h_15.asm

来自「单片机硬件实验代码」· 汇编 代码 · 共 25 行

        ORG      0000H
        SJMP     START
        ORG      0030H
 START: MOV      SP,#06H
  KEYH: JB       P1.7,$
        ACALL    DELAY
        JB       P1.7,KEYH
        CLR      P1.0
  KEYL: JNB      P1.7,$
        ACALL    DELAY
        JNB      P1.7,KEYH
        SETB      P1.0 
        SJMP      KEYH
        
   ;0.5s延时       
 DELAY:  MOV       R6,#5
    _A:  MOV       R5,#200
    _B:  MOV       R4,#250
         DJNZ      R4,$
         DJNZ      R5,_B
         DJNZ      R6,_A
         RET
               
         END