eGalax touchscreen calibration

[Markamc]

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