On Jan 29, 2009, at 7:59 AM, Joe P. Farr wrote:

> I'm not using assembler for this, and the read will
> slow things down, and it's a waste of CPU time if I don't want the  
> data,
> hence hoping for something like a quick bit set.

You should be able to read the data directly from the uart register just
as fast as "a quick bit set."  You don't have to go through the higher
level "read character from uart" functions that might exist.
(Of course, if you have an interrupt-driven uart driver "in-play", then
there are all sorts of other complications as well.)

BillW

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