> I am trying to write a byte from the PIC to the PC on the USART. But
> when I write a byte to TXREG the byte received at the PC is always
> incorrect, and sometimes the PC reads two bytes. I am using a MAX232 to
> do the level conversion and I am confident that the USART is set up
> correctly. What are some possible causes for this?

It sounds like a buad rate mismatch, but there could be other causes.

Write a little test program on the PIC to send the same byte repeatedly
with a little delay between bytes.  That will allow you to check the
signal on the scope to decide which side (the PIC or PC) is having the
problem.


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