uart mit 2 mikrocontrollern

#include <avr/io.h>

#define F_CPU 16000000      

#define BAUD 9600                

#include "EB128_BBS2.h"

#include <util/delay.h>

#include "lcd.c"

void uart_init()

{

  //16mhz quarz extern

  //fuses ok

  //8bit keine parität 1 stopbit

  UBRR1H = (unsigned char) (((F_CPU/(16L*BAUD))-1) >> 8);

  UBRR1L = (unsigned char) ((F_CPU/(16L*BAUD))-1) & 0xff;

  UCSR1C = (0<<UMSEL1) | (0<<UPM1) | (0<<USBS1) | (1<<UCSZ1) | (1<<UCSZ0);

  UCSR1B = (1<<RXEN1) | (1<<TXEN1);

}

void uart_putc(unsigned char c)

{

  while ( ! ( UCSR1A & (1<<UDRE1))){

  ;

  }

  UDR1 = c;    // TRX1

}

void uart_puts(char * s)

{

    while (*s)

    {

      uart_putc(*s++);

    }

}

unsigned char uart_getc()

{

  return (UCSR1A & (1 << RXC1)) ? (char) UDR1 : 0;    //RX1

}

int main(void)

{

  DDRA=0xff;

  DDRB=0xff;

  DDRC=0xff;

  DDRE=0x00;

  DDRG=0x00;

    uart_init();

  while(1)

  {

    char get;

    get = uart_getc();

    if(get == 0x30) {

    LED = 0b00000001;

    }

    if(get == 0x31)

    {

    LED = 0b00000010;

    }

    if(TASTEN == 0b00000001)

    {

      char put = 0x30;

      uart_putc(put);

    }

    if(TASTEN == 0b00000010)

    {

      char put = 0x31;

      uart_putc(put);

    }

  }

return 0;

}