[SOLVED] Flasher ARM Stand-alone -secure device option does not seem to work

TimDay · Nov 29th 2010, 1:20pm

I have a Flasher ARM configured to program a STM32F, the project setting for Production, Auto - Secure chip is set.

In J-Link mode the auto option does secure the chip after programming, I cannot read back the chip contents via the Target, Read Back drop down menus, so far so good.

But when the Flasher is started in stand alone mode and a chip is programmed, the chip contents can be read back later in J-Link mode.

I assume that the chip has not been secured in standalone mode. How do I get the stand alone mode to secure the chip?

The Flasher code version is 4.14i

SEGGER - Alex · Nov 30th 2010, 9:30am

Hello,

thank you for the information.
We are already analyzing the problem.
We will inform you, as soon as a fix is available.

Best regards
Alex

djl · Jan 22nd 2015, 5:37pm

Hi,

is there a solution for this problem meanwhile?

I tried using Flasher with STM32F415RG, but 'Secure chip' still only works when using flasher in non-standalone mode!
Securing the chip is absolutely essential!

My device: SEGGER Flasher ARM V4.0

Regards
Dirk

SEGGER - Erik · Jan 27th 2015, 2:40pm

Hi,

Currently, Flasher does not perform the "Secure chip" sequence. This is still on our internal ToDo.
However, you should be able to lock the device in stand-alone-mode, by using the "Exit steps" (Project settings -> CPU -> Exit steps).
I can provide you with the secure chip sequence (c-style) so you can simply adapt it into the J-Flash project:

v = FLASH_OPTCR;
//
// If flash option control register is locked, unlock it
//
if (v & (1uL << 0)) {
JLINKARM_WriteU32(FLASH_OPTKEYR, 0x08192A3B);
JLINKARM_WriteU32(FLASH_OPTKEYR, 0x4C5D6E7F);
}
v &= 0xFFFF00FC;
//
// Set protection to protection level 1
//
v |= 0x000000FF << 8;
FLASH_OPTCR = v;
//
// Start option byte programming
//
FLASH_OPTCR |= (1uL << 1);
//
// Wait for operation to complete
//
do {
Status = FLASH_SR;
} while (Status & (1uL << 16));
FLASH_OPTCR = v | (1uL << 0)); // Lock access to flash option control register

The Do - While to wait for operation to complete, can be adapted by using BEQ or BNE action type or by simply adding a delay.
If you have any questions or need any help, please just let me know.

Best regards
Erik

djl · Feb 2nd 2015, 2:59pm

Hi,

thanks for your hints, i finally got it working with "Exit steps" :thumbsup:

.

I wasn't sure how to use BEQ/BNE so I easily took a delay of 100ms.

Now I can program my ARM Cortex M4 system with flasher in standalone mode, including read out protection.

Regards
Dirk

SEGGER - Erik · Feb 2nd 2015, 3:16pm

Hi,

Thanks for the feedback.
Good to hear that you have been successfully

I wasn't sure how to use BEQ/BNE so I easily took a delay of 100ms.

Maybe we can add a small description / example in the manual. Anyhow, using the fixed delay should be fine, too as it is only performed once (at the end of a programming session).

Best regards
Erik

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