基于51单片机的带时间显示和紧急控制的交通灯的设计

                      LCALL STATUS2 ;南北绿灯闪转黄灯,东西红灯
                      LCALL STATUS3 ;南北红灯,东西绿灯
                      LCALL STATUS4 ;南北红灯,东西绿灯闪转黄灯
                      LJMP CIRCLE
INT_0:
                      PUSH PSW                    ;保护现场
                      PUSH 2
                      PUSH 90H  
                      clr                ex0      
                      MOV P1,#0FH                  ;南北,东西都亮红灯       
                      MOV R2,#100                 ;延时10秒
                      LCALL DELAY_DISPLAY
                      setb                ex0
                      POP 90H                     ;恢复现场       
                      POP 2
                      POP PSW
                      RETI
                INT_T1:
                      PUSH ACC
                      PUSH PSW
                      CLR                TR1
                      MOV                TL1,#00H                 ;延时 50mS 常数
                      MOV                TH1,#4CH        
                      SETB TR1
                      DJNZ R0,EXIT
                      MOV                R0,#2                   ;延时 100ms常数
                        DEC R2
                 EXIT:
                      POP                PSW
                      POP                ACC
                      RETI
      
STATUS0:                            ;南北红灯,东西红灯       
                      MOV P1,#0FH       
                      MOV R2,#10                  ;延时1秒
                      LCALL DELAY_DISPLAY
                      RET
STATUS1:                            ;南北绿灯,东西红灯        
                      MOV P1,#96H                  ;南北绿灯,东西红灯      
                      MOV R2,#200                 ;延时20秒
                      LCALL DELAY_DISPLAY
                      RET

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本文关键字：单片机  交通灯  51单片机，单片机-工控设备 - 51单片机