <span class="comment"></span><span class="comment">//</span>
00035 <span class="comment">// This code is distributed under the GNU Public License</span>
00036 <span class="comment">// which can be found at http://www.gnu.org/licenses/gpl.txt</span>
00037 <span class="comment">//</span>
00038 <span class="comment">//*****************************************************************************</span>
00039
00040 <span class="preprocessor">#ifndef UARTSW2_H</span>
00041 <span class="preprocessor"></span><span class="preprocessor">#define UARTSW2_H</span>
00042 <span class="preprocessor"></span>
00043 <span class="preprocessor">#include "<a class="code" href="global_8h.html">global.h</a>"</span>
00044 <span class="preprocessor">#include "<a class="code" href="buffer_8h.html">buffer.h</a>"</span>
00045
00046 <span class="comment">// include configuration</span>
00047 <span class="preprocessor">#include "<a class="code" href="uartsw2conf_8h.html">uartsw2conf.h</a>"</span>
00048
00049 <span class="comment">// constants/macros/typdefs</span>
00050
00051 <span class="comment">// functions</span>
00052 <span class="comment"></span>
00053 <span class="comment">//! enable and initialize the software uart</span>
00054 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="uartsw_8c.html#a9">uartswInit</a>(<span class="keywordtype">void</span>);<span class="comment"></span>
00055 <span class="comment">//! create and initialize the uart buffers</span>
00056 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="uartsw_8c.html#a10">uartswInitBuffers</a>(<span class="keywordtype">void</span>);<span class="comment"></span>
00057 <span class="comment">//! turns off software UART</span>
00058 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="uartsw_8c.html#a11">uartswOff</a>(<span class="keywordtype">void</span>);<span class="comment"></span>
00059 <span class="comment">//! returns the receive buffer structure </span>
00060 <span class="comment"></span><a class="code" href="structstruct__cBuffer.html">cBuffer</a>* <a class="code" href="uartsw_8c.html#a13">uartswGetRxBuffer</a>(<span class="keywordtype">void</span>);<span class="comment"></span>
00061 <span class="comment">//! sets the uart baud rate</span>
00062 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="uartsw_8c.html#a12">uartswSetBaudRate</a>(u32 baudrate);<span class="comment"></span>
00063 <span class="comment">//! sends a single byte over the uart</span>
00064 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="uartsw_8c.html#a14">uartswSendByte</a>(u08 data);
00065 <span class="comment"></span>
00066 <span class="comment">//! gets a single byte from the uart receive buffer</span>
00067 <span class="comment"></span><span class="comment">// Function returns TRUE if data was available, FALSE if not.</span>
00068 <span class="comment">// Actual data is returned in variable pointed to by "data".</span>
00069 <span class="comment">// example usage:</span>
00070 <span class="comment">// char myReceivedByte;</span>
00071 <span class="comment">// uartswReceiveByte( &myReceivedByte );</span>
00072 u08 <a class="code" href="uartsw_8c.html#a15">uartswReceiveByte</a>(u08* rxData);
00073 <span class="comment"></span>
00074 <span class="comment">//! internal transmit bit handler</span>
00075 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="uartsw_8c.html#a16">uartswTxBitService</a>(<span class="keywordtype">void</span>);<span class="comment"></span>
00076 <span class="comment">//! internal receive bit handler</span>
00077 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="uartsw_8c.html#a17">uartswRxBitService</a>(<span class="keywordtype">void</span>);
00078
00079 <span class="preprocessor">#endif</span>
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