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e8658d5
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master
flaneth
firmware.dartboard
uart.c
initial commit after making CF identify work
Stefan Schuermans
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e8658d5
at 2012-04-15 19:57:57
uart.c
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/* flaneth - flash and ethernet - dartboard mod * version 0.1 date 2008-11-09 * Copyright (C) 2007-2008 Stefan Schuermans <stefan@schuermans.info> * Copyleft: GNU public license V2 - http://www.gnu.org/copyleft/gpl.html * a BlinkenArea project - http://www.blinkenarea.org/ */ #include <stdio.h> #include <avr/io.h> #include <avr/wdt.h> #include "macros.h" #include "uart.h" #define BAUD_RATE 38400 // initialize void UartInit( void ) // (extern) { // enable transmission UCSR0B = 1<<TXEN; // set baudrate (16MHz crystal) UBRR0L = 16000000 / (BAUD_RATE * 16L) - 1; // set STDOUT to use UartPutchar fdevopen( UartPutchar, NULL ); } // write a character int UartPutchar( char c, FILE * file ) // (extern) { // wait until last character was sent while( bit_is_clear( UCSR0A, UDRE ) ) wdt_reset( ); // send character UDR0 = c; return 0; file = NULL; // keep compiler happy }
