nRF52840 adding out endpoint to usbd_hid_generic example in SDK 15

[HSh]

Hello Nordic experts,

I am trying to add an output endpoint to the usbd_hid_generic example in nRF5_SDK_15.0.0_a53641a. I exactly followed the suggestions in 

https://devzone.nordicsemi.com/f/nordic-q-a/36145/nrf52840-usbd_hid_generic-endpoint-out-error

However, when I monitor the usb with Bus Hound, there is no sign of Endpoint 1 OUT. Please have a look at the attached photo. Can you please help me to understand what I am doing wrong?

Moreover, in the attached photo, you can see that (34) USB Input Device does not have any sub-port/branch, while for the usbd_hid_generic without any modification, there was a sub-port similar to (20) in the attached photo.

Thanks

[Håkon Alseth]

Hi,

 

Sorry for the late reply, I can confirm that I see the same thing and it took a bit of time to find the source of the issue.

This is a bug from our side, where line 452 in app_usbd_hid_generic.c loops over "i" instead of "j".

If you change it to this, it should work as expected:

p_cur_ep = app_usbd_class_iface_ep_get(p_cur_iface, j);

 

Could you try this and report back?

 

Kind regards,

Håkon

[HSh]

Great, this resolves the issue. Thanks a lot.