How to born nrf_desktop's image to nrf52840dongle

[sam]

I'm now trying to test dongle on nrf52840dongle board：

  1.   west build -b nrf52840dongle_nrf52840 -- -DCONF_FILE=prj_4llpmconn.conf

  2.  open nRF Connect for Desktop's  Programmer.

  3. add the build\zephyr\merged.hex to Programmer.

  4. start write to nrf52840 dongle board.

  5. Prompt to select softdevice, and i select "0x100(s140_nrf52_7.2.0)".

  6. get message"Error: Failed with exit code 1. One or more program tasks failed. Message: Failed, [sdfu]."

  7. try other softdevice, get the same result.

   Am I overlooking something or a step?

    **Environment

• OS: Windows
• Toolchain: Zephyr SDK 0.16.3, python 3.10.11, west 1.2.0
• nrf connect SDK v2.5
• nrf52840 dongle (PCA10059)
• nRF Connect for Desktop 4.2.0 ,  Programmer 4.0.1

[Simonr]

Hi

Okay, I was just able to reproduce this on my end as well, and it seems like this is an issue with the nRF Programmer app not recognizing the file having a SoftDevice Controller for some reason. This seems to be the case for older NCS versions as well unfortunately, so I have reported this to the development team. In the meantime you can use either nrfutil or an external debugger to program the nRF52840 Dongle.

I'll let you know of any updates to the internal ticket that's been created on this.

Thank you for your thorough explanation!

Best regards,

Simon

[david_owtschinnikow]

Hi, is there any updte on this subject? I find the same problem.

Thank you

Best regards

David 

[Lorenzo Amicucci]

Hi 
nRF Desktop in general uses B0 or MCUboot, when you build default configurations. if you get the hex file from default configurations for dongle, you need to use SWD to flash it into the dongle.

if, instead, you want to build an image that can go on top of the native bootloader which is in the dongle (the old nrf5 bootloader), you can try to add the following in your proj.conf file

CONFIG_FLASH_LOAD_OFFSET=0x1000
CONFIG_BOARD_HAS_NRF5_BOOTLOADER=y

Plesae confirm if it works or which error you get

BR
LA

[david_owtschinnikow]

Hi,

I trying the option of building an image on top of the native bootloader. The Zephyr project builds correctly with the configuration you told me, but when loading the zephyr.hex file in nrf connect there is no option to flash it:

I don't know what I am doing wrong

Best regards

David