From mboxrd@z Thu Jan  1 00:00:00 1970
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From: Delafrance Mirtyle <delafranc.mirtyle@lmco.com>
Subject: writing to and reading from a device file
Date: 1997/12/11
Message-ID: <34900FDB.46FF@lmco.com>#1/1
X-Deja-AN: 297271908
Organization: Lockheed Martin -- Information Systems Center
Newsgroups: comp.lang.ada
Date: 1997-12-11T00:00:00+00:00
List-Id: <comp.lang.ada>


Can anyone tell me how to read and write to a device file such
/dev/tty0p0 for example?  This device is a touch panel.  I am able to
write to it by simply opening the file and writing to it but I cannot
seem to read from it.  The file seems to always be an empty file even
after I've written to it. 
I am communicating with the touch panel through a standard RS-232 cable
on an HP workstation.