To calibrate the ComfilePi's touchscreen, simply run the following command from the ComfilePi's desktop.
sudo /opt/ComfileTech/touch/rpi-AR1100/AR1100 -c 4
This will display a sequence of 4 crosshairs that need to be accurately touched to perform the calibration. After the calibration, the mouse device will be re-enumerated, so the touch-beep may no longer sound when the screen is touched. To remedy that, either reboot the ComfilePi, or restart the touch-beep service with the following command:
sudo systemctl restart touch-beep.service
If the touchscreen no longer works after calibrating, please try running the following command to force it to re-enumerate in mouse mode, and then reboot.
sudo /opt/ComfileTech/touch/rpi-AR1100/AR1100 -m
It has been reported to us that to achieve accurate touch events in Kivy the following lines may need to be added to the
[input] section of the /home/pi/.kivy/config.ini file.
mouse = mouse mtdev_%(name)s = probesysfs,provider=mtdev hid_%(name)s = probesysfs,provider=hidinput