Merkwürdiges Problem mit PCINT und UART

[Marten83]

So sieht er jetzt aus:

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include <util/delay.h>
#include <stdlib.h>
#include <string.h>
#include "uart.h"
#include "owi.h"


#define UART_BAUD_RATE      9600


ISR(PCINT_vect)
{
	//EIFR |= (1<<PCIF); //<--hat auch nicht geklappt
	uart_puts("A pin change interrupt occurred!");
}

int main(void)
{
	DDRB = 0x00; //set pins as output
	PORTB |= (1<<PB0) | (1<<PB1); //activate pullup
	PCMSK |= (1<<PCINT0) | (1<<PCINT1); //mask port
	GIMSK |= (1<<PCIE); //activate PCinterrupts
	EIFR |= (1<<PCIF); //clear interrupt flag
	
	uart_init( UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU) );
	sei();
	signed int temperatur;
	char s[20];
	char temp[5];
	while(1)
	{
		OWReset();
		OWWriteByte(0xcc); //skip rom
		OWWriteByte(0x44); //convert T
		_delay_ms(500);
		OWReset();
		OWWriteByte(0xcc);
		OWWriteByte(0xbe);
		temperatur = OWReadByte();
		temperatur |= (OWReadByte() << 8);
		temperatur = temperatur / 2;
		strcpy(s,"$PMBPS,");
		itoa(temperatur,temp,10);
		strcat(s,temp);
		uart_puts(s);
		uart_puts("\r\n");
		_delay_ms(500);
		
	}
	return 0;
}