On Fri, 8 Mar 2002 20:19:53 +0100, Alvaro Deibe Diaz wrote:

>I know it, but I need my 16MHz crystal to generate "exact" 10ms sample
>periods in my project. If I use a crystal that generate standard RS2
>baud rates, I can't get exact 10ms...
>
>This is the reason for trying to "force" the PC to talk in other baud
>rates. I thought perhaps the 16XXX of the PC UARTs have clock generation
>with more than the 8 bits of SPBRG in the PIC. This way I could get less
>than 2,13% error between both baud rates.
>

Unless there's some other reason to avoid doing so, the 250nS
instruction resolution you have at 16MHz should allow you to bit-bang
your RS-232 at standard baud rates with minimal error.=20

Hardware UARTs are very convenient but sometimes bit-banging can have
its benefits. :-)


Regards, Bob

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