On Thu, 26 May 2011 03:20:39 -0600, you wrote:

>It's product development season again, and one of my key product lines=20
>has a multidrop ttl-level serial bus between it's main unit and the=20
>modules.  This works remarkably well until it's time to troubleshoot=20
>communication issues.
>
>The problem is that it does 9 bit serial, and it is almost impossible to=20
>find anything which does 9 bit serial protocol analysis, and does it in=20
>real time (as opposed to a typical pc logic analyzer which captures then=20
>analyzes), and is relatively inexpensive.
>
>Is anyone aware of a uart-like interface/analyzer which will monitor 9=20
>bit serial data - relatively inexpensive, and preferably does ttl-level=20
>(although I can definitely 'upconvert' to rs-232 levels really easily)?
>
>Oh, standard baud rates, up to at least 115.2, although higher would be=20
>nice...
>
>-forrest

Maybe the easiest solution is to knock up a pic or whatever  to read the 9-=
bit data and spit out as
2x 8-bit at twice the baudrate, so you can use with a standard serial analy=
zer

--=20
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