Could not disable RDP at STM32WB55CEUX chip in my custom board

qpdkvn · ‎2019-09-19

I had a problem while uploading firmware into my custom board.

I used ST-Link attached at NUCLEO-F091RC board, and I could read Option Bytes and Memory at 0x00000000 using ST-Link Utility and STM32CubeProgrammer.

But I can't read or erase flash memory.

It notifies "Can not read memory! Disable Read Out Protection and retry."

and when I try to change Option bytes, notifies "Could not set Option bytes! Please reset the target and retry."

and this is the log when I tried to download and debug with STM32CubeIDE.

STMicroelectronics ST-LINK GDB server. Version 5.2.3

Starting server with the following options:

Persistent Mode : Disabled

Logging Level : 1

Listen Port Number : 61234

Status Refresh Delay : 15s

Verbose Mode : Disabled

SWD Debug : Enabled

Waiting for debugger connection...

Debugger connected

-------------------------------------------------------------------

STM32CubeProgrammer v2.1.0

-------------------------------------------------------------------

Log output file: C:\Users\ADMINI~1\AppData\Local\Temp\STM32CubeProgrammer_a17080.log

ST-LINK SN : 066AFF545753845187161939

ST-LINK FW : V2J33M25

Voltage : 0.00V

SWD freq : 4000 KHz

Connect mode: Under Reset

Reset mode : Hardware reset

Device ID : 0x495

Device name : STM32WBxx

Flash size : 512 KBytes

Device type : MCU

Device CPU : Cortex-M0+/M4

Memory Programming ...

Opening and parsing file: ST-LINK_GDB_server_a17080.srec

File : ST-LINK_GDB_server_a17080.srec

Size : 10288 Bytes

Address : 0x08008000

Erasing memory corresponding to segment 0:

Erasing internal memory sectors [8 10]

Error: failed to erase memory

Encountered Error when opening D:\Tools\STMicroelectronics\STM32CubeIDE_1.0.0\STM32CubeIDE\plugins\com.st.stm32cube.ide.mcu.externaltools.cubeprogrammer.win32_1.0.0.201904021149\tools\bin\STM32_Programmer_CLI.exe

Error in STM32CubeProgrammer

Target is not responding, retrying...

Error! Failed to read target status

Debugger connection lost.

Shutting down...

This is the default option bytes.

I think the problem is RDP isn't Level 0.

How can I upload firmware to my custom board or disable RDP?

Thank you.

azzurri · ‎2021-06-14

Yes, I have performed a full power cycle.

Could you come up with any other alternative or the board is blocked definitely? Thanks again.

Remi QUINTIN · ‎2021-06-14

Can you still read the FUS version?

azzurri · ‎2021-06-14

I am getting "Error: -fusgetstate command is not available for SWD interface."

The connection through usb is not working either (target device not found).

Remi QUINTIN · ‎2021-06-14

OK to be able to read the FUS version, you have to be is USB DFU mode. This command will be supported from SWD interface in the next CubeProgrammer versions.

To be in USB DFU mode, you have to set the nSWBOOT0 option byte to 1 and set the PH3/BOOT0 to 1.

Then reconnect the device with the CubeProgrammer tool and read the FUS version. You may have to call the function twice.