Touchscreen calibration on linuxfb embedded application



  • Hi all,
    I have a BeagleBone Black board with a BB-View touchscreen display.
    Now I have Qt 5.3 on my board and I can build and run Qt applications this way:
    @
    export QT_QPA_PLATFORM=linuxfb:size=480x272
    ./styleexample -plugin evdevtouch
    @

    The problem is that the touchscreen pointer is not very accurate.
    I know that for Xorg there is xinput_calibrator but it doesn't works for non X systems.

    Is there a way to get TS more accurate in linuxfb mode?

    thanks



  • I actually found a workaround:
    @
    X &
    ./styleexample -platform xcb &
    @

    This way I have a calibrated touchscreen (I calibrated it before with xinput_calibrator).

    But I'd like to have the TS working in linuxfb platform...



  • If this is a resistive, single touch only touchscreen, you could try using the tslib plugin instead of evdevtouch.



  • [quote author="agocs" date="1403705071"]If this is a resistive, single touch only touchscreen, you could try using the tslib plugin instead of evdevtouch.
    [/quote]

    Running apps with tslib plugin the TS doesn't works... I don't know why.


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