gistfile1.txt

uint8_t machine_clk = 0;

void machine_init(void)
{
    TCCR2A  =   (1 << WGM21) | (0 << WGM20)         // Timer 2 in Mode 2 = CTC (clear on compar  e)
            | (0 << COM2A1) | (0 << COM2A0)         // do nothing with OC2A
            | (0 << COM2B1) | (0 << COM2B0);        // do nothing with OC2B
    TCCR2B  =   (0 << WGM22)                        // Timer 0 in Mode 2 = CTC (clear on compar  e)
            | (0 << FOC0A) | (0 << FOC0B)           // dont force outputs
            | (1 << CS22)                           // clock enabled, prescaller = 1024
            | (1 << CS21)
            | (1 << CS20);
    OCR2A   =   240;                                // Comrapre A value for 150hz?
    TIMSK2 |=   (1 << OCIE2A);                      // Activates TIMER2_COMPA_vect ISR
}

ISR(TIMER2_COMPA_vect)
{
    machine_clk = 1;
}

void main(void)
{
  machine_init();
  sei();
  
  for(;;){
  
      if(machine_clk){
            machine_clk = 0;
            // CODE HERE
      }
      
  }
}