SBC Lynx SBC/Getting started with Qt Creator

From DAVE Developer's Wiki
Jump to: navigation, search
Info Box


This application note has been validated using the kit version in the History table.

History[edit | edit source]

Version Date Development Kit version
1.0.0 Jun 2021 DESK-MX6UL-L 1.0.1

Introduction[edit | edit source]

This application note details QT Creator setup and configuration in DESK MVM

Setting up Qt Creator to build for DESK[edit | edit source]


Note: The NXP BSP 4.14.98 includes Qt 5.10.1 so the following instructions has been created using Qt Creator 4.5.1 included in the qt-opensource installer for this Qt version.

Qt Creator Installation[edit | edit source]


The qt-opensource-linux installer can be downloaded form the Qt download http site, i.e. from this link.

dvdk@vagrant:~/desk-mx-l$ wget

To install Qt Creator inside your toolchain launch a terminal emulator and run

dvdk@vagrant:~$ cd desk-mx-l/
dvdk@vagrant:~/desk-mx-l$ ./ 

An installation wizard will appear. Clik Next to proced with the installation.

Qt5.10.1 login.png

Fill the form with your information and properly activate your account on Qt web site.

Qt5.10.1 create account.png

Select Next.

Qt5.10.1 setup.png

Select the install directory or click Next.

Qt5.10.1 install directory.png

Select Next.

Qt5.10.1 install components.png

After carefully reading the License Agreement, if you agree, accept it and then press Next again.

Qt5.10.1 install license agreement.png

And then click Install and complete the installation.

Qt5.10.1 installation.png

Then Finish to exit the setup wizard.

Qt5.10.1 finish.png

Manual configuration[edit | edit source]

In this section we details all the step required for configuring the SDK toolchain.

Devices[edit | edit source]

Go to Tools -> Options menu

QtCreator tools options.png

Select Devices and click Add

QtCreator devices.png

Choose the Generic Linux device

QtCreator generic linux device.png

Insert the IP address of your device, root as username and leave password empty (this is the default configuration of DESK root file systems). Make sure that the device is connected to the network and your virtual machine networking is correctly configured (see this article for more details).

Then click Next.

QtCreator device connection.png

If everything went ok pressing Finish button you should see a dialog like the image below.

QtCreator device connected.png

And finally this is how the Devices window should look like.

QtCreator device configuration.png

GCC & Cross Compilation[edit | edit source]

Next you need to configure the cross compilation tool inside Build & Run -> Compiler.

QtCreator build and run compiler.png

Click Add -> GCC, add the compiler path and set (for example) the DESK-MX-GCC compiler name.


And click Apply.

QtCreator build run compiler GCC.png

Do the same for the C++ cross compilation tool (DESK-MX-GCC+)

QtCreator build run compiler GCC+.png

Debugger GDB[edit | edit source]

Now it is necessary to add a debugger. In order to do this go to the Debuggers tab and click Add.

And then select the GDB debugger at the location


and click Apply.

QtCreator build run debugger GDB.png

Qt Version[edit | edit source]

Next you need to add the Qt Version installed on your device. Go to Qt Version click Add and select the following qmake file.

QtCreator qtversions qmake.png

Kits[edit | edit source]

The last step is to add a new kit. Go to Kits and click Add and complete the information as shown below.

QtCreator qtversions kit.png

Pay attention that in Qt mkspec you need to write


After this your setup is complete and you can proceed and create your Qt applications.

Qt application example[edit | edit source]

Now that the setup is finished, you can create your first application

Open a new terminal and source the environment variables with the command.

dvdk@vagrant:~/desk-mx-l$ source 

In the same terminal type the following command (we assume you didn't change the default installation directory)

dvdk@vagrant:~/desk-mx-l$ /home/dvdk/Qt5.10.1/Tools/QtCreator/bin/qtcreator


It is important to repeat the previous two step every time you start QTCreator

Now click on New Project, select Application Qt Widgets Application and click Choose...

QtCreator new project.png

Now call the Project Test and press Next.

QtCreator qtwidgets test.png

Select the DESK Kit and click Next.

QtCreator qtwidgets DESK.png

Choose the class name for your application.

QtCreator qtwidgets class.png

Click Finish to conclude the setup.

QtCreator qtwidgets finish.png

To add a clickable button to your application, select the Edit window and select Test -> Forms -> mainwindow.ui

QtCreator XELK 3 0 0 17.png

Click on Push Button in the Buttons tab and drag it to the main window view. In order to edit the text displayed by the label, double click it and write "Hello World!".

QtCreator XELK 3 0 0 18.png

After that, you need to insert the following two line inside the file

target.path = /tmp/Test # path on device
INSTALLS += target

Where /temp/Test is the path in which your application will be downloaded inside the device.

QtCreator XELK 3 0 0 19.png

The last step before running the application inside the device is to configure Qt backend into application command line arguments: open the Project window and select the Run configuration, then type -platform linuxfb into Arguments

QtCreator platform linuxfb.png

After these changes you are ready to debug your application inside your board with the Run/Debug command QtCreator XELK 3 0 0 35.png

QtCreator XELK 3 0 0 21.png