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Kod: Markera allt

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>

#include "../bits.h"

int main (void) {
	
	// Sätt alla IO-portar till utgångar, logiknivå hög
	DDRB = 0xFF;
	DDRC = 0xFF;
	DDRD = 0xFF;
	
	PORTB = 0xFF;
	PORTC = 0xFF;
	PORTD = 0xFF;
		
	// Väck logikanalysator
	PORTC = 0x00;
	_delay_ms(1);
	PORTC= 0xFF;
		
	// Ställ in TIMER1 för 1ms-interrupts
	TCCR1B |= (1<<WGM12) | (1<<CS10);
	TIMSK1 |= (1<<OCIE1A);
	TCNT1 = 0;
	OCR1A = 18432;
	
	sei();
	
	while(1) {
		asm volatile("nop" "\n\t");
		asm volatile("nop" "\n\t");
	}

}

SIGNAL(TIMER1_COMPA_vect) {
	PORTB = 0x00;
	_delay_us(10);
	PORTB = 0xFF;
}

Kod: Markera allt

   TCCR1A = 0;
   TCCR1B = (1<<WGM12) | (1<<CS10);
   TIMSK1 = (1<<OCIE1A);