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<第5題>

;OFF(P0.3)優先,間隔 0.5 秒

;ON (P0.1)動作,摩擬霹靂燈

;MC1->MC2->MC3->MC4 (來回)

;七段顯示 1-> 2-> 3 -> 4 (來回)

ORG 0H
SJMP BEGIN
;---------------------
ORG 30H
BEGIN: MOV SP,#07H
MOV P1,#C0H
MOV P2,#00H
;-----------------------
WAIT: JNB P0.3,BEGIN
JNB P0.1,SURE
SJMP WAIT
;----------------------
SURE: MOV R5,#01H
ACALL DELAY
JNB P0.1,START
SJMP WAIT
;-----------------------
START: MOV P1,#F9H ;1
MOV P2,#01H
MOV R5,#04H
ACALL DELAY
MOV P1,#A4H ;2
MOV P2,#02H
MOV R5,#04H
ACALL DELAY
MOV P1,#B0H ;3
MOV P2,#04H
MOV R5,#04H
ACALL DELAY
MOV P1,#99H ;4