Difference between revisions of "How to calibrate the touchscreen"

[unchecked revision] [quality revision]
 




Touchscreen is more precise after a calibration, but this action is not mandatory.

Calibration data are erased after each firmware download into STMicroelectronics boards.

The steps described below have to be performed on a running board :

  • Edit and change the value of the touchscreen_calibrator to true in the libinput section of the weston.ini Weston configuration file[1]. #[libinput shall be uncommented.
 
Board $> vi /etc/xdg/weston/weston.ini
 [...]
 [libinput]
 touchscreen_calibrator=true
 calibration_helper=/bin/echo
 [...]
  • Restart weston
 
Board $> systemctl restart weston
  • List all the touchscreen devices
 
Board $> weston-touch-calibrator
could not load cursor 'dnd-move'
could not load cursor 'dnd-copy'
could not load cursor 'dnd-none'
device "/sys/devices/platform/soc/40012000.i2c/i2c-0/0-002a/input/input1/event1" - head "DSI-1"

  • Launch calibration with the input of the touch panel
 
Board $> weston-touch-calibrator /sys/devices/platform/soc/40012000.i2c/i2c-0/0-002a/input/input1/event1

If the calibration succeeds, no message will be displayed on the console. If it fails, the following message will appear:

 
Board $> weston-touch-calibrator error: Calibration verification failed, too large error.

Touchscreen identifier may vary, depending on the devices that are connected to the board. Recommendation is to unplug all the additional input devices before booting. Otherwise, it is up to You to adapt the command line.

References[edit]

<noinclude>

{{ArticleMainWriter | DenisH}}
{{ArticleProposedVersion | DenisH | YannickF(Not Done), Jean-ChristopheT(Failed, 28Jan'19), NathalieS(Passed, 15feb'18)| No previous approved version | Nobody | 15Feb'19 }}
{{ ArticleToBeReviewedByTW | <TLMS PR number> | 15Feb'19 }}
[[Category:How to run use cases]]
[[Category:Wayland Weston]]</noinclude>

{{ReviewsComments|NSA : W907.5 : to assign as reviewer (Experts) this page to YannickF as soon as he will have an account}}

Touchscreen is more precise after a calibration, but this action is not mandatory.

Calibration data are erased after each firmware download into STMicroelectronics boards.

The steps described below have to be performed on a running board :
{{ReviewsComments|JCT w905: it would have been nice to have these lines already, per default, in weston.ini. Maybe, a future improvement?}}
* Edit and change the value of the ''touchscreen_calibrator'' to '''true''' in the ''libinput'' section of the ''weston.ini'' Weston configuration file<ref name="weston.ini">[http://manpages.ubuntu.com/manpages/wily/man5/weston.ini.5.html Ubuntu weston.ini manpage]</ref>. ''#[libinput'' shall be uncommented.

  {{Board$}} vi /etc/xdg/weston/weston.ini
  [...]
  [libinput]
  touchscreen_calibrator=true
  calibration_helper=/bin/echo
  [...]

* Restart weston

  {{Board$}} systemctl restart weston

* List all the touchscreen devices
  {{Board$}} weston-touch-calibrator
 could not load cursor 'dnd-move'
 could not load cursor 'dnd-copy'
 could not load cursor 'dnd-none'
 device "/sys/devices/platform/soc/40012000.i2c/i2c-0/0-002a/input/input1/event1" - head "DSI-1"

* Launch calibration with the input of the touch panel

  {{Board$}} weston-touch-calibrator /sys/devices/platform/soc/40012000.i2c/i2c-0/0-002a/input/input1/event1

If the calibration succeeds, no message will be displayed on the console. If it fails, the following message will appear:
  {{Board$}} weston-touch-calibrator error: Calibration verification failed, too large error.

Touchscreen identifier may vary, depending on the devices that are connected to the board. Recommendation is to unplug all the additional input devices before booting. Otherwise, it is up to You to adapt the command line.

==References==<references />
Line 2: Line 2:
 
{{ArticleMainWriter | DenisH}}
 
{{ArticleMainWriter | DenisH}}
 
{{ArticleProposedVersion | DenisH | YannickF(Not Done), Jean-ChristopheT(Failed, 28Jan'19), NathalieS(Passed, 15feb'18)| No previous approved version | Nobody | 15Feb'19 }}
 
{{ArticleProposedVersion | DenisH | YannickF(Not Done), Jean-ChristopheT(Failed, 28Jan'19), NathalieS(Passed, 15feb'18)| No previous approved version | Nobody | 15Feb'19 }}
{{ ArticleToBeReviewedByTW | <TLMS PR number> | 15Feb'19 }}
+
{{ArticleToBeReviewedByTW | <TLMS PR number> | 15Feb'19 }}
 
[[Category:How to run use cases]]
 
[[Category:How to run use cases]]
 
[[Category:Wayland Weston]]
 
[[Category:Wayland Weston]]

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