4.2 源程序

ORG 0000H ;中斷入口程序;

LJMP START

ORG 0003H

RETI

ORG 000BH

RETI

ORG 0013H

RETI

ORG 001BH

RETI

CLEAR: RET; ; 初始化程序

;START:ACALL CLEAR ; 主 程 序

STAR1:MOV P3,#0FFH

JNB P3.2,FUN2

JNB P3.3,FUN3 ;關(guān)閉按紐

JNB P3.4,FUN0

JNB P3.5,FUN1

JNB F0,STAR1 ;曾經(jīng)有鍵按下F0置1

RET;

FUN0:LCALL DL10MS ;消除抖動

JB P3.4,STAR1

WAITL0:JNB P3.4,WAITL0 ;等待鍵釋放

SETB F0

FUN01:LCALL FUN00

LCALL STAR1

LJMP FUN01;

FUN1:LCALL DL10MS ;消除抖動

JB P3.5,STAR1

WAITL1:JNB P3.5,WAITL1 ;等待鍵釋放

SETB F0

FUN10:LCALL FUN11

LCALL STAR1

LJMP FUN10;

FUN2:LCALL DL10MS ;消除抖動

JB P3.2,STAR1

WAITL2:JNB P3.2,WAITL2 ;等待鍵釋放

SETB F0

FUN20:LCALL FUN22

LCALL STAR1

LJMP FUN20;

FUN3:LCALL DL10MS ;消除抖動

JB P3.3,STAR1

WAITL3:JNB P3.3,WAITL3 ;等待鍵釋放

CLR F0

MOV P1,#0FFH ;關(guān)顯示

LJMP STAR1;

FUN00:MOV A,#0FEH ;從P1.0到P1.7移動點(diǎn)亮

FUN000:MOV P0,A

LCALL DL05S

JNB ACC.7,OUT

RL A

AJMP FUN000

OUT: RET;

FUN11:MOV A,#0FEH ;從P1.0到P1.7依次點(diǎn)亮

FUN111:MOV P1,A

LCALL DL05S

JZ OUT

RL A

ANL A,P1

AJMP FUN111;

FUN22:MOV A,#0FEH ;間隔點(diǎn)亮

FUN222:MOV P1,A

LCALL DL01S

CPL A

RL A

MOV P1,A

LCALL DL01S

RET;

FUN33: MOV A,#01H ;逐點(diǎn)熄滅

FUN333: MOV P1,A

LCALL DL01S

JNZ OUT

RL A

ORL A,P1

AJMP FUN333

DL01S:MOV R2,#0FFH ; 延時程序

MOV R7，#02H

LOOP1: DJNZ R2,LOOP1

LOOP5：DJNZ R7，DL512

RET

DL10MS:MOV R3,#14H

LOOP2: LCALL DL512

DJNZ R3,LOOP2

RET

DL05S:MOV R4,#0AH

LOOP3: LCALL DL10MS

DJNZ R4,LOOP3

RET

DL30S:MOV R5,#03H

LOOP4:LCALL DL05S

DJNZ R5,LOOP4

RET

END

4.2一秒鐘定時程序

MOV B,#0AH ;允許中斷

MOV TMOD,#01H ;工作方式1

MOV TH0,#0B0H

MOV TL0,#3CH

SETB TR0 ;啟動計(jì)數(shù)

SETB EA ;開中斷

BU:JBC TF0,SHI

SJMP BU

SHI:MOV TH0,#3CH

MOV TL0,#0B0H

RET