Re: PIC USART troubles

You didn't say that before. I figured you used a standard cable. Tidbits
like this are extremely important.

Apologies, ive taken the MAX232 out of the equation now.

Try connecting the PIC to the pc using the special cable and see if it's
working. Do you have a scope to verify the baud rate is correct.?

The phone can speak to the PC via hyper-terminal, with the settings
Baud 9600, 8 bits ,1 stop , parity none. i dont have a scope to hand
till Monday morning so impossible to tell, but on friday when i was in
the lab all seemed well. But since then i have made a few changes to
the code but nothing i think would affect the running, but then again
who knows.

Sounds like your phone may be 3.3V compatible. If so, it may not much like
you slapping it with 5V signals from the PIC. Try powering the PIC from 3V
and see what happens. Make sure brown out detect (BODEN) is not enabled.

Been running the PIC at 3.3V with brown out off.

with ref to the errors these would only affect the RX, yes? At the
moment i am trying to send an AT command that will switch off the
phone this would give me a definite confirmation that the phone
received the command. Would these FERR and OERR errors affect the TX
line?

Thanks

Wayne


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