On Mon, Dec 14, 1998 at 02:03:55PM -0800, Michael J. Ghormley wrote:
> If I have inadvertatly allowed an INT on PortB or something, at least it has a
> minimal effect.  I have always thought that this is a good idea.

IMHO I think it's not such a good idea. What I would rather do is place
some code at the interrupt vector location that did something noticeable
then hung, e.g. sit in a tight loop toggling an output pin. During development
this would alert you to what has happened. In the field, with the watchdog
timer on, this would lead to a watchdog reset.

Basically the philosophy is that there is no such thing as a small error
in an embedded system - if anything unexpected happens you either want
to know about it RIGHT NOW! or recover in a conservative manner. Trying
to ignore the problem and hope it's not symptomatic of something more
serious will lead to subtly incorrect behaviour that is hard to track
down. Fail-safe is not the same as fail-silently.

Regards, Clyde

--
Clyde Smith-Stubbs               |            HI-TECH Software
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HI-TECH C: compiling the real world.