大家好,我自己编了个关于交通灯的程序
效果:
1、LED  左绿灯  右红灯    数码管 从7开始倒计
2、LED  左黄灯闪三下   右红灯
3、LED  左红灯  右绿灯    数码管 从9开始倒计
4、LED  左红灯  右黄灯闪三下
5、循环1

程序
data segment
ioport equ 0a400h-280h
io8255a equ ioport+288h
io8255c equ ioport+28ah
io8255ctr equ ioport+28bh
portc1 db 24h,44h,04h,44h,04h,44h,04h
       db 81h,82h,80h,82h,80h,82h,80h
       db 0ffh
led db 3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh
buffer1 db ?
data ends
code segment
     assume cs:code,ds:data
start:mov ax,data
      mov ds,ax
      mov dx,io8255ctr
      mov al,80h
      out dx,al
           
re_on:mov bx,0
on:   mov al,portc1[bx]
      cmp al,0ffh
      jz  re_on
      mov dx,io8255c
      out dx,al
      inc bx
      mov cx,9999
      test al,21h
      jz  de1
      
      push bx
      mov di,offset buffer1
      
      cmp al,81h
      jz red

green:mov byte ptr[di],7
      call loop1
      pop bx
      jmp on
red:  mov byte ptr[di],9
      call loop1     
      pop bx
      jmp on

de1:  mov di,0f000h
de0:  dec di
      jnz de0
      loop de1

      mov ah,1
      int 16h
      je on
exit: mov ah,4ch
      int 21h

loop1  proc
       mov cx,0ffffh
loop2: mov bl,[di]
       mov bh,0
       mov si,offset led
       add si,bx
       mov al,byte ptr[si]
       mov dx,io8255a
       out dx,al

       push cx
       mov cx,05000h
delay: loop delay
       pop cx
      
       loop loop2
      
       mov ah,01
       int 16h
       jne exit1

       dec byte ptr[di]
       jge loop1
            
exit1: ret
loop1 endp
     
code ends
      end start


我现在想实现黄灯闪三下时，数码管对应从3开始倒计，要怎么修改？
请跟我联系Email:jackson8634@