基于51单片机的带时间显示和紧急控制的交通灯的设计1

DELAY:                                  ;延时子程序
                      PUSH                0                          ;保存现场
                      PUSH                1
                      MOV                 0,#0H
DELAY1:
                      MOV                 1,#0H
                      DJNZ                1,$
                      DJNZ                0,DELAY1
                      POP                 1                          ;恢复现场
                      POP                 0
                      RET
   
DELAY_DISPLAY:                              ;延时和显示时间子程序       
                      PUSH 1
                      PUSH 0
                      push acc
loopwait: mov b,#10
                      mov a,2
                      div ab
                      mov b,#10
                      div ab
                      mov                r4,#1
                      mov                r5,a
                      LCALL DISLED                     ;显示秒高位
                      mov                r4,#0
                      mov                r5,b
                      LCALL DISLED                     ;显示秒低位
                     mov a,2
                     jnz                loopwait                     ;延时等待
                      pop                acc  
                      POP 0
                      POP 1       
                      RET
                LEDSEG: DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H ;'0,1,2,3,4,5,6,7'
                        DB 7FH,6FH,77H,7CH,39H,5EH,79H,71H ;'8,9,A,B,C,D,E,F'
                    END

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本文关键字：单片机  交通灯  自动控制-单片机，电子制作 - 自动控制-单片机