RE: settings_subsys_init() causes a bus fault on nrf52840-Dongle

Marte Myrvold — Tue, 01 Mar 2022 11:09:25 GMT

Hi,

[quote user=""]Do I need to manually alter the way that the persistent Zigbee pairing data is stored in flash?[/quote]

Yes, this is correct. The bootloader on the dongle starts at address 0xE0000 and occupies the rest of the flash, but from partitions.yml you see that the partitions for zboss_nvram and zboss_product_config start at 0xF5000 and 0xFD000.

To fix this all you need to do is to create static partitions, as I have done in my own project here: light_bulb_dongle. This is done by creating a file called pm_static_nrf52840dongle_nrf52840.yml with the following:

EMPTY_0:
  address: 0x0e0000
  end_address: 0x100000
  region: flash_primary
  size: 0x20000
# SRAM reserved to be used by the nRF5 Bootloader
EMPTY_1:
  address: 0x20000000
  end_address: 0x20000400
  region: sram_primary
  size: 0x0400

This file should be added in your project folder, so in the same location as CMakeLists.txt and prj.conf. This way, when you build the project for the dongle the file will be automatically added in the build.

I just tested using this in the light bulb sample myself, and with it my dongle was able to start up and join a Zigbee network.

Best regards,

Marte