Add DFU support to custom HCI_RPMSG netcore image

[Dilawar Ali]

I have separate app core enabled with DFU and secure boot. I added all that support with help from this ticket  nRF5340 Firmware Update from external NOR QSPI flash 

DFU for net core works fine.But it only works with an hci_rpmsg included automatically. How can I include the netcore DFU support in modified hci_rpmsg project. We compile this project but no "net_core_app_update.bin" is generated. How can I generate this DFU binary?

On app core image I have following configs enabled?

prj.conf

CONFIG_NRF53_UPGRADE_NETWORK_CORE=y
CONFIG_BOOT_IMAGE_ACCESS_HOOKS=y
CONFIG_PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY=y
CONFIG_ADD_MCUBOOT_MEDIATE_SIM_FLASH_DTS=y

/child_image/mcuboot/prj.conf

CONFIG_PM_PARTITION_SIZE_MCUBOOT=0x10000
CONFIG_NORDIC_QSPI_NOR=y
CONFIG_NORDIC_QSPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096
CONFIG_NORDIC_QSPI_NOR_STACK_WRITE_BUFFER_SIZE=16

CONFIG_PCD_APP=y
CONFIG_UPDATEABLE_IMAGE_NUMBER=2
CONFIG_FLASH_SIMULATOR=y
CONFIG_FLASH_SIMULATOR_DOUBLE_WRITES=y
CONFIG_FLASH_SIMULATOR_STATS=n
CONFIG_BOOT_UPGRADE_ONLY=y


# Enable flash operations.
# CONFIG_SPI=y
CONFIG_FLASH=y
# This must be increased to accommodate the bigger images.
CONFIG_BOOT_MAX_IMG_SECTORS=256

# Disable netcore image OTA udpate
CONFIG_BOOT_IMAGE_ACCESS_HOOKS=n

[Sigurd Hellesvik]

Hi,

modified hci_rpmsg project.

The answer here depends on how you include the modified hci_rpmsg project into your application.

What is your method for having a custom image on the network core?

Regards,
Sigurd Hellesvik

[Dilawar Ali]

We treat it as separate project. we compile it separate and flash the netcore bin file via Jflash.
Can we include the modified hci_rpmsg as a child image? It will be best case scenario.

[Sigurd Hellesvik]

Dilawar Ali said:

Putting them in programmer it looks like images are not correct.

How so?

Dilawar Ali said:

In file "build/hrdfu/zephyr/.config" the MCUBOOT bootloader config is not set. Whereas it is defined in prj.conf. Also the partition table generated in build folder donot contain mcuboot_primary or mcuboot_primary_1.

To enable mcuboot for a sysbuild project, you must set SB_CONFIG_BOOTLOADER_MCUBOOT in sysbuild.conf.
You should not set mcuboot for the other images, I don't think.

[Dilawar Ali]

Thanks for the suggestion.

adding following configurations in sysbuild.conf I haven enabled the MCUboot, b0 and s1_image for app core.

SB_CONFIG_BOOTLOADER_MCUBOOT=y
SB_CONFIG_SECURE_BOOT=y
SB_CONFIG_SECURE_BOOT_APPCORE=y

I need to enable the bon and enable the netcore DFU update as well. But I can not add the following configuration in sysbuild.conf. 
Where should I place these configuration?

SB_CONFIG_SECURE_BOOT_NETCORE=y
SB_CONFIG_NETCORE_APP_UPDATE=y

Also looking at the Kconfig.dfu of sysbuild , If I need a DFU package for netcore I need to include the hci_rpmsg. Which will include the sample hci_rpmsg project. How can I enable this feature and use the custom hci_rpmsg?

config DFU_MULTI_IMAGE_PACKAGE_NET
	bool "Network core update"
	depends on SUPPORT_NETCORE
	depends on !NETCORE_NONE
	depends on !NETCORE_EMPTY
	depends on SECURE_BOOT_NETCORE

[Sigurd Hellesvik]

I am still looking into this, but it is taking some time, as sysbuild is new for us in technical support as well.

[Sigurd Hellesvik]

This is where I am at:

Before trying to add b0n to a custom network core image, I thought I should try to enable b0n with the default hci_rpmsg.
However, i got some errors during this that I have unfortunately not been able to resolve yet. I have asked our developers about this, but have yet to hear back from them so I pinged them again today.

[Dilawar Ali]

Thanks for the update. I will wait for your response.

[Sigurd Hellesvik]

I finally got an answer from our developers, and it seems that we do not yet have sysbuild support for what you are trying to do at this time. I am sorry that I mentioned Sysbuild earlier in this ticket, but I thought it was more ready than it is.

If you want to know more about when Sysbuild is ready for what you are trying to do, you can contact the Nordic Sales representative for your region.