.include "tn15def.inc"
.def temp =r16
.def pwm =r17
.cseg
.org $0000
;---------------------------------------------------------------
start:
			ldi	temp,0x62
			ldi	pwm,0x00
			out	TCCR1,temp
			ldi 	temp,0x02
			out	OCR1A,temp	
;---------------------------------------------------------------
INITPORTB:
			ser	Temp
			out	DDRB,Temp
			clr 	temp
			out 	PORTB,temp
;---------------------------------------------------------------
LOOP:
			sbic 	PINB,0x00
			rjmp 	down
			sbic 	PINB,0x02
			rjmp 	up
			rjmp 	loop
;---------------------------------------------------------------
UP:
			cpi 	pwm,255
			breq	max
			inc 	pwm
			out 	OCR1A,pwm
			rcall	delay
			rjmp 	loop
;---------------------------------------------------------------
MAX:
			ldi 	r20,0x10
			rjmp	loop
;---------------------------------------------------------------
MIN:
			ldi 	r21,0x08
			rjmp 	loop
;---------------------------------------------------------------
DOWN:
			cpi 	pwm,0
			breq	min
			dec 	pwm
			out 	OCR1A,pwm
			rcall 	delay
			rjmp 	loop
;---------------------------------------------------------------
DELAY:
			ldi  	R19, $43
LOOP0:			ldi  	R18, $C6
LOOP1:			dec  	R18
			brne 	LOOP1
			dec  	R19
			brne 	LOOP0
			nop
			ret