Hello!

This is my first post here so please be kind.. :-D
(now with the correct tag ;) )

I'm working on a 18F452 with MP Lab 6 C compiler and a ICD-U40
programmer.
I'm experiencing a weird problem, I try to explain it as much clear as
I can :-))

My sample program is very simple, it just outputs alphabet letters (A
-> Z and repeat) on a 9600 bps software UART using MPLAB-provided
libraries, in an infinte loop.

It would works correctly but after about 3 seconds of starts the PIC
seems to auto-reset itselfs, and it goes on autoresetting every 3 secs.
(just to be sure, I also toggle a led in main() and it confirms this
autoresets)

Reading RCON register just after main() and on every reset (but before
to setting it to 0x1f for clear) reports 23 decimal as previous startup
cause.
If I'm right it should be WatchDog Timeout.

But I don't understand why... further, I also tried disabling WD in
config-words (_and_ setting WDTCONbits.SWDTEN=0) but nothing changes.
Idem modifying WD prescaler, no-change :(

Someone could, please, enlight me ?
What I miss ? Where am I wrong ?

Many thanks in advance!!


--

bye!

Ale

ale@unixmania.net

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