Difference between revisions of "Touchscreen Calibration (DIVELK)"

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!Notes
 
!Notes
 
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|4.0.0
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|1.0.0
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|April 2018 <br/><hr/> March 2019
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|April 2018
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|[[Diva_Embedded_Linux_Kit_(DIVELK)#DIVELK_4.0.0|DIVELK 4.0.0]] <br/><hr/> [[Diva_Embedded_Linux_Kit_(DIVELK)#DIVELK_4.0.1|DIVELK 4.0.1]]
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|[[Diva_Embedded_Linux_Kit_(DIVELK)#DIVELK_4.0.0|DIVELK 4.0.0]]
 
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== Calibration ==
 
== Calibration ==
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=== Weston ===
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To calibrate the touchscreen, please do the following:
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If the Weston compositor is running in the background, it is necessary to remove the old udev rules, and restart the device in order to calibrate the touchscreen.
 
 
<pre>
 
<pre>
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  rm -f /etc/udev/rules.d/ws-calibrate.rules
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  rm /etc/udev/rules.d/ws-calibrate.rules
 
  reboot
 
  reboot
 
</pre>
 
</pre>
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  reboot
 
  reboot
 
</pre>  
 
</pre>  
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=== Non-Weston based Graphic System ===
 
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If the weston compositor is not running, it is necessary to run:
 
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<pre>
 
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  export TSLIB_CALIBFILE=/usr/share/pointercal
 
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  ts_calibrate
 
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</pre>
 
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==== Exporting TSLIB_CALIBFILE ====
 
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The environment variable TSLIB_CALIBFILE is used by the tslib package to indicate the location of the pointercal file. The default value for TSLIB_CALIBFILE is /etc/pointercal. If you are writing a program that uses tslib you should make sure that you export TSLIB_CALIBFILE to point to the location of your pointercal file (as indicated in the previous section), or that you place a copy of the pointercal file at the default /etc/pointercal location.
 
  
 
Additional information can be found int the following [http://processors.wiki.ti.com/index.php/How_to_Recalibrate_the_Touchscreen#Where_is_the_ws-calibrate.rules_file.3F page in TI wiki]
 
Additional information can be found int the following [http://processors.wiki.ti.com/index.php/How_to_Recalibrate_the_Touchscreen#Where_is_the_ws-calibrate.rules_file.3F page in TI wiki]

Revision as of 20:19, 26 April 2018

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Info Box
Diva-am335x-overview.png Applies to Diva


History[edit | edit source]

Version Date DIVELK version Notes
1.0.0 April 2018 DIVELK 4.0.0

Calibration[edit | edit source]

To calibrate the touchscreen, please do the following: 

 rm /etc/udev/rules.d/ws-calibrate.rules
 reboot

At the next restart the weston-calibrator tool should automatically show up. Tap on the red cross appearing on the screen to calibrate the touch panel.

Note: In the case of root filesystem over NFS and SD card plugged in, make sure delete also the calibration rules stored in the SD card partition before rebooting: 

 rm /etc/udev/rules.d/ws-calibrate.rules
 rm /run/media/mmcblk0p1/ws-calibrate.rules
 reboot

Additional information can be found int the following page in TI wiki

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