;**********************************************************************
;Ïðîãðàììà 1.1 äëÿ ìèêðîêîíòðîëëåðîâ ATx8515:
;ïåðåêëþ÷åíèå ñâåòîäèîäîâ (ÑÄ) ïðè íàæàòèè íà êíîïêó START (SW0),
;ïîñëå íàæàòèÿ êíîïêè STOP (SW1) ïåðåêëþ÷åíèå ïðåêðàùàåòñÿ è
;âîçîáíîâëÿåòñÿ c ìåñòà îñòàíîâêè ïðè ïîâòîðíîì íàæàòèè íà êíîïêó START
;**********************************************************************
;.include "8515def.inc" ;ôàéë îïðåäåëåíèé äëÿ AT90S8515
.include "m8515def.inc" ;ôàéë îïðåäåëåíèé äëÿ ATmega8515
.def temp = r16 ;âðåìåííûé ðåãèñòð
.def reg_led = r20 ;ðåãèñòð ñîñòîÿíèÿ ñâåòîäèîäîâ
.equ START = 0 ;0-îé âûâîä ïîðòà
.equ STOP = 1 ;1-ûé âûâîä ïîðòà
.org $000
rjmp init
;***Èíèöèàëèçàöèÿ***
INIT: ldi reg_led,0xFE ;ñáðîñ reg_led.0 äëÿ âêëþ÷åíèÿ LED0
sec ;C=1
set ;T=1 – ôëàã íàïðàâëåíèÿ
ser temp ;èíèöèàëèçàöèÿ âûâîäîâ
out DDRB,temp ; ïîðòà PB íà âûâîä
out PORTB,temp ;ïîãàñèòü ÑÄ
clr temp ;èíèöèàëèçàöèÿ
out DDRD,temp ; ïîðòà PD íà ââîä
ldi temp,0x03 ;âêëþ÷åíèå ‘ïîäòÿãèâàþùèõ’
out PORTD,temp ; ðåçèñòîðîâ ïîðòà PD (0-é, 1-é ðàçðÿäû)
WAITSTART: ;îæèäàíèå
sbic PIND,START ; íàæàòèÿ
rjmp WAITSTART ; êíîïêè START
LOOP: out PORTB,reg_led ;âûâîä íà èíäèêàòîðû
;***Çàäåðæêà (äâà âëîæåííûõ öèêëà)***

ldi r17,11
d0: ldi r18,250
d1: ldi r19,242
d2: dec r19
brne d2
dec r18
brne d1
dec r17
brne d0

sbic PIND,STOP ;åñëè íàæàòà êíîïêà STOP,
rjmp MM ; òî ïåðåõîä
rjmp WAITSTART ; äëÿ ïðîâåðêè êíîïêè START
MM: brts LEFT ;ïåðåõîä, åñëè ôëàã T óñòàíîâëåí
sbrs reg_led,0 ;ïðîïóñê ñëåäóþùåé êîìàíäû,
; åñëè 0-é ðàçðÿä reg_led óñòàíîâëåí
set ;T=1 - ïåðåêëþ÷åíèå ôëàãà íàïðàâëåíèÿ
ror reg_led ;ñäâèã reg_led âïðàâî íà 1 ðàçðÿä
rjmp LOOP ;ïåðåõîä íà ïðîâåðêó íàæàòèÿ STOP
LEFT: sbrs reg_led,7 ;ïðîïóñê ñëåäóþùåé êîìàíäû,
; åñëè 7-é ðàçðÿä reg_led óñòàíîâëåí
clt ;T=0 – ïåðåêëþ÷åíèå ôëàãà íàïðàâëåíèÿ
rol reg_led ;ñäâèã reg_led âëåâî íà 1 ðàçðÿä
rjmp LOOP