NOKEY:
MOV A,P1 CPL A
JZ NOKEY MOV TEMP,P1 MOV A,P1
CJNE A,TEMP,NOKEY MOV R7,#16 MOV R2,#0
LOOP:MOV A,R2
MOV DPTR,#CODE_P0 MOVC A,@A+DPTR MOV P2,A INC R2 LCALL DL1S
DJNZ R7,LOOP SJMP START DL10ms:
MOV R6,#125 DL1: MOV R5,#98 NOP
DL2: DJNZ R5,DL2 DJNZ R6,DL1 RET
DL1s: MOV R4,#13 DL3: ACALL DL10ms DJNZ R4,DL3 RET
CODE_P0: DB 3FH,06H,5BH,4FH
DB 66H,6DH,7DH,07H
DB 7FH,6FH,77H,7CH
DB 39H,5EH,79H,71H
end
TEMP EQU 30H ORG 0000H
START: MOV SP,#5FH MOV P2,#73H MOV P1,#0FFH NOKEY:
MOV A,P1 CPL A
JZ NOKEY MOV TEMP,P1 MOV A,P1
CJNE A,TEMP,NOKEY MOV R7,#16 MOV R2,#0
LOOP:MOV A,R2
MOV DPTR,#CODE_P0 MOVC A,@A+DPTR MOV P2,A INC R2 LCALL DL1S
DJNZ R7,LOOP SJMP START DL10ms:
MOV R6,#125 DL1: MOV R5,#98 NOP
DL2: DJNZ R5,DL2 DJNZ R6,DL1 RET
DL1s: MOV R4,#13 DL3: ACALL DL10ms DJNZ R4,DL3 RET
CODE_P0: DB 3FH,06H,5BH,4FH
DB 66H,6DH,7DH,07H
DB 7FH,6FH,77H,7CH
DB 39H,5EH,79H,71H
end
