[nRF52840df] Protect Specific UICR Registers from OTA Overwrites Without Modifying Bootloader Code

RE: [nRF52840df] Protect Specific UICR Registers from OTA Overwrites Without Modifying Bootloader Code

Sigurd — Thu, 06 Feb 2025 17:39:46 GMT

Hi!

We don't see how your changes affect the UICR registers.

[quote user="Pedro Arthur"]the UICR information on my devices is being erased after OTA[/quote]

Our bootloader won't do it.

And if you enable APPROTECT, uicrerase is not possible.

Maybe you have done some modifications in your code that deletes the UICR.

RE: [nRF52840df] Protect Specific UICR Registers from OTA Overwrites Without Modifying Bootloader Code

Pedro Arthur — Mon, 03 Feb 2025 18:48:45 GMT

Thanks for the reply! But for some reason, the UICR information on my devices is being erased after OTA, and I cannot modify any bootloader settings on devices that are already with clients.. The only solution I found was making the changes I showed above, and after these changes, the problem stopped occurring. In theory, the UICR should remain unchanged after an OTA update, but that hasn’t been the case for me, as it keeps getting erased. I would prefer not to modify any Nordic libraries to work around this issue. Is there any other alternative?

RE: [nRF52840df] Protect Specific UICR Registers from OTA Overwrites Without Modifying Bootloader Code

Sigurd — Mon, 03 Feb 2025 15:32:57 GMT

Hi!

See this post : RE: Does OTA DFU change the UICR information?