Failure of building project with support of DFU

[Illia Alexandrov]

Hello.

I am trying to repeat the functionality of the project that is shown in this video https://www.youtube.com/watch?v=fCU8x-pmtqU&list=PLx_tBuQ_KSqG-leiJDfOKf_ZmCqHnbi4r&index=8&ab_channel=NordicSemiconductor.

I get the following errors:

Here is my sysbuild.conf:

SB_CONFIG_PARTITION_MANAGER=n
#Enable MCUboot bootloader support
SB_CONFIG_BOOTLOADER_MCUBOOT=y
#DO NOT FORGET TO USE YOUR OWN PRIVATE KEY FOR SIGNING THE IMAGE

SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="C:/ncs/v2.8.0/bootloader/mcuboot/scripts/priv.pem"

prj.conf:

# Logger module
CONFIG_LOG=n

# Button and LED library
CONFIG_DK_LIBRARY=y

# Bluetooth LE
CONFIG_BT=y

CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME="MY_LBS1"
CONFIG_BT_SMP=y

# Increase stack size for the main thread and System Workqueue
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
CONFIG_MAIN_STACK_SIZE=2048

CONFIG_NVS=y
CONFIG_BT_NSMS=y


CONFIG_SPI=y
CONFIG_GPIO=y
CONFIG_PRINTK=y
CONFIG_USE_SEGGER_RTT=y

CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y

the key was generated by the following command:

python3 c:/ncs/v2.8.0/bootloader/mcuboot/scripts/imgtool.py keygen -t ecdsa-p256 -k priv.pem

from here https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/topic/exercise-2-dfu-over-usb-adding-external-flash/

I use NCS 2.8.0. Let me know if you need any additional information.

I understand that this is an outdated example. Please help me know how to fix the error or generate the key correctly. How was the key generated in the video of the respected Ali Aljaani? I will be grateful for your help.

[Vidar Berg]

Hello,

If you wan't to use a 'ecdsa-p256' signature, you need to add SB_CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256=y to your sysbuild coniguration. Otherwise, it will default to RSA. Which board are you building your project for, is it 'nrf52dk/nrf52832'?

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/releases_and_maturity/migration/migration_sysbuild.html 

Best regards,

Vidar

[Illia Alexandrov]

Hello.

Thank you for your reply. I am using a custom board with nrf52832 chip. With SB_CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256=y I got this:

[Illia Alexandrov]

If I use this c:/ncs/v2.8.0/bootloader/mcuboot/scripts/imgtool.py keygen -t rsa-2048 -k priv.pem

I still get this: 

Maybe the problem is not in the key?

[Vidar Berg]

The mismatched key types were one of the problems. The other problem seems to be that the bootloader requires CONFIG_MULTITHREADING to be enabled when built for your board. I assume you are not seeing these linker errros if you build for the nRF52DK? Please try to enable CONFIG_MULTITHREADING=y for mcuboot.

[Illia Alexandrov]

Hello. Yes, for, DK everything is built. CONFIG_MULTITHREADING=y did not help. I made some changes to my board file (added toolchain:
- zephyr
- gnuarmemb
- xtools
supported:
- gpio
- nvs
- i2c
- spi) and everything is built, but I can't flash the board. I also get a warning in mcuboot.conf: The active build context 'build' does not use this file. 

Can you please tell me what hex files I need to find to flash the board manually using the NRF programmer? I try to flash c:\ncs\v2.8.0\zephyr\samples\my_projects\lbs_test\build\mcuboot\zephyr\zephyr.hex and c:\ncs\v2.8.0\zephyr\samples\my_projects\lbs_test\build\lbs_test\zephyr\zephyr.signed but nothing happens. It looks like this.

[Vidar Berg]

Hello,

You can load the "merged.hex" file.

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/config_and_build/output_build_files.html#common_output_build_files