ORG
0000H
LJMP START
ORG 000BH
LJMP TIMER0
ORG
0030H
START:MOV
SP,#60H
MOV
TMOD,#81H
;定時器0，1工作在方式1,0定時，1計數(shù)
MOV
IE,#8AH
;開定時器中斷
MOV
TL0,#0B0H
;定時器地低位初始化
MOV
P1,#21H
MOV
TH0,#3CH
MOV
30H,#00H;MS
MOV
31H,#00H;S
MOV
32H,#00H;RED
MOV
33H,#00H;YEL
SETB
TR0;
WAIT: JMP
WAIT
TIMER0:PUSH
PSW
PUSH
ACC
MOV
TL0,#0B0H;定時器重裝值
MOV
TH0,#3CH
INC
30H
MOV
A,30H
CJNE
A,#14H,EXIT
MOV
30H,#00H
INC
31H
MOV
A,31H
YEON: CJNE
A,#0AH,YEOFF;
CLR
P1.5
SETB
P1.4
SETB P1.0
SJMP EXIT
YEOFF: CJNE
A,#0DH,SRON;
CLR
P1.0
CLR
P1.4
SETB
P1.2
SETB P1.3
SJMP
EXIT
SRON: CJNE
A,#1AH,NEXT;
SETB
P1.1
SETB
P1.3
CLR P1.2
SJMP
EXIT
NEXT: CJNE
A,#1CH,EXIT
MOV
31H,#00H
SETB P1.0
SETB
P1.5
CLR
P1.1
CLR
P1.3
EXIT: POP
ACC
POP
PSW
RETI
END
