>> The TRMT flag tells you that the whole byte has
>> actually been sent on the wire.
>
>No, it does not.  It tells you that the transmit
>shift register is empty.  It does not mean the UART
>has finished transmitting it on the wire.

Interesting.  If this is true, then none of the
examples posted are correct uses of checking TRMT=1:

- Changing the uart bit rate dynamically
- Turning off an RS-485 transmit driver
- Completing transmission before power down

Granted, relying on TRMT in this way only opens a
teeny-tiny window, but a window is a window, no?

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