Re: [avr-chat] Re: mega644 resetting continuously

[Steve Franks]

On 1/29/07, Eric Weddington <address@hidden> wrote:
> > -----Original Message-----
> > From: address@hidden
> > [mailto:address@hidden
> >  On Behalf Of Steve Franks
> > Sent: Monday, January 29, 2007 9:15 AM
> > To: Daine Mamacos
> > Cc: address@hidden
> > Subject: [avr-chat] Re: mega644 resetting continuously
>
> > I don't have the problem at all on the new 4.1.1 compiler, probably
> > just because it optimizes better - but if you're on windows, you'll
> > have to wait until the next winavr release.
> >
>
> Which has been released, btw.
>
> Eric

Oh, sorry.  4.1.1 is out.  And boy, does it optimize - same stuff was
135k on 3.4.5, now is 120k.  Yes, not a typo.  I'm in charge of a
leviathan.

But back to the watchdog.  I think the key(s) are the MCUCSR = 0 and
wdt_reset() before wdt_disable() on the newer devices.  I don't know
if the Mega8 is "new" or "old" in terms of wdt, but you might
double-check.

The __attribute__ init3 inserts the wdt disabling code in your
startup, so no, you don't have to call it explicitly (as long as you
have no typos in there - I don't know if an invalid attribute will
cause a warning or not, I suspect not).  You can always see if it's in
the listing.

Steve

--
Steve Franks, KE7BTE
Staff Engineer
La Palma Devices, LLC
http://www.lapalmadevices.com
(520) 312-0089