Revision as of 17:42, 13 February 2019 by Registered User
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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 performed on a running board.
- Edit and change the value of the touchscreen_calibrator in the libinput section ot the weston.ini Weston configuration file[1]
vi /etc/xdg/weston/weston.ini [...] [libinput] touchscreen_calibrator=true calibration_helper=/bin/echo [...]
- Restart weston
systemctl restart weston
- List all the touchscreen devices
weston-touch-calibrator
root@stm32mp1:~# 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
weston-touch-calibrator /sys/devices/platform/soc/40012000.i2c/i2c-0/0-002a/input/input1/event1
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.