Can you give me a sample about how to USB to DFU the network core?

[ken.oujingxue]

Hello

The NCS version is 2.1.0

I can use the sample "zephyr\samples\subsys\usb\dfu" to DFU the applicate core.

But I don't know how to DFU the network core, can you give a sample(network core DFU) base on the "zephyr\samples\subsys\usb\dfu"?

Thank you.

[Amanda Hsieh]

Hi, 

I have nRF53 MCUBoot Serial Recovery Sample over USB CDC for netcore and appcore with mcumgr sample netcore_serial_recovery_cdc_acm.7z for NCS2.2.0, but it's not based on that USB sample. 

Add the following log to the main function in the zephyr\samples\bluetooth\hci_rpmsg\src\main.c

	printk("Board config %s\n", CONFIG_BOARD);
	printk("IMAGE_VERSION %d\n", CONFIG_FW_INFO_FIRMWARE_VERSION);
	printk("build time: " __DATE__ " " __TIME__ "\n");

Build and flash the program using west:

west build -p -b nrf5340dk_nrf5340_cpuapp && west flash --recover

Connect the terminal, and it would show as the following.

Then, Modify the version number in the prj.conf and hci_rpmsg.conf, and recompile the project for the update. 

To activate the Serial Recovery Mode, hold Button 1 while restarting the Developement Kit. Now, you should be able to communicate with the bootloader using mcumgr:

mcumgr conn add acm46 type="serial" connstring="COM46,baud=115200,mtu=512"
mcumgr -c acm46 image list

The list command should print:
Images:
image=0 slot=0
version: 1.0.0.0
bootable: false
flags:
hash: Unavailable
Split status: N/A (0)

Locate under build\zephyr and update new images for appcore and netcore:

mcumgr -c acm46  image upload -e app_update.bin -n 1
mcumgr -c acm46  image upload -e net_core_app_update.bin -n 3

Redet the nRF5340DK:

The netcore would not boot up with the new image in after updating in v2.1.0. It's fixed in v2.2.0.  

Hope this can help. 

Regards,
Amanda H.

[ken.oujingxue]

Hello

Thank you for your reply.
Another question, how to DFU the mucboot？

[Amanda Hsieh]

See my colleague's sample to test updatable bootloaders at Sample on how to use NSIB(b0) to update MCUBoot feat. SMP Server.

-Amanda H.

[ken.oujingxue]

Thanks