webusb next

[pengjie50]

hi:

There is an example of webusb next in Zephyr's latest Samples. I ran it with nrf52840 and encountered an error requesting the Microsoft operating system 2.0 descriptor set. I would like to confirm if nrf52840 supports webusb next

[Marte Myrvold]

Hi,

The reason you are not able to get HID keyboard and WebUSB-next to work at the same time is most likely related to the missing subset header, which is currently present only if CDC ACM is enabled: https://github.com/zephyrproject-rtos/zephyr/blob/3f6d78c26c6fa1126eda7de51183bcf055afe9e7/samples/subsys/usb/webusb-next/src/msosv2.h#L34-L45.

The sample should be modified to include the subset header if the HID class is added to it.

Best regards,
Marte