#include "main.h"
int counter = 0;

int main()
{
    // PortB initialisieren
  DDRB = DDRB | 0x0F; // RB0 - RB4 as output, other unchanged
  DDRD = DDRD | 0x0F; // RD0 - RD4 as output, other unchanged
  initTimer1();
  initInterrupts();
  while (1);
}

ISR (TIMER1_COMPA_vect){
  counter++;
  PORTB = (PORTB & 0xF0) | ((counter/10)%10 & 0x0F);
  PORTD = (PORTD & 0xF0) | (counter%10 & 0x0F);
}