STM32_Programmer_CLI to program the PKH into the OTP

[AVazquez]

Hi, All.

Program fuses values is a delicate task. I would like to confirm that it is possible to program PKH(Public Key Hash) using STM32_Programmer_CLI.

The PKH is stored in OTP WORD 24 to 31

For example: Set the value 0x9ffd3d2f into the word 24 (0x18) [pkh0]

STM32_Programmer_CLI -c port=usb1 -otp program wordID=0x18 value=0x9ffd3d2f

Is this right?

Is there a specific command to close the device from STM32_Programmer_CLI?

Thanks!

[Olivier GALLIEN · Accepted solution]

Hi @AVazquez​ 

First pay attention to the Topic/Community you post your question.

I understand you are working on STM32MP1, thus "STM32 MPUs" is the right topic to use.

Then yes you can write OTP with STM32CubeProgrammer and lock it afterward.

refer to

https://wiki.st.com/stm32mpu/wiki/STM32CubeProgrammer#How_to_fuse_STM32MP15x_OTP

Your suggested command looks correct, but pay attention to the procedure in order CubeProgrammer connect to U-boot to write OTP.

You can also use U-Boot as per details in this page with dedicated exemple for PKH :

https://wiki.st.com/stm32mpu/wiki/STM32MP15_secure_boot

Hope it help

Olivier

[AVazquez]

Hi @Community member​ 

That's all I needed to know.

Thank you very much!

Best regards

Alex