eGalax touchscreen calibration

[brantje]

(25th Apr, 2013 07:32 AM)Markamc Wrote:  Hi Luca,

I have my egalax touch screen (car-pc project) working and calibrated with Xbian. I used the Xbian image, it has the kernel modules necessary for touchscreen support. The only thing I did was follow the guide to re-compile xbmc with the patched files from Andrei included. Follow this guide, it worked for me, then you can add the file: usr/share/eGalaxCalibration/touchscreen_axes_calib, with you data and modify the values to adjust your screen calibration (as Andrei describes)

https://github.com/xbianonpi/xbian/wiki/Compiling-XBMC-&-XBMC-dependencies

The only thing I needed to do was remove some coding (link below) as I have stated on Andrei's blog, so I could achieve a double click; I found I had no click just a constant mousedrag error in xbmc

http://engineering-diy.blogspot.co.uk/2013/02/raspberry-pi-raspbian-xbmc-and-egalax-7.html?showComment=1364419629030#c8991511687109589988

Don' forget to make a swapfile, I needed to, to compile XBMC on 256mb pi

For reference, I needed to play with the offset and scale values in the calib file for my 7" 1280x720 touchscreen,
calib fle parameters are as follows:

calib_x_d=1280;calib_x_fact=-0.625;calib_y_d=760;calib_y_fact=-0.374799606;swap_axes=0;

(i scaled the values t fit within a bezel around the screen)

Hope this helps

mark

Bezel like this one?
http://pbrd.co/1236I7F

@curly

Code:

xbian@xbian ~ $ cat /proc/bus/input/devices
xbian@xbian ~ $ lsusb
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 0eef:0001 D-WAV Scientific Co., Ltd eGalax TouchScreen
xbian@xbian ~ $

Device attached properly but xbian doesn't detect it anymore.

Maybe if we can get this thing working and calibrated, write some program for easy calibration?
Also an xbian touchscreen skin can be an idea.