Error when updating FUS firmware

[ANist]

I am trying to update the FUS firmware to the latest version on a STM32WB55CG, following the guide in the release notes I get Error: Firmware not authentic!. at step 5 (RSS_IMAGE_NOT_AUTHENTIC).

I have the latest CubeProg version and my actual FUS is 0.5.3

Am I doing something wrong?

Thanks!

[Remi QUINTIN]

I Just saw that the SFSA pointer is set to 0. This is not a good news.

Did you never manage to upgrade the FUS on this Nucleo board?

Which port did you use?

Were you able to load FUS v1.1.0, I would be able to recover from this situation.

Now there is nothing obvious to do.

[abbas14]

Nope, I was never able to upgrade this device!

I just set the read protection byte to 0xBB (from the default 0xAA), and it's stuck since then.

This device is on a custom board, and is being programmed through ST-Link.

[Kolab]

I was getting such as error. But after typing STM32_Programmer_CLI.exe -c port=usb1 -r32 0x20030030 1 it showed that the firmware has been updated. I was seeing 0x20030030 00000000 but now I see 01000200. Anyway it doesn't work.

[Remi QUINTIN]

So the FUS had indeed been upgraded. Unfortunately, this is not enough to get your board back to work as the SFSA pointer = 0.

This is a quite weird situation as this sequence should not failed , leading to this blocked board.