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Touchscreen Calibration (DIVELK)

901 bytes added, 12:01, 8 March 2019
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{{InfoBoxTop}}
{{Applies To Diva}}
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== History ==
!Version
!Date
!Divelk DIVELK version!Hardware Part Nr
!Notes
|-
|4.0.0
|April 2018<br/><hr/> March 2019|[[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 4.0.01]]
|
|-
== Calibration ==
To === Weston ===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, please do the following:.
<pre>
rm -f /etc/udev/rules.d/ws-calibrate.rules
reboot
</pre>
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 that the of root filesystem is mounted via over NFS and that an additional sdcard is SD card plugged in, make sure delete also the calibration rules stored in the sdcard SD card partition before rebooting.: 
<pre>
rm /etc/udev/rules.d/ws-calibrate.rules
reboot
</pre>
=== Non-Weston based Graphic System ===If the weston compositor is not running, it is necessary to run:<pre> export TSLIB_CALIBFILE=/usr/share/pointercal ts_calibrate</pre>  ==== Exporting TSLIB_CALIBFILE ====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 at int the following [http://processors.wiki.ti.com/index.php/How_to_Recalibrate_the_Touchscreen#Where_is_the_ws-calibrate.rules_file.3F linkpage in TI wiki]
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