led慢慢亮.asm

我自己写的

ORG 0000H
MAIN:MOV P0,#0FFH
     MOV P3,#00H
     ACALL DEL1MS
     MOV R5,#0FFH
LOOP3:MOV P0,#0FFH
     DEC R5
     MOV A,R5
     ACALL DELAY
     MOV A,#0FFH
     SUBB A,R5
     MOV P0,#00H
     ACALL DELAY
     CJNE R5,#0,LOOP3
     ACALL DEL1MS
     MOV P0,#00H
     JMP $
DELAY:MOV R7,A
LOOP1:MOV R6,#15
      DJNZ R6,$
      DJNZ R7,LOOP1
      RET
DEL1MS:MOV R7,#20
LOOP0: MOV R6,#30
       DJNZ R6,$
       DJNZ R7,LOOP0
       RET
       END