MOV P0,#0F0H MOV A,P2 ANL A,#0FH XRL A,R2 JZ X3 MOV A,R0 XRL A,#0EH JZ COMPARE MOV A,R0 XRL A,#0FH JZ CLEAR MOV A,R0 MOV R1,#20H MOV R7,#04H CHANGE: XCH A,@R1 INC R1 DJNZ R7,CHANGE AJMP START2 COMPARE:CALL DISP MOV P0,#0F0H MOV DPTR,#TABLE MOV R6,#00H MOV R1,#20H MOV R4,#04H I1: MOV A,R6 MOVC A,@A+DPTR MOV 50H,@R1 CJNE A,50H,CLEAR INC R6 INC R1 DJNZ R4,I1 MOV R7,#05H I4: MOV R5,#00H I2: CLR P1.0 CALL DEL CALL DEL DJNZ R5,I2 MOV R5,#00H I3: SETB P1.0 CALL DEL CALL DEL DJNZ R5,I3 DJNZ R7,I4 AJMP CLEAR DISP: PUSH ACC MOV R1,#20H MOV A,@R1 SWAP A ORL A,#01H MOV P0,A CALL DEL INC R1 MOV A,@R1 SWAP A ANL P0,#0FH ORL A,#02H MOV P0,A CALL DEL INC R1 MOV A,@R1 SWAP A ANL P0,#0FH ORL A,#04H MOV P0,A CALL DEL INC R1 MOV A,@R1 SWAP A ANL P0,#0FH ORL A,#08H MOV P0,A CALL DEL POP ACC RET DEL: MOV R4,#00H DEL1: DJNZ R4,DEL1 RET TABLE: DB 04H,08H,03H,01H END ※ 编辑: D0248013 (182.155.162.53), 04/09/2016 00:05:43 ※ 编辑: D0248013 (182.155.162.53), 04/09/2016 01:17:48 ※ 编辑: D0248013 (182.155.162.53), 04/12/2016 16:13:15 ※ 编辑: D0248013 (182.155.162.53), 04/12/2016 16:14:39