Qt and framebuffer

This tutorial aims to show how to compile the buildroot and kernel to boot a Qt Application. It also explains how to compile your Qt application for ARM and how to run it boot. You need to have :

- Qtcreator (https://qt-project.org/)
- Toolchain (https://www.electronsonradio.com/2011/04/intro-to-basic-cross-
compiling-for-the-beagleboard/)
- Buildroot (https://blog.galemin.com/2011/06/buildroot-2011-05-all-in-one-for-
beagleboard-xm/)
- Kernel (https://kernel.org/)
- Beagelboard (https://beagleboard.org/)
- SD card

    1\ Kernel :

In compiling your kernel it is important to configure the frame buffer before. To do this go to "Device Drivers=>Graphics suppor". After export:

The ideal is to select the minimum config for the rest.

    2\ Build root :

In compiling your build root it is important to configure the frame buffer before and "Qt=> graphics drivers=> select linux framebuffer". After export:

Select mouse driver, freetype2 et png support if you want use mouse, picture, ...

    3\ QT:

Configuring Qt toolchain for ARM Cortex A8 (tool => option => add), Qt version and Qt project.

Qt code:

main.cpp. you can download the code here :

#include "mainwindow.h"
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.showFullScreen(); 
    return a.exec();
}

Copy MLO, u-boot , kernel, buildroot and Qt applcation on your SD card. Start the Qt application in the framebuffer from buildroot.