MAIN: ACALL CONV
ACALL DIS
AJMP MAIN
CONV: MOV A DI_DA(DI_DA为定时1MS的计数单元)
CJNE A,#64H,DONE(看时候到0.1S)
MOV DI_DA,#00H
MOV A,MSEC
ADD A,#01H
DA A
MOV MSEC,A
CJNE A,#0AH,DONE
MOV MSEC,#00H
MOV A,SEC
ADD A,#01H
DA A
MOV SEC,A
CJNE A,#0AH,DONE
MOV SEC,#00H
MOV A,MIN
ADD A,#01H
DA A
MOV MIN,A
CJNE A,#09H,DONE
MOV MIN,#00H
DONE:RET
DIS:MOV A,MSEC
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV DPTR,#42H
MOVX @DPTR,A
MOV DPTR,#40H
MOV A,#0F7H
MOVX @DPTR,A
NOP
NOP
NOP
MOV A,SEC
MOVC A,@A+DPTR
MOV DPTR,#42H
MOVX @DPTR,A
MOV DPTR,#40H
MOV A,#0FBH
MOVX @DPTR,A
NOP
NOP
NOP
NOP
MOV A,MIN
MOVC A,@A+DPTR
MOV DPTR,#42H
MOVX @DPTR,A
MOV DPTR,#40H
MOV A,#0FDH
MOVX @DPTR,A
NOP
NOP
NOP
RET
TAB: DB 0F0H,0F1H,0F2H,0F3H,0F4H
DB 0F5H,0F6H,0F7H,0F8H,0F9H
END
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