nrf_desktop application can't off the b0 bootloader

[Hannibalhz]

Dear Nordic Engineers

Our customers use the nrf_desktop  application to develop their product.

 They use the NCS 2.0.0\nrf\applications\nrf_desktop and build project on the nrf52840dk_nrf52840.

It looks normal. The program can run.

They would like off the b0 bootloader. So I went to their company to help them.

I read this link:https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.0.0/nrf/applications/nrf_desktop/README.html

The bo bootloader can set the following configs to open/off the b0 bootloader.
CONFIG_SECURE_BOOT
CONFIG_BUILD_S1_VARIANT
CONFIG_FW_INFO
CONFIG_FW_INFO_FIRMWARE_VERSION
CONFIG_SB_SIGNING_KEY_FILE

So I off this config on nrf\applications\nrf_desktop\configuration\nrf52840dk_nrf52840\prj.conf.

I rebuilt the project and it reports some errors. I found that it needs off "CONFIG_DESKTOP_CONFIG_CHANNEL_DFU_ENABLE".

Then the project can be built.I downloaded the program to PCA10056(V1.0.0). The program can't run. 

I review nrf_desktop\configuration\nrf52840dk_nrf52840\prj.conf of NCS V1.9.1 and NCS V2.0.0. Their difference is the following configs.

CONFIG_SECURE_BOOT
CONFIG_BUILD_S1_VARIANT
CONFIG_FW_INFO
CONFIG_FW_INFO_FIRMWARE_VERSION
CONFIG_SB_SIGNING_KEY_FILE

CONFIG_DESKTOP_CONFIG_CHANNEL_DFU_ENABLE

Do I need off other config? Please give me some good suggestions.

Best regards.

[Hannibalhz]

Dear Dejans

Yes,you can download merged2.hex to your PCA10056 and use your phone's bluetooth to scan advertising.I tried more times, it can't not found the advertising of DK.

Best regards. 

[dejans]

Hi,

I have reproduced the issue. In order to fix it, you would need to make several configuration changes.

From the original prj.conf, you should remove all lines related to bootloader configuration

CONFIG_SECURE_BOOT=y
CONFIG_BUILD_S1_VARIANT=y
CONFIG_FW_INFO=y
CONFIG_FW_INFO_FIRMWARE_VERSION=1
CONFIG_SB_SIGNING_KEY_FILE="configuration/nrf52840dk_nrf52840/b0_private.pem"

Additionally, from pm_static.yml you should remove everything except settings_storage section.

Best regards,
Dejan

[Hannibalhz]

Dear Dejans

Thank you for your good suggestion. I tested it,and it took effect.

But it can't delete everything except the settings_storage section. Because the WINDOWS will not find the advertising.

It only needs to delete B0 and S0 page setting.

 

The following file is my pm_static.yml.I hope it can help other people.

pm_static.7z

Best regards.