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1. 实锟斤拷目锟斤拷

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锟斤拷片锟斤拷PIC16F886一片锟斤拷LED锟斤拷一只锟斤拷锟斤拷锟斤拷锟斤拷选锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷氐锟斤拷撸锟揭伙拷锟�

4. 实锟介方锟斤拷

图 1 硬锟斤拷锟斤拷锟酵�

图 2 锟斤拷锟斤拷锟斤拷锟斤拷图

锟斤拷锟斤拷锟斤拷蹋锟窖★拷锟�Timer0锟斤拷锟节诧拷锟斤拷锟斤拷频锟斤拷31KHz锟斤拷要锟斤到锟斤拷锟斤拷为1s锟斤拷锟斤拷0.5s锟斤拷转一锟轿ｏ拷锟斤拷0.5s锟斤拷锟斤拷要执锟叫碉拷指锟斤拷锟斤拷锟斤拷0.5*31k/4=3875,锟斤拷锟斤拷使TMR0锟斤拷0锟接碉拷锟斤拷锟斤拷锟皆わ拷锟斤拷锟轿�0锟斤拷锟斤拷3875/256=15.136.锟斤拷么锟斤拷频锟饺匡拷选1:16,1:32,1:64,1:128,1:256.锟斤拷锟斤拷选锟斤拷锟斤拷锟斤拷咏锟斤拷锟�1:16.

预锟斤拷锟斤拷锟斤拷锟斤拷锟姐：

3875/16=256-T+2

锟斤拷T=15.8锟斤拷锟斤拷锟斤拷实锟解发锟斤拷15锟斤拷16锟斤拷锟斤拷锟接斤拷锟斤拷锟斤拷取15.

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锟斤拷锟斤拷锟狡猴拷没锟叫地凤拷锟斤拷锟斤拷锟矫碉拷锟斤拷锟斤拷锟矫达拷锟诫，锟斤拷锟斤拷锟斤拷锟矫伙拷胁锟斤拷谩锟斤拷锟揭诧拷锌锟斤拷锟斤拷锟斤拷锟轿拷钥锟斤拷锟斤拷么锟斤拷氩伙拷锟斤拷狻ｏ拷锟�

实锟斤拷锟斤拷锟秸斤拷锟斤拷锟�

1锟斤拷LED锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷同锟斤拷没锟斤拷锟斤拷锟斤拷锟斤拷锟�

2锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时T=0.9999483s,锟斤拷锟斤拷小锟斤拷

锟斤拷锟斤拷

#INCLUDE p16f886.inc

__config _CONFIG1, _LP_OSC & _PWRTE_OFF & _WDT_OFF & _CP_OFF

ORG 0x00

NOP

CLRF TMR0

BANKSEL OPTION_REG;BANK3

MOVLW B'000011'

MOVWF OPTION_REG

BANKSEL INTCON;

MOVLW B'00000111'

ANDWF INTCON,F

BANKSEL OSCCON

MOVLW B'00000011'

MOVWF OSCCON

BANKSEL ANSEL

CLRF ANSEL

BANKSEL TRISA;BANK1

MOVLW B'00000000'

MOVWF TRISA

BANKSEL INTCON

BTFSS INTCON,2

GOTO LP

GOTO LED

LED

BANKSEL INTCON

BCF INTCON,2

BANKSEL PORTA

COMF PORTA,1

BANKSEL TMR0

MOVLW B'00001111'

MOVWF TMR0

GOTO LP

END

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2. 锟斤拷锟斤拷要锟斤拷

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