Hi,

I have a problem simulating the 17C42A processor with MPLAB.

The symptoms are as follows:

I am unable to get timer1, timer2 or timer3 to function correctly.
I have Timer0 working fine and was able to generate interrupts from
it.

I am unable to see tmr1, tmr2 or tmr3l or tmr3h increment in the
simulator either during animate mode, or by halting the simulation.
I also tried generating interrupts off these timers and was unable to
generate interrupts.

While I am fairly new to the PIC family I have had experience with
other micro-controllers and emulators.  Any help either in
pointing out a stupid mistake or confirming a bug in the
simulator would be appreciated.


Here is the test fragment of code I have been using:


        processor 17C42a

#include "p17c42a.inc"

        org 0
        ; Here at power on reset.
        Goto Reset

        org 8h
        ; Here for external interrupt on RA0
        Retfie

        org 10h
        ; Here for TMR0 overflow interrupt
        Retfie

        org 18h
        ; Here for external interrupt on T0CKI
        Retfie

        org 20h
        ; Here for peripherals PEIF
        Nop
        Retfie


Reset   ;Here at power on reset.

; Test code starts here

        Movlb   2
        Movlw   h'80'
        Movwf   PR1
        Movwf   PR2
        Movwf   PR3L
        Movwf   PR3H
        Movlb   3

        ;Setup timer 1, 2, 3 to increment from internal clock.
        Movlw   b'00000000'
        Movwf   TCON1

        ;Set timer 1, 2 and 3 run flags.
        Movlw   b'00000111'
        Movwf   TCON2

Main    Nop
        Goto Main

        end

I would expect by running this program using the animate mode or
halting simulation I would be able to see the timers clocking.  This
is certainly the behaviour I have with timer0.


Thank you,
Callum.
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Callum Jamieson
ADInstruments
P.O Box 6320, Dunedin, New Zealand
Ph     (03) 477 4646
Fax    (03) 477 4346
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