[ale] TouchScreen???
John M. Mills
jmills at jmills.gtri.gatech.edu
Mon Nov 30 17:51:51 EST 1998
Gentle NtW--
We (GTRI/SDL) used an Emerald "embedded PC" with a touch screen. The
driver was simple so far as user code was concerned: touching the screen
returned a message stuffed into console input, corresponding to the point
coordinates. The app got a text command at stdin, in other words.
Emerald had tools to map the screen (quite non-linear in raw state), and
to associate text messages with [corrected] X-Y coordinates.
We ran Win3.1 and wrote the app in Borland C. Default boot was a 3.5"
diskette, but that was normally _not_ in place; the secondary and usual
boot was an IDE-interfaced "flash card" of a few megs. (Pop in a diskette
when you wanted to load an upgrade, for example.)
You might find out whether Emerald would release source (presumably under
a NDA as part of an order), or consider a Linux port of their utilities,
presuming you buy their screen. The screen at that time ('95?) came with
either a mono-ega interface or part of the embedded PC which we bought.
It was an OEM part which you could buy, but needed significant support
logic. I could probably retreive the maker of the screen (ELO??) if you
needed it.
John M. Mills, Senior Research Engineer -- john.mills at gtri.gatech.edu
Georgia Tech Research Institute, Georgia Tech, Atlanta, GA 30332-0834
Phone contacts: 404.894.0151 (voice), 404.894.6285 (FAX)
"Give someone a fish and they can eat for a day. Teach them to use the
InterNet and they won't bother you for weeks." - from posted news item
On Mon, 30 Nov 1998, Nomad the Wanderer wrote:
> Does anyone have any knowledge about touch screens under linux? I'm
> working on a buisness proposal to use them but that'll be a turning point.
>
> In particular, I have a programmer who's going to write me some menuing
> software and it'll be implemented with a touch screen, but he's hoping
> I can find an "API" for it. Anyone have any ideas?
>
> Robert
>
>
> ---------------------------------------------------------------------------
> Robert L. Harris | Windows --
> Senior System Administrator II | Proof Micro$oft has
> at Great West Life. \_ a room full of monkeys.
>
> http://www.orci.com/~nomad
>
> DISCLAIMER:
> These are MY OPINIONS ALONE. I speak for no-one else.
>
> FYI:
> perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'
>
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