汇编51单片机三个LED交替闪烁

ORG 0000H

AJMP MAIN

ORG 000BH TO Time interrupt

lJMP T0INT

ORG 001BH T1 Count interrupt

LJMP T1CNT

ORG 030H

MAIN: MOV TMOD,#61H T1 count at MOD 2,T0 time int at MOD 1

MOV TL0,#0B0H 66536-50000=3CB0H 50000us=50ms=0.05s

MOV TH0,#3CH

SETB ET0 T0 interrupt enable

SETB TR0 T0 work

MOV TL1,#0FDH count num = 2

MOV TH1,#0FDH auto load 0FDH

SETB ET1

SETB TR1

SETB EA Enable all interrupt

MOV A,#28H 0.05s*40=2s

MOV P0,#0FEH

JMP $

ORG 060H

T0INT: CLR ET0 Disable T0 interrupt

CLR TF0 clr tf0

CPL P1.7

DEC A A--

JNZ T0RET A!=0 jmp

更改这里改灯闪烁

MOV A,P1

RR A

MOV P1,A

MOV A,#28H A==0A=40,

T0RET: SETB ET0 Enable interrupt

RETI

ORG 080H

当开关闭合时，三个LED同时亮灭闪烁运行，当开败渗关断开时，三个LED轮流点亮闪前颤烁运行，输察悔脊入口P1.3 P1.4 P2.3 开关P3.1

while(1)

{

if(P3^1==0)

{ P1^3 =0P1^4 =0P2.3=0delay_ms(500)

P1^3 =1P1^4 =1P2.3=1delay_ms(500)

}

else

{

P1^3 =0delay_ms(500)

P1^3 =1P1^4 =0delay_ms(500)

P1^4 =1P2.3=0delay_ms(500)

P2.3=1P1^3 =0delay_ms(500)

}

}

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