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Hello world example not displaying anything on LCD

  • I have colibri evaluation board 3.1a with Tegra 2 on it. I have compiled QT library and copied to board. I was trying simple hello world button app. Program runs fine(confirmed by inserting prints), but i dont get anything on the LCD display.

    This is the simple code i am trying

    QApplication a( argc, argv );

    QPushButton hello( "Hello world!", 0 );
    hello.resize( 100, 30 );

    a.setMainWidget( &hello );;
    return a.exec();

    PS: I am running Linux on the board.

  • Lifetime Qt Champion

    Hi and welcome to devnet,

    That's a bit low on information. What version of Qt ? What distribution are you running ? Using a window manager ? etc.

  • @SGaist Thanks for reply. I am new to qt. I am using qt-everywhere-opensource-src-4.8.4. I have compiled libraries and app for my board through command line.
    I have used this option to configure qt
    ./configure -embedded arm -xplatform qws/linux-arm-g++ -prefix /usr/local/QtEmbedded -little-endian -v
    Then copied libraries to the board at same location as mentioned in prefix.

  • Lifetime Qt Champion

    You should consider 4.8.6 or even the git version since they are more recent.

    Then the Toradex knowledge base might also contain useful information

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