Hello.

I got a very urgent problem:

I've got a working project and need to add a clock. I already use all the
timers, except timer2. Reading the data sheet says: timer2 increases until it
matches pr2. Then timer2 will reset and (if there is no postscaler) the
TMR2IF in the PIR1 register will be set.
Excellent. But this is exactly what doesn't work.
timer2 increases, resets on match with pr2, but that damned (sorry) TMR2IF is
not set. I am not using a CCP-Module and I do not want to do so. I just want
timer2 (without any other module) to generate an interrupt after a match
occured. Perhaps it's just a little bug and I can't find it (since 2 days),
but I need your help and really do appreciate it.
Thanks in advance!

Here is my test source (setbank is a macro to select file register bank):

        org 0x00
        goto start
        org 0x04
        goto service

start
        setbank 1
        movlw   H'10'
        movwf   PR2
        setbank 0
        clrf    TMR2
        clrf    T2CON
        bsf     T2CON,TMR2ON
        bcf     PIR1,TMR2IF
        setbank 1
        bsf     PIE1,TMR2IE
        setbank 0
        bsf     INTCON,GIE
        bsf     INTCON,PEIE


loop
        nop
        nop
        goto    loop

service
        nop
        nop
        retfie

        end


Hans J. Ziegler