连接 MCU

Qt for MCU enables you to use subsets of QML and Qt Quick Controls to create user interfaces for devices that are powered by microcontroller units (MCU). It includes a new graphics rendering engine that has a low memory footprint and is optimized for MCUs and other resource-constrained devices.

You can connect MCU boards to a development host to build applications for them using the GNU Arm Embedded GCC compiler, libraries, and other GNU tools necessary for bare metal software development on devices based on the Arm Cortex-M processors. You can deploy the applications on MCUs to run and debug them using Qt Creator.

The toolchains are available for cross-compilation on Microsoft Windows, Linux, and macOS. However, the Qt for MCU SDK is currently only available for Windows.

For a list of Qt for MCU reference implementations, see the Qt for MCUs 文档编制。

要求

To use Qt Creator to develop QML applications for MCUs, you need the following:

• Qt for MCU SDK (只可用于 Windows)
• GNU ARM Embedded Toolchain

The hardware-specific requirements vary depending on the hardware platform you are developing for. For more information see:

• NXP 快速入门
• STM 快速入门
• Renesas 快速入门

设置开发环境

You must download and install the required software and create connections between Qt Creator and MCUs. The following subsections guide you through the setup process.

MCU 插件

To be able to develop applications for MCUs, you need the MCU plugin. This plugin is enabled automatically by the Qt Installer when you install Qt for MCUs.

指定 MCU 设置

To configure a connection between Qt Creator and your MCU board, select 工具 > Options > Devices > MCU :

1. 在 Qt for MCUs SDK field, specify the path to the directory where you installed Qt for MCUs SDK.
2. 在 Targets supported by the Qt for MCUs SDK field, select your MCU board.
3. 在 要求 section, ensure that the platform-specific requirements are met. This varies depending on the target chosen:
   • For STM32 targets:
     • The GNU ARM Embedded Toolchain or IAR ARM Compiler 路径。
     • The STM32CubeProgrammer install path.
     • The MCU SDK for the chosen target.
     • The FreeRTOS Sources for the chosen target.
   • For NXP targets:
     • The GNU ARM Embedded Toolchain or IAR ARM Compiler 路径。
     • The MCUXpresso IDE install path.
     • The MCU SDK for the chosen target.
     • The FreeRTOS Sources for the chosen target.
   • For Renesas targets:
     • The Green Hills Compiler 路径。
     • The Renesas Graphics Library 路径。
4. Select the Automatically create kits for all available targets on start option to create kits automatically.

   注意： You could also use Create Kit or Remove Kit to manually create or remove kits for the chosen target.

5. 选择 Apply to save the settings.

注意： You must restart Qt Creator if you chose to create kits automatically for all the available targets.

添加 MCU 设备

注意： This optional step is not necessary if you have already set up the MCU SDK as outlined in 指定 MCU 设置 .

Qt Creator automatically adds a default MCU device when you select Apply 在 MCU tab after configuring the MCU tool chain.

要添加 MCU 设备，选择 工具 > Options > Devices > Add > MCU Device > Start Wizard :

1. 在 Name field, give the device a name.
2. 在 Type field, select the board type.
3. 选择 Apply to add the device.

添加 MCU 套件

注意： This optional step is not necessary if you have already set up the MCU SDK as outlined in 指定 MCU 设置 .

Qt Creator automatically adds kits for all the available targets, if the Automatically create kits for all available targets on start option is enabled under the MCU settings tab.

To add kits, select 工具 > Options > Kits > Add :

1. 在 Name field, specify a name for the kit.
2. 在 Device type field, select MCU .
3. 在 Device field, select the MCU board for the kit.
4. 在 编译器 field, select the Arm GCC compiler for the kit.
5. 选择 Apply to add the kit.

运行 MCU 应用程序

You can use a wizard to set up a project for developing an application that you can run on MCUs. The project uses a subset of QML and Qt Quick Controls that are supported by Qt for MCU. For more information about developing applications for MCUs, see the Qt for MCU documentation.

To create an application and run it on a MCU board:

1. 选择 File > New File or Project > Application (Qt for MCU) > MCU Support Application > Choose .
2. Follow the instructions of the wizard to create the project.
3. 选择 Projects > Build & Run , and then select the kit for building the application and running it on the MCU board specified in the kit.
4. 选择 运行 to specify run settings. Usually, you can use the default settings.