ncs dfu fail

[pipixia_1_1]

Hi,nordic teams

im develop a keyboard use nrf52840 by ncs sdk 2.6.when i test the dfu funcation by python file ,there is 2 problems .

1.the usb dfu is so slow that i need spend 10 mins can completed.

2.Actually, the upgrade was not successful。

My actions are as follows：

1.build and programm the application nrf_dektop;

2.modify the usb iproduct as “Keyboard nRF52 Desktop_dfu”

3.in the cmd window input cmd as https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/applications/nrf_desktop/doc/dfu.html#nrf-desktop-dfu describe。

4.the python implement dfu,and the speed is verly slow.

5.after dfu complete,the usb ipoduct  is also “Keyboard nRF52 Desktop”.so it dfu fail.

[Kenneth]

Hello,

Regarding DFU speed - it was intended for background DFU, so speed is not a priority here. We focused on avoiding negative impact on HID input reports. 

Regarding DFU is not successful - The B0 bootloader requires bumping image version for the DFU. Update image with lower or the same version is basically rejected. We would suggest to update CONFIG_FW_INFO_FIRMWARE_VERSION Kconfig option in application configuraton to higher number than used by currently booted image.

For details about B0 bootloader configuration in nRF Desktop, see: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.6.0/nrf/applications/nrf_desktop/bootloader_dfu.html#configuring-the-b0-bootloader 

Best regards,
Kenenth

[pipixia_1_1]

tks for your replay! it resolve my problem.