30秒.asm

此程序是液晶与数码管的结合.是初学者必须掌握的.可以为以后写综合程序有所帮助

        ORG 0000H
        AJMP MAIN
        ORG 0003H
        AJMP WIB
        ORG 000BH
        AJMP IP0
        ORG 0030H
        MAIN:MOV IE,#83H
        MOV TMOD,#01H
        MOV TH0,#3CH
        MOV TL0,#0B0H
        MOV TCON,#00H
        MOV R4,#14H
        MOV R0,#00H
        MOV R1,#00H
        MOV DPTR, #TAB
      L1:MOV A,R0
        MOVC A,@A+DPTR
        MOV P2,A
        MOV P0,#0FEH
        ACALL DAY
        MOV A,R1
        MOVC A,@A+DPTR
        MOV P2,A
        MOV P0,#0FDH
        ACALL DAY
        AJMP L1
     DAY:MOV R2,#28H
      L3:MOV R3,#7DH
      L2:NOP
         NOP
         DJNZ R3,L2
         DJNZ R2,L3
         RET
     TAB: DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH,77H,
     WIB:SETB TR0
         RETI
     IP0:MOV TH0,#3CH
         MOV TL0,#0B0H
         DJNZ R4,L5
         MOV R4,#14H
         INC R0
         CJNE R0,#0A0H, L5
         MOV R0,#00H
         INC R1
         CJNE R1,#03H, L5
         CLR TR0
       L5:RETI
         END