【正文】 按鍵消振 JC PPP ACALL DELAY MOV C, JC PPPSTOP3: MOV C, JNC STOP3 ACALL DELAY MOV C, JNC STOP3 CLR TR0 MOV A,27H CJNE A,01H,PPP MOV A,0FFH MOV 27H,A SETB TR0 AJMP PP1PPP: INC 27HPP1: POP PSW POP ACC RETITAB: DB 3FH 06H 5BH 4FH 66H 6DH 7DH 07H 7FH 6FHDELAY: MOV R1,40D1: MOV R7,50 DJNZ R7,$ DJNZ R1,D1 RET END附2：系統(tǒng)原理圖。INT0中斷修改。 緊急情況,東西（B道）方向,南北（A道）方向都是紅燈亮，其余燈滅 CLR CLR TAB3: MOV P0,0FFH MOV P2,0 MOV P2,1 MOV P2,4 MOV P2,5 LCALL TAB3 POP PSW POP ACC RETI 。INT1中斷修改。DELAYDL1: MOV R7,05HDL: MOV R6,0FFHDL6: DJNZ R6,$ DJNZ R7,DL RETDSEG1:DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH。DISP: MOV DPTR,DSEG1 MOV A,30H MOVC A,A+DPTR MOV P2,0EFH MOV P0,A LCALL DL1 MOV DPTR ,DSEG1 MOV A,31H MOVC A,A+DPTR MOV P2,0DFH MOV P0,A LCALL DL1 RET。定時器中斷。加一 MOV R5,40H INC R5 MOV 40H,R5 CJNE R5, 99,DSS MOV 40H,0 MOV 43H,0 LJMP DSS RRRR: MOV R5,41H INC R5 MOV 41H ,R5 MOV R5,42H INC R5 MOV 42H,R5 CJNE R5,99,DSS MOV 42H,0 MOV 41H,0 DSS: MOV A,R5 MOV B,0AH DIV AB MOV 31H,A MOV 30H,B ACALL DISPML10: JB ,M3M3: MOV C, 。判斷兩通道是否都有車 LCALL DELAY JB ,OUT4 JNB ,OUT4 LJMP DISPLAY2WAY4: JB ,OUT4 LCALL DELAY JB ,OUT4 LJMP DISPLAY1OUT4: JMP E4 SETIN4: LJMP SETT E4: JNB 4FH,LOOP4 CLR 4FH DEC R4 CJNE R4,0FFH,LOOP4 SETOUT : LJMP DISPLAY1 SETT: JB TR0,SETOUT ACALL DISP JB ,M1M1: MOV C, 。判斷兩通道是否都有車 LCALL DELAY JB ,OUT3 JNB ,OUT3 LJMP DISPLAY2WAY3: JB ,OUT3 LCALL DELAY JB ,OUT3 LJMP DISPLAY1OUT3: JMP E3 SETIN3: LJMP SETT E3 : JNB 4FH,LOOP3 CLR 4FH DEC R3 DEC R4 CJNE R3,0FFH,LOOP3 MOV P1, 0D1HLOOP4: MOV A, R4 。南北紅燈時間到,南北綠燈亮,東西紅燈亮 MOV R3, 41H 。東西綠燈滅黃燈亮LOOP2: MOV A, R3 MOV B, 0AH DIV AB MOV DPTR,TAB MOVC A,A+DPTR MOV P2,0F4H MOV P0,A LCALL DELAY MOV P2,0F0H MOV P0,A LCALL DELAY MOV P2, 0F6H MOV P0, A LCALL DELAY MOV A, B MOVC A,A+DPTR MOV P2,0F5H MOV P0,A LCALL DELAY MOV P2,0F1H MOV P0,A LCALL DELAY MOV P2, 0F7H MOV P0, A LCALL DELAY JNB TR0,SETIN2 JB ,WAY2 。顯示南北紅燈與東西綠燈時間 MOV R3, 40H MOV R4, 43H LOOP1: MOV A, R3 MOV B, 0AH DIV AB MOV DPTR,TAB MOVC A,A+DPTR MOV P2,0F0H MOV P0,A LCALL DELAY MOV A, B MOVC A,A+DPTR MOV P2,0F1H MOV P0,A