Re: [OpenOCD-devel] STM32 - how to write to OTP memory with openocd

[Andreas F. <and...@gm...>]

On Thu, Jul 19, 2012 at 7:39 PM, Peter Stuge <pe...@st...> wrote:
> Andreas Fritiofson wrote:
>> stm32f2x otp enable
>
> This is a very good idea.
>
>
>> flash write flash_and_otp.elf
>> stm32f2x otp disable
>
> But the disable is redundant after having written once.

Not if you want to do

stm32f2x otp enable
flash write flash_and_otp.elf
flash write secret_key.bin 0x1fff7900
flash fillb 0x1fff7980 0x00 128
stm32f2x otp disable

The enable flag should probably autoreset *sometime* but I would have
to read the code to determine what's a reasonable point or event that
can be detected from the flash driver. I'll leave to Laurent to make a
suggestion. Having a possibility to manually disable it seems like a
good idea.

/Andreas