Lucian wrote:

> In fact, now I put directly the value 25 in SPBRG, which is
> for 9600 baud rate, at 4 MHz (that's what I understood from
> a microchip application note). Is this value correct for my setup ?

Check your value using the *formulas* in the data sheet for your specific
PIC type ! And if you say that you have found the value in an app note,
why not tell us *what* app note (the ANxxx number) so we can check it ?


> The code for the ISR is inspired from an
> example from HT-PIC C Compiler, so I thought it is correct.

You might read the actual assembler code produced to verify that/if
your C code does the "right" thing.

And "inspiration" isn't a process without weak points :-)

Another way to debug is to strip your C code down until all
works. Built a very simple example without all the fancy
buffer handling. This also makes it easier to read the
assembler code produced. *Then* add the other features and
you'll probably see when it breaks.

Have you verified that the led*_on() and led*_off() routines
work as they should ? Why make them into separate routines ?
Isn't it just a simple bsf/bcf (or whatever it's called in C) thing ?


Jan-Erik.
PS.
Your posts are still composed of long lines
that makes it harder then necessarily to reply to...

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