PIC中斷匯編例程

listp=16f876

#include

;--------------------------

;定時(shí)計(jì)數(shù)單元

HW_TIMEEQU0X40

;-----------------------------

;定時(shí)常數(shù)

HW_TIMECT0EQU0XDF;TMR0定時(shí)器時(shí)間常數(shù)，載波信號頻率37.88KHz(13.2us)

HW_TIMECT1EQU0X64;發(fā)送信號位間隔，*(1.32ms)

HW_TIMECT3EQU0X31;

;-------------------------------------

ORG0X00

GOTOHW_RECEIVE

;------------------------------------

ORG0X04

GOTOINT

;---------------------------------------

bcfINTCON,GIE

BCFINTCON,T0IF;(T0IF)定時(shí)器溢出標(biāo)志位清零

BCFINTCON,T0IE;關(guān)TMR0中斷(T0IE)位清零

BANKSELOPTION_REG

CLRFOPTION_REG

BANKSELHW_TIME

MOVLWHW_TIMECT3

MOVWFHW_TIME

MOVLWHW_TIMECT0

MOVWFTMR0

BANKSELINTCON

BSFINTCON,T0IE

BSFINTCON,GIE

INT;中斷

movwfW_TEMP

movfSTATUS,0

bcfSTATUS,RP0;workinginbank0

movwfSTATUS_TEMP

MOVLWHW_TIMECT0

MOVWFTMR0;重裝定時(shí)常數(shù)

BCFINTCON,T0IF;清除中斷溢出標(biāo)志位(T0IF)

;----------------------------------------------------------------------

DECFSZHW_TIME,1;為零，間跳，定時(shí)時(shí)間到

GOTOHW_LEAVE1

MOVLWHW_TIMECT1;重裝時(shí)間常數(shù)

MOVWFHW_TIME

BSFHW_Sign,1

HW_LEAVE1

BANKSELSTATUS_TEMP

MOVFSTATUS_TEMP,0

MOVWFSTATUS

MOVFW_TEMP

RETFIE