捕獲.PNG (38.11 KB, 下載次數: 23)
下載附件
2019-5-23 17:23 上傳
- ORG 0100H
- START: MOV DPTR,#TAB1
- MOV R0,#3
- MOV R4,#0
- MOV P2,R0
- WAIT: MOV P0,#0FFH
- JNB P0.0,POS
- JNB P0.1,NEG
- MOV P2,#00H
- SJMP WAIT
- POS: MOV R4,#1
- MOV A,R4
- MOV A,@A+DPTR
- MOV P2,A
- ACALL DELAY
- AJMP KEY
- KEY: MOV P0,#03H
- JB P0.0,NR1
- INC R4
- CJNE R4,#9,LOOP
- MOV R4,#1
- LOOP: MOV A,@A+DPTR
- MOV P2,A
- ACALL DELAY
- AJMP KEY
- NR1: JB P0.1,START
- DEC R4
- CJNE R4,#0,LOOPN
- MOV R4,#8
- LOOPN: MOV A,R4
- MOVC A,@A+DPTR
- MOV P2,A
- ACALL DELAY
- AJMP KEY
- DELAY: MOV R6,#1
- DD1: MOV R5,#80H
- DD2: MOV R7,#0
- DD3: DJNZ R7,DD3
- DJNZ R5,DD2
- DJNZ R6,DD1
- RET
- TAB1: DB 00H,02H,06H,04H
- DB 0CH,08H,09H,01H,03H
- END
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