i.MX51 Ubuntu USB TS

Document created by jesseg Employee on Aug 22, 2012Last modified by Jodi Paul on May 16, 2013
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Using a USB Touchscreen on Ubuntu

 

 

  This example uses a XENARC 706TSA monitor http://www.xenarc.com/product/706tsa.html

 

 

To use a USB touchscreen on i.MX51 EVK, disable all touchscreen drivers on menuconfig and build the kernel:

Device Drivers  ---> 
       Input device support  ---> 
       [ ]   Touchscreens  --->

Ts_usb_menuconfig.jpg


Download xserver-xorg-input-evtouch (0.8.8-ubuntu3 version) from http://launchpadlibrarian.net/24760784/xserver-xorg-input-evtouch_0.8.8-0ubuntu3_armel.deb.

 

X crash is found if using latest 0.8.8-ubuntu6.1 version. For the details. See https://bugs.launchpad.net/ubuntu/+source/xf86-inputevtouch/+bug/511491

On MX51 EVK board, run “sudo dpkg –i xserver-xorg-input-evtouch_0.8.8-0ubuntu3_armel.deb” to install debian package.

 

Add fdi file by "sudo vi ./usr/share/hal/fdi/policy/20thirdparty/50-eGalax.fdi":

<?xml version="1.0" encoding="UTF-8"?> 
<deviceinfo version="0.2"> 
   <device> 
      <match key="info.product" contains="eGalax"> 
         <match key="info.capabilities" contains="input"> 
            <merge key="input.x11_driver" type="string">evtouch</merge> 
            <merge key="input.x11_options.minx" type="string">130</merge> 
            <merge key="input.x11_options.miny" type="string">197</merge> 
            <merge key="input.x11_options.maxx" type="string">3945</merge> 
            <merge key="input.x11_options.maxy" type="string">3894</merge> 
            <merge key="input.x11_options.Rotate" type="string">CCW</merge> 
            <merge key="input.x11_options.Swapy" type="string">true</merge> 
            <merge key="input.x11_options.taptimer" type="string">30</merge> 
            <merge key="input.x11_options.longtouchtimer" type="string">750</merge> 
            <merge key="input.x11_options.longtouched_action" type="string">click</merge> 
            <merge key="input.x11_options.longtouched_button" type="string">3</merge> 
            <merge key="input.x11_options.oneandhalftap_button" type="string">2</merge> 
            <merge key="input.x11_options.movelimit" type="string">10</merge> 
            <merge key="input.x11_options.touched_drag" type="string">1</merge> 
            <merge key="input.x11_options.maybetapped_action" type="string">click</merge> 
            <merge key="input.x11_options.maybetapped_button" type="string">1</merge> 
         </match> 
      </match> 
   </device> 
</deviceinfo>

Save above configuration.

 

Calibrating

 

Calibration in made by clicking on System -> Administration -> Calibrate Touchscreen

Follow the on screen instructions and reboot the system.

 

Calibrating using Xinput Calibrator

 

Xinput_calibrator is another option to calibrate touchscreen. It can be downloaded at: http://www.freedesktop.org/wiki/Software/xinput_calibrator

On i.MX5x Ubuntu, unpack the source code:

tar -xzvf xinput_calibrator-0.7.5.tar.gz 

Install xorg-dev, it's required to build xinput_calibrator

sudo apt-get install xorg-dev 

Configure, build and install xinput_calibrator

./configure 
./make 
./make install

Execute xinput_calibrator. A four-point calibration screen will be shown. Follow the instructions on screen and after complete xinput_calibrator will return the calibration parameters.

 

Replace the given calibration parameters on file /usr/share/hal/fdi/policy/20thirdparty/50-eGalax.fdi and reboot the system.


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