PIC中断汇编例程

listp=16f876

#include

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

;定时计数单元

HW_TIMEEQU0X40

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

;定时常数

HW_TIMECT0EQU0XDF;TMR0定时器时间常数，载波信号频率37.88KHz(13.2us)

HW_TIMECT1EQU0X64;发送信号位间隔，*(1.32ms)

HW_TIMECT3EQU0X31;

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

ORG0X00

GOTOHW_RECEIVE

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

ORG0X04

GOTOINT

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

bcfINTCON,GIE

BCFINTCON,T0IF;(T0IF)定时器溢出标志位清零

BCFINTCON,T0IE;关TMR0中断(T0IE)位清零

BANKSELOPTION_REG

CLRFOPTION_REG

BANKSELHW_TIME

MOVLWHW_TIMECT3

MOVWFHW_TIME

MOVLWHW_TIMECT0

MOVWFTMR0

BANKSELINTCON

BSFINTCON,T0IE

BSFINTCON,GIE

INT;中断

movwfW_TEMP

movfSTATUS,0

bcfSTATUS,RP0;workinginbank0

movwfSTATUS_TEMP

MOVLWHW_TIMECT0

MOVWFTMR0;重装定时常数

BCFINTCON,T0IF;清除中断溢出标志位(T0IF)

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

DECFSZHW_TIME,1;为零，间跳，定时时间到

GOTOHW_LEAVE1

MOVLWHW_TIMECT1;重装时间常数

MOVWFHW_TIME

BSFHW_Sign,1

HW_LEAVE1

BANKSELSTATUS_TEMP

MOVFSTATUS_TEMP,0

MOVWFSTATUS

MOVFW_TEMP

RETFIE