跑马灯8.asm

单片机写的程序都含有Protues仿真结果

       ;全亮全灭
      org 0000h           
      clr p3.0
      clr p3.1 
      clr p3.2
   r: mov p0,#00h
      lcall delay
      mov p0,#0ffh
      lcall delay
      ljmp r

delay:mov r1,#10
  kk3:mov r2,#250
  kk2:mov r3,#250
  kk1:djnz r3,kk1
      djnz r2,kk2
      djnz r1,kk3
      ret
      end