L07Zneki_4

/*
#define F_CPU 7372800UL
*/
#include <avr/io.h>
#include <avr/interrupt.h>

ISR(TIMER1_COMPA_vect){
	PORTA ^= _BV(0);
}

int main(void){

	DDRA = _BV(0);
	PORTA = _BV(0);

	TCCR1A = _BV(WGM11) | _BV(WGM10);
	TCCR1B = _BV(CS10);
	OCR1A = 511;// 1023-> 0x03ff    1023*0.50     -> intenzitet LEDice je 100% na 1023

	TIMSK = _BV(OCIE1A);
	sei();

	while(1);
}