Changes

Jump to: navigation, search

Touchscreen Calibration (XELK)

1,844 bytes added, 15:29, 15 July 2019
Created page with "{{InfoBoxTop}} {{AppliesToAxel}} {{AppliesToAxelLite}} {{AppliesToAxelEsatta}} {{AppliesToSBCX}} {{InfoBoxBottom}} == History == {| class="wikitable" border="1" !Version !D..."
{{InfoBoxTop}}
{{AppliesToAxel}}
{{AppliesToAxelLite}}
{{AppliesToAxelEsatta}}
{{AppliesToSBCX}}
{{InfoBoxBottom}}


== History ==

{| class="wikitable" border="1"
!Version
!Date
!DIVELK version
!Notes
|-
|4.0.0
|July 2019
|[[Axel_Embedded_Linux_Kit_(XELK)#XELK_4.0.0|XELK 4.0.0]]
|
|-
|}

== Calibration ==
=== 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.
<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 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:

<pre>
rm /etc/udev/rules.d/ws-calibrate.rules
rm /run/media/mmcblk0p1/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 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]
dave_user
22
edits

Navigation menu