Linux App Qt Creator¶

Objective¶

This wiki page will describe how to setup Qt Creator so it can be used to build and run an ARM Linux user-level program on the AM62 platform.

References¶

General Setup¶

Install and launch Qt Creator: https://download.qt.io/official_releases/qtcreator/latest/
Download and install Ti's processor sdk: TI processor SDK (v10.01.10.04)

Build the Qt6 Toolchain (SDK 11 Only)

pokyuser@3ef90a36cd3a:/work$ bitbake meta-toolchain-qt6

Qt Creator CMake Hello_World example¶

Source the toolchain and launch Qt Creator

SDK 10.01

$ source /<SDK_INSTALL_DIR>/ti-processor-sdk-linux-am62xx-evm-10.01.10.04/linux-devkit/environment-setup
$ /<QT_CREATOR_INSTALL_DIR>/qtcreator-16.0.0/bin/qtcreator

SDK 11

$ source /<QT_TOOLCHAIN_DIR>/environment-setup-aarch64-oe-linux
$ /<QT_CREATOR_INSTALL_DIR>/qtcreator-16.0.0/bin/qtcreator

Create a kit SDK 10.01

Navigate to toolbar: Edit->Preferences
- Select the "Kits" category
  - On the Kits tab hit "Add"
  - Name: "arm64 qt 5 10.1 sdk"
  - Build device: Type: "Desktop"
  - Run device: Type: "Remote Linux Device"
  - Compiler: C/C++: GCC (C, arm 64bit at /<SDK_INSTALL_DIR>/ti-processor-sdk-linux-am62xx-evm-10.01.10.04/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/aarch64-oe-linux/aarch64-oe-linux-gcc)
  - Debugger: System GDB at /<SDK_INSTALL_DIR>/ti-processor-sdk-linux-am62xx-evm-10.01.10.04/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/aarch64-oe-linux/aarch64-oe-linux-gdb
  - Sysroot: /<SDK_INSTALL_DIR>/ti-processor-sdk-linux-am62xx-evm-10.01.10.04/linux-devkit/sysroots/aarch64-oe-linux
  - Qt version: "None"
  - CMake Tool" "System CMake at /usr/bin/cmake (Default)
  - CMake Configuration select "Change" and add the following lines
```
-DOE_QMAKE_PATH_EXTERNAL_HOST_BINS:STRING=%{Env:OE_QMAKE_PATH_HOST_BINS}
-DCMAKE_NO_SYSTEM_FROM_IMPORTED:UNINITIALIZED=1
```
Click "Apply" then "Ok"

Create a kit SDK 11

Navigate to toolbar: Edit->Preferences

Select the "Kits" category

On the Kits tab hit "Add"
Name: "arm64 qt 6 11 sdk"
Build device: Type: "Desktop"
Run device: Type: "Remote Linux Device"
Compiler: C/C++: GCC (C, arm 64bit at /<QT_TOOLCHAIN_DIR>/sysroots/x86_64-arago-linux/usr/bin/aarch64-oe-linux/aarch64-oe-linux-gcc)
Debugger: System GDB at /<QT_TOOLCHAIN_DIR>/sysroots/x86_64-arago-linux/usr/bin/aarch64-oe-linux/aarch64-oe-linux-gdb
Sysroot: /<QT_TOOLCHAIN_DIR>/sysroots/aarch64-oe-linux
Qt version: "None"
CMake Tool" "System CMake at /usr/bin/cmake (Default)

CMake Configuration select "Change" and replace contents with the following lines

-DQT_QMAKE_EXECUTABLE:FILEPATH=%{Qt:qmakeExecutable}
-DCMAKE_PREFIX_PATH:PATH=%{Qt:QT_INSTALL_PREFIX}
-DCMAKE_C_COMPILER:FILEPATH=%{Compiler:Executable:C}
-DCMAKE_CXX_COMPILER:FILEPATH=%{Compiler:Executable:Cxx}
-DQT_HOST_PATH:PATH=/export/home/jsava/ti_processor_sdk/ti-processor-sdk-linux-am62xx-evm-11.00.09.04/linux-devkit/sysroots/aarch64-oe-linux/usr/lib/cmake
-DQT_FORCE_FIND_TOOLS:UNINITIALIZED=ON
-DQt6WidgetsTools_DIR:UNINITIALIZED=/export/home/jsava/yocto_images/sysroots/x86_64-arago-linux/usr/lib/cmake/Qt6WidgetsTools/
-DQt6DBusTools_DIR:UNINITIALIZED=/export/home/jsava/yocto_images/sysroots/x86_64-arago-linux/usr/lib/cmake/Qt6DBusTools/
-DCMAKE_NO_SYSTEM_FROM_IMPORTED:UNINITIALIZED=1

Click "Apply" then "Ok"

Note: If the Compiler or Debugger are not automatically detected select their respective tab and add the paths above.

