.def tmp = r16
.def mask = r17

.cseg
	rjmp reset

.org $00C
	rjmp blink

reset:
	ldi tmp, high(RAMEND)
	out SPH, tmp
	ldi tmp, low(RAMEND)
	out SPL, tmp

	ldi tmp, (1 << 3)
	out DDRA, tmp
	out PORTA, tmp

	ldi mask, (1 << 3)

	ldi tmp, 0
	out TCCR1A, tmp

	ldi tmp, (1 << WGM12) | (1 << CS11) | (1 << CS10)
	out TCCR1B, tmp

	; f_co1a = f_clk / (2 * N * (1 + OCR1A))			f_oc1a zadan u zadatku
	; 5 = 7372800 / (2 * 64 * (1 + OCR1A))
	; OCR1A = 7372800 / (2 * 64 * 5) - 1
	; OCR1A = 11519

	ldi tmp, high(11519)
	out OCR1AH, tmp
	ldi tmp, low(11519)
	out OCR1AL, tmp

	ldi tmp, (1 << OCIE1A)
	out TIMSK, tmp

	sei

main:
	rjmp main


blink:
	in tmp, PORTA
	eor tmp, mask
	out PORTA, tmp
reti