Скачать или смотреть Reorder Peripheral Initialization Code in STM32CubeIDE for Optimal Performance

Learn how to reorder the initialization code generated by STM32CubeIDE for your STM32 projects to avoid issues like Hard-Faults during power-up.
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This video is based on the question https://stackoverflow.com/q/76126682/ asked by the user 'eloiz' ( https://stackoverflow.com/u/16756296/ ) and on the answer https://stackoverflow.com/a/76127113/ provided by the user 'pmacfarlane' ( https://stackoverflow.com/u/19639413/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Reorder the Peripheral Initialization Code in STM32CubeIDE

If you're a developer working with STM32 microcontrollers, you're likely familiar with the STM32CubeIDE tool provided by STMicroelectronics. It's a powerful Integrated Development Environment (IDE) that simplifies the development process, but sometimes it can generate code that doesn't suit your specific project requirements. A common situation involves issues arising from the order in which peripheral initialization code is executed. Let’s dive deeper into how you can reorder this initialization code effectively.

The Problem: Hard-Faults Due to Initialization Order

Recently, while working on a project using an LCD with external SDRAM connected to the FMC, one user reported encountering Hard-Fault errors on power-up. Upon investigation, it was found that the generated initialization code was not aligning correctly with the dependency requirements of the peripherals involved. Here's what the original order looked like:

[[See Video to Reveal this Text or Code Snippet]]

This sequence didn’t correctly handle the initialization requirements, particularly for the LCD's controllers. After moving the FMC initialization to occur immediately after DMA initialization, the issue was resolved, but the automatic generation of this code by CubeIDE meant that every time the project was built, these changes would be lost.

The Solution: Specifying Order in STM32CubeIDE

Fortunately, STM32CubeIDE allows you to reorder the initialization sequence effectively. Here's how to do this step-by-step:

Step 1: Open Your Project

Launch STM32CubeIDE and open the project you are working on.

Locate and open the .ioc file associated with your project. This file contains the configuration settings for peripherals and middleware.

Step 2: Access Advanced Settings

Click on the Project Manager tab at the top of the window.

On the left sidebar, find and click on the Advanced Settings box.

Step 3: Configure Generated Function Calls

Within the Advanced Settings, you’ll see a list of generated function calls along with their Rank fields. These ranks determine the order in which the functions are called during initialization.

Adjust the Rank fields as necessary, assigning lower rank numbers to functions that need to be initialized first. For example, if the FMC needs to be initialized right after DMA:

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Save and Rebuild

After adjusting the ranks, save your changes and rebuild the project.

Now, when the code is regenerated by STM32CubeIDE, it will respect the order you've specified, meaning you can avoid the pitfalls of incorrect initialization order.

Conclusion

By utilizing the Advanced Settings in STM32CubeIDE to specify the order of peripheral initialization, you can prevent issues like Hard-Faults and ensure that your peripherals are properly set up for optimal functionality. Remember that properly managing the initialization sequence can be crucial, especially in complex projects involving multiple peripherals with dependencies.

Now, the next time you face initialization issues, you will have the knowledge to address them right where it matters! If you have further questions or run into issues, feel free to reach out in the community for support. Happy coding!