How to unlock RDP level 1 on a STM32U0k8

[JFP]

Hi,

I am working on a project using an STM32U031K8U6.I have been experimenting with various low power modes and somehow, It appears that I have accidentally set RDP level 1 protection.

I have been using STM32CubeIDE to create and build code and then I used Seggers J-Flash and a J-Link debugger to actually program the device. I was able to successfully program my MCU multiple times with this setup. The last time that I attempted to flash a new program I received the following error message:

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 Auto programming target (9124 bytes, 1 range) ...
- Connecting ...
- Connecting via USB to probe/ programmer device 0
- Probe/ Programmer firmware: J-Link V11 compiled Mar 14 2024 13:16:08
- Probe/ Programmer S/N: 601009238
- Device "STM32U031K8" selected.
- Target interface speed: 4000 kHz (Fixed)
- VTarget = 2.941V
- InitTarget() start
- RDP Level 1 protection is set. Reading flash memory is restricted.
- RDP Level 1 password is set.
- To unlock device please use Device Provisioner utility for STM32U0 option-bytes programming: https://wiki.segger.com/ST_STM32U0_Option_Bytes_Programming
- InitTarget() end - Took 48.5ms
- Found SW-DP with ID 0x6BA02477
- Failed to power up DAP
- InitTarget() start
- RDP Level 1 protection is set. Reading flash memory is restricted.
- RDP Level 1 password is set.
- To unlock device please use Device Provisioner utility for STM32U0 option-bytes programming: https://wiki.segger.com/ST_STM32U0_Option_Bytes_Programming
- InitTarget() end - Took 46.1ms
- Found SW-DP with ID 0x6BA02477
- Failed to power up DAP
- ERROR: Failed to connect.
Could not establish a connection to target.
- ERROR: Connect failed
- ERROR: Could not auto program target, not connected

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I attempted to use Seggers "Device Provisioner utility" without success. Is there some way to unlock this processor using the facilities in STM32CubeIDE or some other ST provided utility?

[Imen.D]

Hello @JFP ,

Could you please try with latest release of CubeProgrammer v2.16

Then, please keep me informed about your update.

[Imen.D]

Hi @JFP ,

I confirm that the regression from RDP 1 to 0 can't be done using STM32CubeProgrammer v2.16.

Our team are working to resolve this issue and will include a patch in the next version of CubeProgrammer to fix this.

Sorry, for the inconvenience it may cause and thank you for your understanding

[JFP]

Thanks for testing this. How soon do you expect to publish the next version of STM32CubeProgrammer?