;for AVR:			ATmega16											  *
;clock frequency:	4MHz												  *
;**************************************************************************

;Programm function:

;--------------------------------------------------------------------------

.device ATmega16
.nolist
.include "m16def.inc"

;==========================================================================
;DECLARATIONS

.def	temp = r16
.def	merker = r17
.def	counter = r18

;==========================================================================
;START  Programm

	rjmp Init

;=========================================================================

Init:

	ser temp
	out DDRA, temp
	out DDRB, temp
	out DDRC, temp

	out PORTA, temp
	out PORTB, temp
	out PORTC, temp

	clr temp
	out DDRD, temp
	ser temp
	out PORTD, temp

;============================abfrage==================================================

taste1:

	sbic 	PIND,0
	rjmp 	taste1
	rjmp 	taste2

taste2:
	
	sbic	PIND,1
	rjmp	taste2
	rjmp	taste3

taste3:

	sbic	PIND,2
	rjmp	taste3
	rjmp	taste4

taste4:

	sbic	PIND,3
	rjmp	taste4


;==============================richtige Eingabe================================

	clr	temp
	out	PORTB, temp


timer:

	ldi 	temp, 0b00000101
	out	TCCR0, temp
	ldi	merker,117
	ldi	counter,100

warten:
	
	in	temp, TCNT0
	cp	temp, counter
	brne	warten
	subi	counter, -100
	dec	merker
	brne	warten

	ser 	temp
	out	PORTB, temp
	
	clr	temp
	out	TCCR0, temp
	out	TCNT0, temp

	rjmp	taste1



;================================timer2 für blinklicht===========================
		
timer2:

	ldi 	temp, 0b00000101
	out	TCCR0, temp
	ldi	merker,20
	ldi	counter, 100


warten2:
	
	in	temp, TCNT0
	cp	temp, counter
	brne	warten2
	subi	counter, -100
	dec	merker
	brne	warten2

	clr	temp
	out	PORTB, temp



;================================timer 3 blinklicht=====================================


	ldi 	temp, 0b00000101
	out	TCCR0, temp
	ldi	merker,20
	ldi	counter, 100

warten3:
	
	in	temp, TCNT0
	cp	temp, counter
	brne	warten3
	subi	counter, -100
	dec	merker
	brne	warten3

	ser	temp
	out	PORTB, temp


	rjmp	timer2