RDP Protection

[giwonKIM]

Hi I'm using STM32F411RET6 MCU.

I tried to connect using the programmer to download the firmware, but there was an error as shown below, and the data cannot be read.

13:18:34 : UR connection mode is defined with the HWrst reset mode
13:18:34 : ST-LINK SN : 54FF71067880565211170167
13:18:34 : ST-LINK FW : V2J45S7
13:18:34 : Board : --
13:18:34 : Voltage : 3.22V
13:18:34 : SWD freq : 4000 KHz
13:18:34 : Connect mode: Normal
13:18:34 : Reset mode : Software reset
13:18:34 : Device ID : 0x431
13:18:34 : Revision ID : Rev A
13:18:34 : Debug in Low Power mode is not supported for this device.
13:18:34 : UPLOADING OPTION BYTES DATA ...
13:18:34 : Bank : 0x00
13:18:34 : Address : 0x40023c14
13:18:34 : Size : 8 Bytes
13:18:34 : UPLOADING ...
13:18:34 : Size : 1024 Bytes
13:18:34 : Address : 0x8000000
13:18:34 : Read progress:
13:18:34 : Error: Data read failed

After that, the firmware will not be downloaded, and the message core is locked up.

I checked that it was a problem related to RDP, and it was set to FF.

RDP cannot be set to another level.

How do you solve this problem?

[Ghofrane GSOURI]

Hello @giwonKIM 

I am moving this thread to the CubeProgrammer forum to ensure you receive more specialized assistance.

THX

Ghofrane

[TDK]

If the chip is in RDP level 1, you will not be able to read the flash memory. A full chip reset is required in order to set it back to RDP level 0.

What happens when you select 0xAA for RDP and hit apply?

[giwonKIM]

Thank you for your service.

[giwonKIM]

If convert to 0xAA and press apply, you get an error that you cannot change it, and the value 0xFF is read again.

[Bob S]

Is this a NUCLEO or other ST dev board or your own custom board? If your own custom board, show the schematic for the debug/SWD connector to the STM32 chip.

Have you EVER been able to program this particular board?