SDK 10.01 example kit:

Add the device

Navigate to toolbar: Edit->Preferences
- Select the "Device" category
  - In the "Devices" tab select Add->Remote Linux Device->Start Wizard
    - The name to identify this configuration: "Devkit"
    - The device's host name or IP address: <DEVKIT_IP_ADDRESS>
    - The username to log into the device: "root"
  - Hit "Next" until it prompts to "Finish" the creating the device
  - Device test should finish successfully
- Click "Apply" then "Ok"

Create a Qt Widget Project

Navigate to toolbar: File->New Project
- The following window should appear. Select "Qt Widgets Application"
- Name: "hello_world_gui"
- Next
- Build System: "CMake"
- Select "Next" until it prompts to "Finish" the project

Update UI Window

Navigate to the newly created project
- Select hello_world_gui->hello_world_gui->Froms->mainwindow.ui
- The "Design" Tab should now be open
  - Drag and drop a "Push Button" into the window
  - Navigate to "Object Inspector" on the right hand side of the screen
    - right click on "pushButton" and select "go to slots"
      - Hit "ok" in the pop up window

Update Source Code

Update mainwindow.cpp to have the following code:

#include "mainwindow.h" 
#include "./ui_mainwindow.h" 

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    color = 0;
    ui->pushButton->setStyleSheet("QPushButton {background-color: purple;}\n");
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{
    QString colors[4] = {"orange", "yellow", "green", "red"};
    color = (color + 1) & 0x3;

    ui->pushButton->setStyleSheet("QPushButton {background-color: " + colors[color] + ";}\n");
}

Update main.cpp to have the following code:

#include "mainwindow.h" 

#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    MainWindow w;
    w.setWindowTitle("Hello QT App");
    w.show();
    return a.exec();
}

Update Header files

Update mainwindow.h to have the following code:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

QT_BEGIN_NAMESPACE
namespace Ui {
class MainWindow;
}
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void on_pushButton_clicked();

private:
    Ui::MainWindow *ui;
    int color;
};
#endif // MAINWINDOW_H

Build the project by selecting the hammer in the bottom left hand side of the screen.

The project should build without any issues

Add Environment Variables

Qt Creator needs to know the following Environmental variables in order to launch on the Devkit
In the toolbar on the left hand side of the screen select "Project"

SDK 10.01
- Under "Build and Run" select arm64 qt 5 10.1 sdk->Run
  - In "Run Settings" find "Environment"
    - Select Details and add the following
```
WAYLAND_DISPLAY=/run/wayland-0
XDG_RUNTIME_DIR=/run/user/0
```

SDK 11
- Under "Build and Run" select arm64 qt 6 11 sdk->Run
  - In "Run Settings" find "Environment"
    - Select Details and add the following
```
LANG=C.UTF-8
LC_ALL=C.UTF-8
QT_QPA_PLATFORM=linuxfb
```

SDK 10.01 example environment variables:

Launch the project on the Devkit

In the toolbar on the left hand side of the screen navigate to the monitor icon with "Debug" below it
- Double check that the correct kit is selected
Select the green launch icon below the monitor icon

Note: For SDK 11 the following command must be ran on the Devkit in order to see the Hello World GUI

root@mitysom-am62x:~# systemctl stop emptty

The GUI window should now appear on the Devkit. Make sure the HDMI display is connected.

Try plugging a mouse into the USB on J6 and clicking the push button in the GUI.

It should change colors.

Files (6)

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clipboard-202505211349-jqnva.png (199 KB) clipboard-202505211349-jqnva.png		Job Sava, 05/21/2025 05:49 PM
clipboard-202505211356-egahn.png (77 KB) clipboard-202505211356-egahn.png		Job Sava, 05/21/2025 05:56 PM
clipboard-202505211413-jdzx1.png (174 KB) clipboard-202505211413-jdzx1.png		Job Sava, 05/21/2025 06:13 PM
clipboard-202505211428-pszpj.png (144 KB) clipboard-202505211428-pszpj.png		Job Sava, 05/21/2025 06:28 PM
clipboard-202505211443-tlhjj.png (130 KB) clipboard-202505211443-tlhjj.png		Job Sava, 05/21/2025 06:43 PM
clipboard-202505211449-pmnxx.png (60.2 KB) clipboard-202505211449-pmnxx.png		Job Sava, 05/21/2025 06:49 PM

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Mity CPU Platforms » MitySOM-AM62, MitySOM-AM62A, & MitySOM-AM62P

Wiki

Linux App Qt Creator¶

Objective¶

References¶

General Setup¶

Qt Creator CMake Hello_World example¶