MCUBoot private key on nrf5340dk

Hi,

Try adding these configs to your mcuboot.conf

CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256=y
CONFIG_PCD=y

Hi Øivind,

Thank you for your answer.

I tried to add to mcuboot.conf:

"

CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256=y
CONFIG_PCD=y

"

The build work, I had this message before flashing:

"

D:\elect\projets_nordic_D\dfu_peripheral_uart_private_key>west flash
-- west flash: rebuilding
[0/17] Performing build step for 'mcuboot_subimage'
ninja: no work to do.
[1/11] Performing build step for 'b0_subimage'
ninja: no work to do.
[2/7] Performing build step for 'hci_rpmsg_subimage'
[0/5] Performing build step for 'b0n_subimage'
ninja: no work to do.
-- west flash: using runner nrfjprog
Using board 960132679
FATAL ERROR: The hex file contains data placed in the UICR, which needs a full erase before reprogramming. Run west flash again with --force, --erase, or --recover.

"

So I tried: "west flash recover"

and I had this message from the Uart:

"

*** Booting Zephyr OS build v2.6.0-rc1-ncs1  ***
Attempting to boot slot 0.
No fw_info struct found.
Attempting to boot slot 1.
No fw_info struct found.
No bootable image found. Aborting boot.
"

It look like I miss something to make image bootable...

Here is a zip of my project:

Best Regards,

Rob

Hi Øivind,

I tried to increase "BOOT_MAX_IMG_SECTORS" to 256 or 512 or 1024, I added "CONFIG_BOOT_MAX_IMG_SECTORS=1024" in mcuboot.conf file,

but I still have the same error:

"

*** Booting Zephyr OS build v2.6.0-rc1-ncs1  ***
Attempting to boot slot 0.
Attempting to boot from address 0x8200.
Verifying signature against key 0.
Hash: 0x2e...e0
Firmware signature verified.
Firmware version 1
*** Booting Zephyr OS build v2.6.0-rc1-ncs1  ***
I: Starting bootloader
W: Failed reading sectors; BOOT_MAX_IMG_SECTORS=1024 - too small?
E: Unable to find bootable image

"

How can I go further ?

Hi Øivind,

I find the problem, now it's working.

I change the place were I have put ''mcuboot.conf", I put inside a folder called child_image and I deleate:

"

if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/mcuboot.conf")
    list(APPEND mcuboot_OVERLAY_CONFIG
      "${CMAKE_CURRENT_SOURCE_DIR}/mcuboot.conf"
      )
endif()

"

from CmakeLists.txt file.

Thanks you for your help.

Best Regards,

Rob

Ah, I apologize, I saw that it was in an unusual place, but I just assumed it was allowed on the older version of the SDK.

Great job figuring it out!

So everything is working now?

Hi Øivind,

everything work well with the sample project and the nrf5340dk.

I tryed to verify that I can update a new version with device manager, it's work too.

Also, I tryed to change the private key and send a bad version  from device manager, and the state was:"invalid (3)"

So it look like I need the right private key to upgrade new soft version with DFU.

After, I tryed the same thing with my custom board and my custom soft, everything work, except that I can upgrate with any private key... So I have a problem...

I will make a private ticket to understand why it do not work.

Best Regards,

Rob.

Hi Øivind,

I was wrong everything work well on the nrf5340dk and on my custom board, I just forget to change the path into "mcuboot.conf".

Thank you for all your help.

Best Regards,

Rob

Hi Øivind,

I was wrong everything work well on the nrf5340dk and on my custom board, I just forget to change the path into "mcuboot.conf".

Thank you for all your help.

Best Regards,

Rob