ccp1if problem

Hi,

I am trying to use ccp in compare mode,i tried to set the out high on match,I got the output on timer1 and ccp register match,but i didnt get the cc1pif interrupt.and also it gets increment every instruction...

my code is follows,

list p=16f72 ;PIC16f72 is the target processor
INCLUDE "P16f72.INC"
;------------------------------------------------------------------------------------
__CONFIG _PWRTE_ON & _XT_OSC & _WDT_OFF ; configuration switches

org 0x00
goto main

org 0x04
btfsc PIR1,CCP1IF
goto pwm_loop

main bsf STATUS, RP0 ;Bank1
movlw b'00101111' ;Defining input and output pins
movwf TRISA ;Writing to TRISA register
movlw b'00001111' ;Defining input and output pins
movwf TRISB ;Writing to TRISB register 1-input,0-output
movlw b'00000000'
movwf TRISC
movlw 0x00
movwf ADCON1
bcf STATUS, RP0 ;Bank0
clrf PORTA ;potra,portb initially set to low
clrf PORTB
clrf PORTC
clrf CCP1CON

bsf INTCON,PEIE
clrf PIR1

bsf PIE1,CCP1IE

bsf INTCON,GIE ;Enbles interrupt.
bcf T1CON,TMR1ON
movlw d'8'
movwf CCP1CON
movlw 20
movwf CCPR1L
movlw 30
movwf CCPR1H
clrf TMR1H
clrf TMR1L
bsf T1CON,TMR1ON

wait goto wait //waiting for match
pwm_loop
end


please correct me if any wrong coding...


Regards,
Raja.

Your code is not going to work for a couple of reasons,
PIE1 is in bank 1 - not bank 0.
Your interrupt is going to jump to the end of the code and execute random memory.

If you want to wait for the match then poll the CCP1IF to see when it completes.

Mike.

Thank you very much mr.Mike.

Now my program works fine.

Can i use CCP in compare mode to generate sine pwm?.



-Raja.