PIC学习实例<<蠕动灯>>

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PIC学习实例<<蠕动灯>>

作者：power 来源：网络点击：日期：2007-09-04

;蠕动灯 07/8/30
;******定义寄存器*******
  pcl   equ   02h
  status  equ   3h
  z      equ   2h
  intcon  equ   0bh
  portc  equ   7h
  trisc  equ   87h
  count  equ   20h
  rp0    equ   5h
  tmr1l  equ   0eh
  tmr1h  equ   0fh
  pir1   equ   0ch
  pie1   equ   8ch
  t1con  equ   10h
  tmr1lb  equ   0dch
  tmr1hb  equ   0bh
;******复位和中断矢量*********
   org   0000h
   nop
   goto  main
   org   0004h
;*******tmr1延时子程序(1/4s)***
delay
    bcf    pir1,0
    bcf    t1con,0
    movlw  tmr1lb
    movwf  tmr1l
    movlw  tmr1hb
    movwf  tmr1h
    movf   count,0
    call   read
    movwf   portc
    incf    count,1
    movlw   .40
    subwf   count,0
    btfsc   status,z
    clrf    count
    bsf   t1con,0
    retfie
;********主程序*****************
main
    bsf   status,rp0
    movlw  00h
    movwf   trisc
    bsf    pie1,0
    bcf    status,rp0
    movlw   24h
    movwf   t1con
    movlw   0c0h
    movwf   intcon
    clrf    count
    movlw   tmr1lb
    movwf   tmr1l
    movlw   tmr1hb
    movwf   tmr1h
    bsf    t1con,0
loop
     goto  loop
;*********读出显示值************
read
      addwf   pcl,1
      retlw   b'10000000'
      retlw   b'11000000'
      retlw   b'11100000'
      retlw   b'11110000'
      retlw   b'11100000'
      retlw   b'11000000'
      retlw   b'11100000'
      retlw   b'11110000'
      retlw   b'11111000'
      retlw   b'11110000'
      retlw   b'11100000'
      retlw   b'11110000'
      retlw   b'11111000'
      retlw   b'11111100'
      retlw   b'11111000'
      retlw   b'11110000'
      retlw   b'11111000'
      retlw   b'11111100'
      retlw   b'11111110'
      retlw   b'11111100'
      retlw   b'11111000'
      retlw   b'11110000'
      retlw   b'11111000'
      retlw   b'11111100'
      retlw   b'11111110'
      retlw   b'11111111'
      retlw   b'11111110'
      retlw   b'11111100'
      retlw   b'11111000'
      retlw   b'11111100'
      retlw   b'11111110'
      retlw   b'11111111'
      retlw   b'11111110'
      retlw   b'11111100'
      retlw   b'11111110'
      retlw   b'11111111'
      retlw   b'11111110'
      retlw   b'11111111'
      retlw   b'00000001'
      retlw   b'11111111'
          end
已调试能过,学习TMR1定时应用.TMR1为16位计数定时器.

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