流水灯.txt

//下面是画圆的程序

LJMP MAIN
MAIN : MOV A ,#01H;
       MOV P1 ,A;

LOOP : RL A;

LCALL DELAY;

      MOV P1, A;

      LJMP   LOOP;  

DELAY:
       MOV R1 ,#255 ;
       MOV R2 ,#255
HERE : DJNZ R1 ,HERE;

HERE1: DJNZ R2 ,HERE;

          RETI;