Why Isn't the Touch Screen Working on My Qt Application Deployed to BeagleBone Black?

@Middleware & OS
Hello guys I configured a Qt development environment to develop applications for ARM based Embedded Linux platform, I am using a Ubuntu 12.04 (64bit) host system and beaglebone black ARM hardware platform. I have created a simple hello world program with a button which I have deployed to the Embedded Linux device (BBB) but the touch screen is not working. Below is the code.

#include <QApplication>
#include <QPushButton>

int main(int argc, char** argv) {
    QApplication app(argc, argv);

    QPushButton btn("Hello World");
    btn.show();
    btn.showMaximized();

    return app.exec();
}

#include <QApplication>
#include <QPushButton>

int main(int argc, char** argv) {
    QApplication app(argc, argv);

    QPushButton btn("Hello World");
    btn.show();
    btn.showMaximized();

    return app.exec();
}

#include <QApplication>
#include <QPushButton>

int main(int argc, char** argv) {
    QApplication app(argc, argv);

    QPushButton btn("Hello World");
    btn.show();
    btn.showMaximized();

    return app.exec();
}

#include <QApplication>
#include <QPushButton>

int main(int argc, char** argv) {
    QApplication app(argc, argv);

    QPushButton btn("Hello World");
    btn.show();
    btn.showMaximized();

    return app.exec();
}

what might be wrong?

Solution

@Boss lady The touch screen not working on your BeagleBone Black (BBB) could be due to several reasons. you can try troubleshooting by
making sure the touchscreen drivers are properly installed on the BBB. You can check this by running:

     dmesg | grep touch

     dmesg | grep touch

     dmesg | grep touch

     dmesg | grep touch

if the drivers are not installed, you'll need to find and install the appropriate drivers for your touchscreen, Sometimes the touchscreen needs calibration. You can use tools like

ts_calibrate

ts_calibrate

ts_calibrate

ts_calibrate to calibrate the touchscreen, make sure your Qt environment is configured to support touch events. You might need to set the appropriate Qt plugins for input devices. like

     export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/eventX
     export QT_QPA_GENERIC_PLUGINS=evdevtouch:/dev/input/eventX

     export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/eventX
     export QT_QPA_GENERIC_PLUGINS=evdevtouch:/dev/input/eventX

     export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/eventX
     export QT_QPA_GENERIC_PLUGINS=evdevtouch:/dev/input/eventX

     export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/eventX
     export QT_QPA_GENERIC_PLUGINS=evdevtouch:/dev/input/eventX

Replace

/dev/input/eventX

/dev/input/eventX

/dev/input/eventX

/dev/input/eventX with the correct event device for your touchscreen.
ensure that the application has the necessary permissions to access the input device. You might need to adjust the permissions:

     sudo chmod 666 /dev/input/eventX

     sudo chmod 666 /dev/input/eventX

     sudo chmod 666 /dev/input/eventX

     sudo chmod 666 /dev/input/eventX

then for the final stage update your libraries

Jump to solution

Why Isn't the Touch Screen Working on My Qt Application Deployed to BeagleBone Black?

Similar Threads

Similar Threads

Similar Threads