[ale] TouchScreen???

[John M. Mills]

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);'
>