USB: 1 device, 1 config, 2 HID endpoints on NCS 2.91. is this possible?

RE: USB: 1 device, 1 config, 2 HID endpoints on NCS 2.91. is this possible?

Kenneth — Tue, 10 Jun 2025 12:48:25 GMT

Hi,

In general USB samples are available under the zephyr/samples/subsys/usb/ catalog, and here's the documentation for each sample:
https://docs.nordicsemi.com/bundle/ncs-3.0.1/page/zephyr/samples/subsys/usb/usb.html

If you need more than one usb class, you should be able to look at the composite example or the hid-cdc example:
https://docs.nordicsemi.com/bundle/ncs-2.7.0/page/zephyr/samples/subsys/usb/cdc_acm_composite/README.html
https://docs.nordicsemi.com/bundle/ncs-2.7.0/page/zephyr/samples/subsys/usb/hid-cdc/README.html

For unknown reason it's not there in the latest ncs versions, but I don't see any reason why you should not be able to use the old examples at least as a guide on how to add several USB devices.

Kenneth

RE: USB: 1 device, 1 config, 2 HID endpoints on NCS 2.91. is this possible?

chromedev — Thu, 05 Jun 2025 19:40:53 GMT

I have FIDo2 on one of the descriptors. In Windows it appears that windows looks for a dedicated specific report descriptor and interface.

RE: USB: 1 device, 1 config, 2 HID endpoints on NCS 2.91. is this possible?

Turbo J — Thu, 05 Jun 2025 13:44:00 GMT

Why do you want a second endpoint?

In 99% of the cases you only needed a different HID report descriptor - remember that one descriptor can describe many different reports.

I am not 100% sure that you have OS support for IAD HID in windows, and it will also be difficult in zephyr.