Get DFU callback in the applicaiton

[Mustafa]

Hello, 

I'm trying to find a way to get an event or callback in the application when DFU start updating or downloading image using BLE. 

so far I found CONFIG_MCUBOOT_ACTION_HOOKS but I'm now sure if this is the correct way, but anyway I added 

CONFIG_MCUBOOT_ACTION_HOOKS to the mcuboot in the child_image and still getting this error 

bootutil\mcuboot_status.h:27:40: error: expected identifier or '(' before 'do'
27 | #define mcuboot_status_change(_status) do {} while (0)

platform:

ncs: v2.2.0

 

Application: is based on light sample (mesh) and using the dfu settings of the sample

soc: nrf52480

Best regards

[Sigurd Hellesvik]

Hi,

There is a difference between a Bootloader and Device Firmware Update (DFU).

The Bootloader boots and swaps images.
DFU transfers images to the device.

When you are downloading a new image over Bluetooth Low Energy, this is DFU and is handled in the application. The Bootloader is not active during this.

Are you using Zephyr Device Management to perform DFU?

Regards,
Sigurd Hellesvik

[Mustafa]

Hi Sigurd, 

Actually what I meant is that I would like to have a callback on the application level for the following events:

* downloading image using BLE ( DFU callback) 

* prepare an application for a reboot 

and after that Callback in the bootloader level for swapping the image and upgrading the fw. 

 I aim to attach a led indication by every step to inform the user about the progress steps. 

for MCU bootloader  I'm using the zephyr device management

Best regards,

Mustafa 

[Sigurd Hellesvik]

Mustafa said:

* downloading image using BLE ( DFU callback) 

See MCUmgr Callbacks.
You can see an example of this in our matter samples.

Mustafa said:

prepare an application for a reboot 

If you are using the "os_mgmt" for reset, it should be similar to the above solution.

Mustafa said:

and after that Callback in the bootloader level for swapping the image and upgrading the fw. 

In this case, CONFIG_MCUBOOT_ACTION_HOOKS is the way to go.

However, as far as I can find, you can not add these hooks from your project.
I think that the easiest way to do this would be to add a ".c" file with your hooks to the bootloaders/mcuboot/boot/zephyr/

Here is a sample showing one possible solution.
It may not be the best solution, as the MCUboot project is not built for our multi-image build concept, but it seems to work as expected on my end.

https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/blob/main/bootloader_samples/custom_image_hooks/mcuboot_patch.diff

This code/configuration is not thoroughly tested or qualified and should be considered provided “as-is”. Please test it with your application and let me know if you find any issues.

Regards,
Sigurd Hellesvik

[Mustafa]

Thanks, Sigurd,

I think that  CONFIG_MCUMGR_MGMT_NOTIFICATION_HOOKS is not supported in ncs2.2.0 right?

best regards!

[Sigurd Hellesvik]

Hi,

Yes, it looks like MCUmgr callbacks are not yet supported in 2.2.0.

Regards,
Sigurd Hellesvik