> =

> =

> Ruben J=F6nsson wrote:
> > Hi,
> > =

> > I am using a PIC18F2525 with MPLAB 8.30 and ICD3 and I am trying to
> > debug code using Timer1.
> > =

> > I use an ceramic resonator at 20MHz and have set OSC=3DHS. Timer1 is
> > configured to run in timer mode with FOSC/4 as clock. However, when I
> > single step with timer1 on, the timer seems to be free running even when
> > the debugger is halting the PIC. This continuously fires the timer1
> > overflow interrupt and I get into the ISR when stepping over/into next
> > instructions.
> > =

> > The timer works as expected when I try the code with the simulator.
> > =

> > So, when the debugger (ICD3) is halting the processor - should timer1
> > continue counting?
> > =

> > Actually, looking at Timer0 it has the same behavior - still counting
> > when the processor is halted.
> > =

> > Is it not possible to debug with ICD3 using a ceramic resonator as clock
> >  source?
> =

> I do not know about the timer in debug, but it would surprice me
> a lot if it doesn't work the same with a normal quarts crystal...
> =

> Jan-Erik.
> =


So it means that you can't use an external clock source to debug peripheral=
s =

that uses FOSC as clock with ICD3? =


I just did a quick test and actually get the same behavior when using the =

internal oscillator.

If I can't get the clock to the timers to stop when the pic is halted it se=
ems =

like single stepping through code with the debugger is quite useless since =
I =

just end up in the isr servicing timer interrupts! I must be missing someth=
ing =

here...

/Ruben
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D
Ruben J=F6nsson
AB Liros Electronic
Box 9124, 200 39 Malm=F6, Sweden
TEL INT +46 40142078
FAX INT +46 40947388
ruben@pp.sbbs.se
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D

-- =

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