liushuixian.asm

51控制led顺序点亮, 通过控制p0.0使其能按不同的顺序

	ORG 0000H
	LJMP MAIN
	ORG 0200H
    MAIN:clr p1.1
         clr p1.2
         ljmp MAIN
         END
         setb c

	MOV P1,#0FFH
	MOV SP,#6FH
        JNB P0.1,$
	ANL P1,#0FEH
      S:LCALL DELAY
	MOV A,P1
	RLC A
	MOV P1,A
        JNB P0.0 ,S1
	SJMP S
      S1:LCALL DELAY
	MOV A,P1
	RRC A
	MOV P1,A
	JB P0.0, S
	SJMP S1
     DELAY:MOV R1,#200
     DEL1:MOV R2,#123
          NOP
     DEL2:DJNZ R2,DEL2
	  DJNZ R1,DEL1
	  RET
	END