System_simulation.zip_倒计时仿真_共阳极 仿真

ORG 00H AJMP MAIN ORG 03H AJMP NT0 ORG 30H MAIN: MOV P1,#00H SETB P3.5 CLR P3.6 CLR P3.0 CLR P3.1 CLR 00H CLR 01H MOV 34H,#09H MOV 35H,#09H MOV R1,#04H MOV R2,#05H MOV R3,#0F8H MOV DPTR,#TABLE MOV TMOD,#01H MOV IE,#81H LOOP: JNB 01H,LOOP MOV A,R4 MOV B,#10 DIV AB MOV R0,A MOV R1,B ACALL DISP DJNZ R3,LOOP MOV R3,#0F8H DEC R4 CJNE R4,#00,LOOP SETB P3.6 ACALL DELAY1S CLR P3.6 MOV R4,24H AJMP LOOP DISP: MOV A,R1 MOVC A,@A+DPTR MOV P1,A SETB P3.0 ACALL DELAY CLR P3.0 MOV A,R0 MOVC A,@A+DPTR MOV P1,A SETB P3.1 ACALL DELAY CLR P3.1 RET NT0: CLR EX0 CLR ET0 CLR 01H PUSH ACC PUSH PSW ACALL DIS1 KEY: JB P3.2,RETURN KEY0: ACALL DIS1 JNB P3.2,KEY0 KEY2: JB P3.3,KEY3 ACALL DIS1 INC 34H MOV A,34H CJNE A,#0AH,KEY22 MOV 34H,#00H KEY22: ACALL DIS1 JNB P3.3,KEY22 AJMP KEY2 KEY3: ACALL DIS1 JB P3.4,KEY1 INC 35H MOV A,35H CJNE A,#0AH,KEY33 MOV 35H,#00H KEY33: ACALL DIS1 JNB P3.4,KEY33 AJMP KEY3 KEY1: ACALL DIS1 JB P3.2,KEY2 KEY10: ACALL DIS1 JNB P3.2,KEY10 ACALL BCDBIN SETB 01H RETURN: SETB EX0 SETB ET0 MOV R3,#0F8H POP PSW POP ACC RETI BCDBIN: MOV B,#10 MOV A,34H MUL AB ADD A,35H MOV 24H,A MOV R4,24H RET DIS1: MOV R0,#34H MOV DPTR,#TABLE MOV A,@R0 MOVC A,@A+DPTR MOV P1,A SETB P3.1 CLR P3.0 ACALL DELAY CLR P3.1 INC R0 MOV A,@R0 MOVC A,@A+DPTR MOV P1,A SETB P3.0 ACALL DELAY CLR P3.0 RET DELAY: MOV R7,#19 D1: MOV R6,#25 D2: DJNZ R6,D2 DJNZ R7,D1 RET DELAY1S:MOV R7,#20 DEL1: MOV R6,#100 DEL2: MOV R5,#248 DJNZ R5,$ DJNZ R6,DEL2 DJNZ R7,DEL1 RET TABLE: DB 0C0H,0F9H,0A4H,0B0H,99H,92H, 82H ,0F8H,80H,90H END