STM32F429ZIT Read out protection RDP=2 long time

[martinmelkis9]

Posted on November 22, 2017 at 14:23

Hello all,

Our product is being programmed on test bench and after that it is locked setting the readout protection to level 2 (RDP level 2).

My question is - is it normal for this process to take about 3 minutes?

Are there any options to speed up this process?

The programming unit used is ST-Link v2.

Best regards,

Martin

#long-time #stm32f429 #readout-protection #rdp #rdp-level-2

[martinmelkis9]

Posted on November 22, 2017 at 18:41

More info:

Application used is command line version of ST link utility: ST-LINK_CLI.exe version 2.3.0.0. (located in the same folder). Using Windows10 32bit OS.

Command used: '-c SN=xxxxxxxxxxxxxxxxxxxxx SWD UR FREQ=4000 -P \'FW_PATH\' -V \'after_programming\' -OB RDP=2 -HardRst',

After programming and setting option bytes, the application returns error level code 13 which is not included in ST-LINK_CLI return codes description in document UM0892.

The same time it takes when using STM32 ST-LINK Utility.exe GUI version and the error message 'Cannot read option bytes' appears after the process. But I think in this case the application is trying to reconnect with target, but it is already locked.

MCU runs on 3.3V supply which is capable of 800mA current, ST-Link v2 runs from PC's USB.