DFU mode read out protection

[Draxter]

Hello, 

I am trying to connect to the STM32F072C8T6 microcontroller via USB in the STM32CubeProgrammer, however I am getting:

"Device is under read out protection ! If you want to disable RDP please reconnect with Read Unprotect enabled"

So, when I check the Read Unprotect (MCU) checkbox, I get:

"Please Power off Power on your device."

After turning the power off/on, I see the same messages. I cannot connect to the MCU via USB in the STM32CubeProgrammer.

I have tried different versions of STM32CubeProgrammer:

• v2.16.0
• v2.15.0
• v.2.13.0
• v.2.10.0
• v.2.8.0

Moreover I tried on second computer with Windows 11 and I have the same issue.

I'm trying to connect my custom board, but I also checked another hardware board (BluePill ) with the same STM32F072C8T6 MCU and it doesn't work either.

Interestingly, using the DFU-util v0.8 program I can connect to the MCU and successfully read/write memory:

[Gaucho]

dfuse do not allow to flash elf file. it seems to not be a solution

[Gaucho]

where can i read how this incident has ended up. where is ticket 171192  ?

[zeboss49]

Hello,

same issue with an STM32F429.

In my project, using a HUB does not solve the issue.
Maybe because the HUB is an USB3 HUB connected to a USB3 port on the PC.

It makes sense if the issue is related to speed.

I'll give a try using an USB2 port and come back to share my experience.

[Draxter]

Hi @zeboss49,

Yes, please try connecting through a USB 2.0 port (or via a USB 2.0 hub connected to a USB 2.0 host).
That would be really helpful for the community to confirm whether the issue is related to USB 3.0 compatibility.

Thanks for checking and sharing your results!

[TLin.5]

Does this affect STM32U5 series as well?