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

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

这个图无法编程的，以下以51单片机为例编程给你参考：

LED BIT P1.0

KEY BIT P1.4

ORG 0000H

LJMP MAIN

ORG 000BH

LJMP T0ISR

ORG 0030H

MAIN:

    MOV TMOD,#01H

    MOV TH0,#HIGH(65536-50000)

    MOV TL0,#LOW(65536-50000)

    SETB ET0

    SETB EA

    CLR A

LOOP:

    JB KEY,LOOP

    JNB KEY,$

    INC A

    CJNE A,#1,LOOP1

    CLR LED

    SJMP LOOP

LOOP1:

    CJNE A,#2,LOOP2

    SETB TR0

    MOV 清销R2,#10

    SJMP LOOP

LOOP3:

    CJNE A,#3,LOOP

    CLR A

    CLR TR0

 袭孙   SETB LED

    SJMP LOOP

T0ISR:

    CLR TR0

    MOV TH0,#HIGH(65536-50000)

    MOV TL0,#LOW(65536-50000)

   拍正链 SETB TR0

    DJNZ R2,T0E

    MOV R2,#10

    CPL LED

T0E:

    RETI

    END

第一次按者并下，LED亮，抬起后再次按下，LED灭，旅贺依次循环？

约定拆嫌派低有效

ORG 0000H

LJMP MAIN

ORG 000BH

LJMP T0ISR

ORG 0030H

MAIN:

MOV SP,#5FH

MOV TMOD,#01H

MOV TH0,#HIGH(65536-50000)

MOV TL0,#LOW(65536-50000)

SETB ET0

SETB EA

MOV 20H,#0

LOOP:

MOV A,P2

JB ACC.0,LP1

JB 00H,LP01

CLR P1.0

SETB 00H

SJMP LOOP

LP01:

SETB P1.0

CLR 00H

SJMP LOOP

LP1:

JB ACC.1,LP2

JB 01H,LP11

CLR P1.1

SETB 01H

SJMP LOOP

LP11:

SETB P1.1

CLR 01H

SJMP LOOP

LP2:

JB ACC.2,LP3

JB 02H,LP21

CLR P1.2

SETB 02H

SJMP LOOP

LP21:

SETB P1.2

CLR 02H

SJMP LOOP

LP3:

JB ACC.3,LP3

JB 03H,LP31

CLR P1.3

SETB 03H

SJMP LOOP

LP31:

SETB P1.3

CLR 03H

SJMP LOOP

LP4:

JB ACC.4,LP3

JB 04H,LP41

CLR P1.4

SETB 04H

SJMP LOOP

LP41:

SETB P1.4

CLR 04H

SJMP LOOP

LP5:

JB ACC.5,LP3

JB 05H,LP51

CLR P1.5

SETB 05H

SJMP LOOP

LP51:

SETB P1.5

CLR 05H

SJMP LOOP

LP6:

JB ACC.6,LP3

JB 06H,LP61

MOV R2,#0

SETB TR0

SETB 06H

SJMP LOOP

LP61:

SETB P1.6

CLR 06H

CLR TR0

SJMP LOOP

LP7:

JB ACC.7,LOOP

JB 07H,LP71

MOV R2,#0

SETB TR0

SETB 07H

LJMP LOOP

LP71:

SETB P1.7

CLR TR0

CLR 07H

LJMP LOOP

T0ISR:

CLR TR0

MOV TH0,#HIGH(65536-50000)

MOV TL0,#LOW(65536-50000)

SETB TR0

INC R2

MOV A,R2

CJNE A,#20,T01

T01:

JC T0E

MOV R2,#0

JNB 06H,T02

CPL P1.6

SJMP T0E

T02: JNB 07H,T0E

CPL P1.7

T0E:

RETI

END

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