Can we use STM32G0xx's Open Bootloader for the STM32L4R5xx series? If so, what changes should I make?

[Imen.D · Accepted solution]

Hello @Shilpashree Madhu​ ,

For the moment, OpenBL supports only STM32G0 and STM32G4 series.

So, you can customize it for other products series like STM32L4 series according to your needs:

• \STM32Cube_FW_G0_V1.5.0\Middlewares\ST\OpenBootloader
• \STM32Cube_FW_G0_V1.5.0\Projects\STM32G0C1E-EV\Applications\OpenBootloader

More information on OpenBL is available for example in USART protocol used in the STM32 bootloader (AN3155).

I recommend also that you refer to the following resources:

• FAQ STM32 boot process 
• GitHub - STMicroelectronics/stm32-mw-openbl: Provides the Open Bootloader library, part of the STM32Cube MCU Component "middleware", for all STM32xx series.
• AN2606 Application note "STM32 microcontroller system memory boot mode", you find related information to STM32L4xx bootloader.

 Hope my answer helped you!

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Imen