/*
  prescaller 8 , Xtal 16MHz
  tick = 8/16Mhz= 0.5 us
  delay=counter*tick
  delay=counter*1/2us
  untuk sampling rate 8 khz maka Tsampling= 1/8Khz= 125us
  counter = 125/0.5us = 250
*/

#include <avr/io.h>

void TimerInit();
unsigned char periode;

int main(void) {
  DDRB |= _BV(PB7);
  TimerInit();
  while (1) {
    if(TIFR0 & (1<<OCF0A)){
      PORTB ^= (1 << PB7);
      TIFR0 |= (1 << OCF0A);
    }
  }
}
void TimerInit(void) {
  TCCR0B = (1 << CS01) ; //prescaller 8
  TCCR1B |= _BV(WGM13) | _BV(WGM12); //mode Timer CTC
  ICR1 = 250;
}