Flash Memory Configuration for UART Bootloader and Application – STM32U5 Series

[ram_jan]

Hi Team,

Could you please guide me on how to correctly configure the internal Flash memory for the STM32U5 series? Specifically, I would like to understand how to:

• Modify the Flash start and end addresses

• Set appropriate lengths

• Partition the Flash to allocate separate regions for the bootloader and the application image

• Are there any configurations in STM32 Cube IDE to make those changes (Referred Version: 1.18.0)
• UART Read failing While sending image over a xmodem, does it fail because of any configurations issue?

Thanks and Regards

ram_jan

 

[Andrew Neil]

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@ram_jan wrote:

• UART Read failing While sending image over a xmodem, does it fail because of any configurations issue?

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You'd need to give more details of the particular failure to be able to answer that, but UART operation shouldn't be affected by Flash configuration.

[ram_jan]

Hi Andrew Neil,

I am currently working on the SBL UART operation for an STM32U5x-based SoC and referring to the implementation from the link mentioned earlier. My goal is to partition the internal flash into two sections:

• Bootloader: 32KB

• Application Image: Remaining flash space

By default, the internal flash base address is 0x08000000, but I need to modify this to suit the partitioning requirement. With the default flash configuration, I am attempting to receive the .bin application image over XMODEM. However, the execution halts and hits the following error:

"No source available for "<signal handler called>() at 0xfffffffe"

Could you please guide me on how to correctly configure the internal flash memory for the STM32U5 series? Specifically, I would like to know whether any settings need to be changed in STM32CubeMX or elsewhere to support this flash partitioning and prevent the above error.

Note : Please Guide me on modifying the starting address of internal flash for Application image, Please share your thoughts on how do it using any settings in CubeMX etc ?

Thanks,

 

 

 

[Andrew Neil]

I don't know about the flash configuration.

 

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@ram_jan wrote:

I am attempting to receive the .bin application image over XMODEM. However, the execution halts and hits the following error:

"No source available for "<signal handler called>() at 0xfffffffe"

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The IDE should show you the call stack for how it got there.

Sounds like a Hard Fault:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/tac-p/708193/highlight/true#M51