How to test ncs bootloader？

[Август]

Hello,

As shown in the question. I am testing the ncs bootloader b0 and mcuboot, but I don't know it's ok or not.

work condition

ncs: 1.6.1

board: PCA10056

I am following this link to test bootloader, but some questions puzzled me

1. prj_minimal.conf can't build pass.

   west build -b nrf52840dk_nrf52840 zephyr/samples/hello_world -p -- -DCONFIG_SECURE_BOOT=y -Db0_CONF_FILE=prj_minimal.conf

2. checking the public key doesn't work
Here is my cmd director:H:\mesh\ncs\zephyr\samples\hello_world>

When I put this cmd diff build/zephyr/nrf/subsys/bootloader/generated/public.pem <(openssl ec -in priv.pem -pubout) it returned The system can not find the file specified.

 

3. How to test ncs bootloader？

I can flash the firmware，but I don't know hwo to check it.

such as b0: I think I can use it update my application right ?

    mcuboot: I think I can use it update my mcuboot or application right? but how to check it?

Thank you.

[Vidar Berg]

Hello,

It seems like the prj_minimal.conf file is not allocating enough flash to the immutable bootloader. Did you try to build without '-Db0_CONF_FILE=prj_minimal.conf'?

To test DFU I suggest you start with the SMP server example mentioned here: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_nrf52.html#fota-upgrades. And please note that DFU of the bootloader itself is currently not supported on the 52 series.

[Август]

Hello，

Thanks for your quick response.

I have build without t'-Db0_CONF_FILE=prj_minimal.conf', it works fine.

I will test dfu according to your instructions. Can you tell me which devices are currently supported by dfu? and why DFU of the bootloader itself is currently not supported on the 52 series.

[Vidar Berg]

Hello,

All 52 variants support DFU provided you have enough flash for the secondary slot. The reason bootloader updates are not supported is that the DFU protocol currently lacks a mechanism to differentiate between bootloader and application updates.

[Август]

Thanks for your response.It's helpful to me.

Can you give me an example for update MCUBoot,I am a windows developer I can't  go to next step form this link. Thank you.

[Vidar Berg]

We only support update of the main application at the moment. As mentioned in my previous response, bootloader updates were not supported due to limitations with the current DFU protocol.