.include "C:\Program Files\Atmel\AVR Tools\AvrAssembler2\Appnotes\tn13Adef.inc"
.org 0

	rjmp reset	; Reset Handler
	reti		; IRQ0 Handler
	reti		; PCINT0 Handler
	rjmp timer_over	; Timer0 Overflow Handler
	reti		; EEPROM Ready Handler
	reti		; Analog Comparator Handler
	reti		; Timer0 CompareA Handler
	reti		; Timer0 CompareB Handler
	reti		; Watchdog Interrupt Handler
	reti		; ADC Conversion Handler

.def	temp	=	r16
.def	status	=	r17

reset:
	cli
	ldi	temp,	1<<4	;0b00010000
	out	ddrb,	temp
	clr	temp
	out	portb,	temp
	out	gimsk,	temp	;gifr
	out	pcmsk,	temp
	in	temp,	pinb
	in	temp,	pinb
		
	ldi	temp,	0b00000010	;CTC
	out	tccr0a,	temp
	ldi	temp,	0b00000100	;256
	out	tccr0b,	temp
	ldi	temp,	249
	out	ocr0a,	temp
	clr	temp
	out	ocr0b,	temp
	out	tcnt0,	temp
	out	wdtcr,	temp	;dwdr, osccal, spmcsr, gtccr, eearl, eedr, eecr, tifr0
	ldi	temp,	1<<toie0 ; || 1<<OCIE0A
	out	timsk0,	temp
	ldi	temp,	0b11	;1<<bods || 1<bodse
	out	bodcr,	temp
	ldi	temp,	0b10	;1<<bods || 0<bodse
	out	bodcr,	temp
	ldi	temp,	1<<pud || 1<<se
	out	mcucr,	temp	;mcusr

	ldi	temp,	1<<pradc
	out	prr,	temp
	ldi	temp,	1<<clkpce
	out	clkpr,	temp
	clr	temp
	out	clkpr,	temp
	out	admux,	temp
	out	adcsra,	temp	;adch, adcl, sreg
	out	adcsrb,	temp
	ldi	temp,	0b10000000
	out	acsr,	temp
	ldi	temp,	0b00111111
	out	didr0,	temp

;	clr	temp
;	ser	status
;	mov	zl,	temp
;	mov	zh,	temp
;dummy:	eor	temp,	status
;	out	portb,	temp
;decrement:
;	sbiw	zh:zl,	1
;	brne	decrement
;	rjmp	dummy


	ldi	temp,	0x9F
	out	spl,	temp

	ldi	temp,	1<<4
	mov	status, temp
	sei
sleeping:
;	sleep
	rjmp	sleeping

timer_over:	; 128kHz/(2*256*250)= 1Hz
	eor	temp,	status
	out	portb,	temp
	reti