> Thanks for all of your help! I see now that my mistake was
> interpreting "empty" as meaning "cleared."
>
> Is there any reason to wait to write until TRMT is set as opposed to TXIF=
?

You would normally wait for TXIF. You would only use TRMT if you needed to=
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know that all the data had gone out the wire, perhaps before turning around=
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a line driver or something.

>>RCIF is a read-only bit.  You cannot write a zero to it.  It reflects
>>the state of RCREG: set when there is data waiting to be read, clear
>>when there isn't.
>
> Isn't that unusual for an interrupt flag? Don't interrupt flags
> generally have to be cleared, else the ISR will continually be called?
> Does reading from the RCREG (like "variable =3D RCREG") clear the
> interrupt flag, then?
>
> Thanks,
>
> Nathan

You are exactly right about RCIF, you clear it by reading RCREG. Note that=
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it might remain set if there are additional characters in the receive FIFO.

-- Bob Ammerman
RAm Systems

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