UART1 am ATmega128

/*

 * TestUARTATmega128.c

 *

 * Created: 18.01.2016 13:52:28

 * Author : Jens

 */ 

#include <avr/io.h>

#define F_CPU 800000L

#define BAUD 9600L

#define MYUBRR F_CPU/16/BAUD-1

void debug_message(char *pt);

void init_uart2(uint32_t baudRate);

int main(void)

{

    uint8_t output;

    // Init UART

  init_uart2(MYUBRR);

    while (1) 

    {

    debug_message("Test\n\r");

    }

}

// Transmit a message through the debug interface (UART2)

void debug_message(char *pt)

{

  while(*pt != '\0')

  {

    while(!(UCSR1A & (1<<UDRE1))); // Wait while transmitter is busy

    UDR1 = *pt; // Write data to output register

    pt++;

  }

}

void init_uart2(uint32_t baudRate)

{

  uint8_t output;

  UBRR1L = (unsigned char) baudRate;   // Baudrate Low Byte

  UBRR1H = (unsigned char) (baudRate >> 8); // High Byte

  UCSR1B |= (1<<TXEN1) | (1<<RXEN1) | (1<<RXCIE1); // Enable receiver, transmitter and receive interrupt

  UCSR1C |= (1<<UCSZ11) | (1<<UCSZ10); // Data format 8N1

  output = UDR1;                         // Reset receive register

}