Olin Lathrop wrote:
>
> >   Its's not enough. Will work only first time after a reset. I've tested.
> > Next time when will come a character with other baud rate, the receiver
> > it's still stick on the old baudrate and a frame error will occur. Before
> > setting a new value for SPBRG and BRGH, a reset must be produced and new
> > values could be written in those register.
>
> I know you say you've tested this, but I still find this very hard to
> believe.  Did you try completely disabling the UART, changing the baud rate,
> then enabling the UART again?  I have a feeling something else was going on
> in your test that made it appear as if the processor had to be reset to
> change baud rate.
>
> I don't have time to test this now myself, but this is just too bizarre for
> me to believe without seeing it myself where I can carefully control the
> conditions to my own satisfaction.


I've got an idea I got caught with this also.

It was a while ago, but from memory I had to transmit a dummy byte to
"flush" the UART and then it would work ok.


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Best regards

Tony

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