内容发布更新时间 : 2024/5/7 3:12:20星期一 下面是文章的全部内容请认真阅读。

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CLOCK:

MOV TH0,#3CH MOV TL0,#0B0H DJNZ 50H,RETURN MOV 50H,#14H

MOV A,#01H ADD A,32H .

DA A

MOV 32H,A

CJNE A,#60H,RETURN MOV 32H,#00H

MOV A,#01H ADD A,31H DA A

MOV 31H,A

CJNE A,#60H,RETURN MOV 31H,#00H

MOV A,#01H ADD A,30H DA A

MOV 30H,A

CJNE A,#24H,RETURN MOV 30H,#00H

RETURN:

RETI LED:

MOV A,@R0 SWAP A

ANL A,#0FH ACALL CTAB MOV R2,A

MOV A,@R0 ANL A,#0FH LCALL CTAB MOV R3,A

.

MOV DPTR,#8002H MOV A,R1 MOVX @DPTR,A MOV DPTR,#8004H MOV A,R2 MOVX @DPTR,A MOV A,R1 RR A MOV R1,A .

LCALL DLY

MOV DPTR,#8002H MOV A,R1 MOVX @DPTR,A MOV DPTR,#8004H MOV A,R3 MOVX @DPTR,A MOV A,R1 RR A MOV R1,A LCALL DLY

INC R0

CJNE R0,#33H,LED LJMP SLED CTAB:

PUSH DPH PUSH DPL

MOV DPTR,#TAB MOVC A,@A+DPTR POP DPL POP DPH RET

INPUT:

CLR RI CLR EA

MOV 30H,SBUF JNB RI,$ CLR RI

MOV 31H,SBUF JNB RI,$

.

CLR RI

MOV 32H,SBUF .

SETB EA RETI TAB:

DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH DLY:

MOV R7,#02H DL:

MOV R6,#0FFH DL1:

DJNZ R6,DL1 DJNZ R7,DL RET END