flash.asm

初学者参考：为89c51下P1口循环点亮程序

       org  00H
main:  mov a,#0feH
start: mov p1,a
       rl a
       acall delay
       ajmp start

delay: mov r3,#0aH
d1:    mov r4,#0c8H
d2:    mov r5,#0faH
       djnz r5,$
       djnz r4,d2
       djnz r3,d1
       ret
       end;