2023-09-19 01:04 AM
Hi, I need to update the firmware of my MCU from the UART. I mean without physically touching the BOOT pin, but only via serial commands (classic FW update of a product).
I'm not an expert, but I tried searching on the internet and I saw that for these things it is necessary to write a bootloader. It doesn't seem impossible, but for a non-expert it's not exactly simple.
What I wanted to ask is, I think this is a very common need among users, has STM created anything official to support this feature? Is there something already given and official that I can use without necessarily writing my own custom bootloader? Maybe even supported directly in CubeMX.
I've seen that there are dozens of amateur/community bootloaders available, but not knowing how to write it, I can't even evaluate whether it's done well or whether it's suitable for my application, which is why I'm looking for an official STM solution.
2023-09-19 01:42 AM - edited 2023-09-20 01:17 AM
The ST OpenBootloader behaves like the built-in STM32 bootloader. You can start from it and modify to your product. Also you can convince someone else to make a perfect bootloader for you.
2023-09-19 05:21 AM
You can jump to the system bootloader in code and use UART to program it through a supported UART interface.
2024-08-02 12:21 AM
Hello @FMass.1
Rajat here, May I know which controller are you using?
I have developed Custom boot loader for STM32L452 and I have also demonstrated the Firmware updates, Erase Flash Memory, and Read, and Write protection.
Let me know if you need help
you can connect with me on LinkedIn https://in.linkedin.com/in/metharajat5
or email metharajat5@gmail.com
I have attached a tera term log for the same.