flaneth

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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
}
 
 
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