Timer0 Atmega 1280

ISR(TIMER0_COMPA_vect)

{

  // Testnachricht

  testnachricht();

}

int main(void)

{

/* Timer0 A

 * Prescaler=1024

 * Clear Timer on Compare

 * Compare Register A = 125 (16MHz / 1024 Presc / 125 = 125 Interrupts pro Sek)

      * Timer 0 Compare Interrupt freigeben  

      */

      OCR0A = 125;

      TIMSK0 |= 1 << OCIE0A;

      TCCR0A = TCCR0A | (1<<CS00) | (1<<CS02) | (1<<WGM01);

  // Global Interrupts freigeben

  sei();

while (1) {

}