#include <avr/io.h>
#include <avr/interrupt.h>
#include <stdio.h>

static int uart_putchar(char c, FILE *stream);
static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL,_FDEV_SETUP_WRITE);


ISR (SIG_UART_RECV)
{
	printf("OK");
	
}

void inituart(void)
{
	UCSRB = (1<<TXEN)|(1<<RXEN)|(1<<RXCIE);		//Enable Receiver,Transmitter, Receiver-Interrupt)´	
	UBRRH = 0;					//Setting for 9600Baud
	UBRRL = 103;					//Setting for 9600Baud	
	UCSRC = (1<<URSEL)|(3<<UCSZ0);			//Asynconous Operation 8N1
	}

static int uart_putchar(char c, FILE *stream)
{
	if (c == '\n')
		uart_putchar('\r',stream);
	
	loop_until_bit_is_set(UCSRA, UDRE);
	UDR = c;
	return (0);
}


int main (void)
{
	inituart();
	stdout = &mystdout;	
	sei();
	
	printf("HALLO!");
	
	while(1)
	{}
}