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From: FERGUSON@BKNLVMS.BITNET
Newsgroups: comp.sys.apollo
Subject: Summagraphics Bitpads
Message-ID: <8706251918.AA06983@yale-eli.arpa>
Date: Wed, 24-Jun-87 11:00:00 EDT
Article-I.D.: yale-eli.8706251918.AA06983
Posted: Wed Jun 24 11:00:00 1987
Date-Received: Sat, 27-Jun-87 04:26:13 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The ARPA Internet
Lines: 17

I am writing a Summagraphics digitizer interface for digitizing and area
measurement, and I'm having a small interface problem.

I would like to reset the tablet and re-configure it at run-time, because
Undergraduate engineering students don't like things like TCTL.

If you send a Summagraphics bitpad the HEX 00 character to reset it, it sends
a whole lot of garbage back.  Then, it doesn't allow you to talk sense to it.
I've tried time_$wait ing for the garbage to go away, and stream_$get_rec
until status becomes zero to flush the input buffer. I've also tried
closing the stream to the sio line and re-opening it, but this stuff won't
go away.   Does anyone know how to simply flush the input buffer an/or
reset a data tablet without throwing it out a window?

                Thanks, Scott Ferguson

                ferguson@bknlvms.bitnet