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

[Spencer O. <sp...@sp...>]

On 18 July 2012 16:33, Laurent Charpentier <lau...@ya...> wrote:
> Hi Everyone,
>
> I would like to write to the OTP (One Time Programmable) memory of the STM32F2 thru openocd.
>
> The OTP is part of the Flash according to the reference manual (RM0033 Reference manual from ST). The OTP_START_ADDR is 0x1FFF7800. However the OTP memory is not considered as a memory bank (memory banks are used to store programs - range is 0x0800 0000-0x080F FFFF).
>
> I tried to write to the OTP memory using:
> set OTP_START_ADD 0x1FFF7800
> set foo [format "%02X%02X%02X%02X" 0 111 111 102 ] # this is string "foo"
> flash fillw $OTP_START_ADD $foo 1
>
> and openocd return the following error:
> "No flash at address 0x1fff7800"
>
> Looking at the source code for "src/flash/nor/core.c" I saw that the "flash fillw" is coded in a way that only addresses within one of program banks can be used (i.e. 0x0800 0000-0x080F FFFF).
>
> Question: how to write to OTP thru openocd?
>

I am afraid it is not currently supported for the stm32f2x driver,
even writing the options is not supported.
If you fancy having a go then have a look at the stm32ff1x driver as a
reference.

Cheers
Spen