> It can however be very limiting. What if you don't have a serial (or
> other) interface for displaying/outputting the printf? 

I build myself one, using an IR diode. optical isolation, and no
connectors needed. and the external circuit is project-independent, can
even be used (with an LCD) when no PC is available.

> That's the real benefit to me of the ICD2/JTAG type debugging: it has
> (ideally) no effect whether you use it or not (of course 
> there are cases
> where the break points can affect a problem). It's a "back door".

as I said, it depends a lot on the type of projects you are doing. jtag
won't help much if your problem is timing-dependant. (printf will also
interfere, but it is more 'under your control').

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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