51单片机汇编语言编程独立按键

四个按键，定义如下数耐：

KEY1 BIT P3.0

KEY2 BIT P3.1

KEY3 BIT P3.2

KEY4 BIT P3.3

按键处理程轿简序：薯帆春

-----------------------------------

READ_KEY:

JBKEY1, K2

CALL DELAY

JBKEY1, K2

JNB KEY1, $

PUSH ACC

INC 75H

MOV A, 75H

CJNE A, #10, ZINT01

MOV 75H, #0

ZINT01:

POP ACC

JMP K_EXIT

---------------

K2: JBKEY2, K3

CALL DELAY

JBKEY2, K3

JNB KEY2, $

PUSH ACC

INC 76H

MOV A, 76H

CJNE A, #10, ZINT01

MOV 76H, #0

ZINT01:

POP ACC

JMP K_EXIT

---------------

K3: JBKEY3, K4

CALL DELAY

JBKEY3, K4

JNB KEY3, $

PUSH ACC

DEC 75H

MOV A, 75H

CJNE A, #255, ZINT03

MOV 75H, #9

ZINT03:

POP ACC

JMP K_EXIT

---------------

K4: JBKEY4, K_EXIT

CALL DELAY

JBKEY4, K_EXIT

JNB KEY4, $

PUSH ACC

DEC 76H

MOV A, 76H

CJNE A, #255, ZINT04

MOV 76H, #9

ZINT04:

POP ACC

K_EXIT:

RET

---------------

DELAY:

DJNZ R7, $

DJNZ R7, $

RET

-----------------------------------

#include<reg52.h>

unsigned char ID

sbit k1 = 胡歼P3 ^ 7        // 定义按键端口

void delay()

{

TMOD = 0x10    // 定时器的工作方式

TH1=0xd8

TL1=0xf0

TR1=1

while(!TF1)    裤世冲// 这里错了，是定时器返喊1

TF1=0

}

void main()

{

while(1)

{

if(k1==0)

{

delay()              //去抖动

if(k1==0)           //检测按键确实按下，进行按键处理

{

ID++

if(ID==0)

{

ID=0

}

while(!k1)   //这里错了，多余的加了==0

}

}

switch(ID)

{

case 0:P1=0x3fbreak

case 1:P1=0x06break

case 2:P1=0x5bbreak

case 3:P1=0x4fbreak

case 4:P1=0x66break

case 5:P1=0x6dbreak

case 6:P1=0x7dbreak

case 7:P1=0x07break

case 8:P1=0x7fbreak

case 9:P1=0x6fbreak

default:break

}

}

}

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