Unable to start FUS. FUS version is 0.0.0.0 and FUS_STATE_ERR_UNKNOWN

KKIM.6 · ‎2024-03-12

I'm trying to fix a P-Nucleo-WB55 board using CubeProgrammer.

However, the board shows a 0.0.0.0 version of FUS and Stack and I cannot start FUS.

I don't know why there is no version because the FUS cannot be deleted forever in the FUS upgrade document.

So, How can I update FUS in this version?

The SBRV option byte is 0x3ffff is it common?

STTwo-32 · ‎2024-03-13

According to the SBRV value, FUS is not running. I suggest you try to update your firmware Following this wiki and using the last version (included in the version 1.18.0 of the STM32CubeWB).

Best Regards.

STTwo-32

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KKIM.6 · ‎2024-03-13

Could you send the link again?

I'm trying to upgrade FUS following the "STM32WB Firmware Upgrade Service wiki" but there is no description when FUS does not exist.

KKIM.6 · ‎2024-03-19

I couldn't solve this problem yet...

Remi QUINTIN · ‎2024-04-12

The SBRV value is pointing on the safeboot which means something went badly wrong during the update.

I assume the SFSA value to be FFFF protecting the last sector.

Did you already program this board?

I would be nice to get the ESE and SFSA values.

Then one thing that may work to recover your board in a manufactory state is to write the value 0x00008000 at the address 0x5800040C. This should work if ESE option byte is checked.