PIC中斷匯編例程

listp=16f876

#include

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

;定時計數單元

HW_TIMEEQU0X40

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

;定時常數

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

HW_TIMECT1EQU0X64;發送信號位間隔，*(1.32ms)

HW_TIMECT3EQU0X31;

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

ORG0X00

GOTOHW_RECEIVE

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

ORG0X04

GOTOINT

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

bcfINTCON,GIE

BCFINTCON,T0IF;(T0IF)定時器溢出標志位清零

BCFINTCON,T0IE;關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;重裝定時常數

BCFINTCON,T0IF;清除中斷溢出標志位(T0IF)

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

DECFSZHW_TIME,1;為零，間跳，定時時間到

GOTOHW_LEAVE1

MOVLWHW_TIMECT1;重裝時間常數

MOVWFHW_TIME

BSFHW_Sign,1

HW_LEAVE1

BANKSELSTATUS_TEMP

MOVFSTATUS_TEMP,0

MOVWFSTATUS

MOVFW_TEMP

RETFIE