AVR-Chat

On Tue, Mar 22, 2005 at 12:04:47PM -0300, Javier Fiasche wrote:
> 
> i dont seem to sincronice the transmitter and the reciver usart,
> because when the transmitter is off and the reciever is on i keep
> getting and Framming error.

Send more of your sync characters and on the RX side drop the extra.

Ignore framing errors unless they come between your packet header and
packet end.

Asynchronous serial is less than ideal in radio environments. If your
AVR has USARTs then use synchronous mode. Still, you must send enough
extra preamble for the transmitter to stablilze and the receiver to lock
on to the incoming data. With inexpensive voice grade gear this could be
100 mS or more.

Speaking of which, you say nothing of your data rate or modem. Can't
simply pipe serial data into an analog radio's microphone input.

-- 
David Kelly N4HHE, dkelly@HiWAAY.net
========================================================================
Whom computers would destroy, they must first drive mad.