CLI Over USB CDC ACM SDK example not working

[enukic]

I've been trying to integrate CLI over USB CDC ACM into my project, but I'm failing even to run the SDK example. 

CLI works fine over UART, but it won't run over USB.

- I am using unedited SDK example from /peripheral/cli (I tested this in SDK 15 and 17.2)

- I'm using nRF52840 DevKit  (NRF52840_xxAA_ENGA)

- I connected both nRF USB ports to my PC and they are shown in Device Manager's Ports list:

I am using PuTTY to communicate with the device (using the recommended settings form the Nordic Infocenter)

As I said, over UART, CLI works fine.

Can anyone tell me what the problem could be?

Thanks!

EDIT:

I tested /peripheral/usbd_cdc_acm example, and it works fine with same PuTTY config

Also, when I try to integrate CLI over USB in my project, I can't even detect USB CDC device in Device Manager, am I missing something here?

[Einar Thorsrud]

Hi,

The USB peripheral is too flaky on the Engineering A ICs to be usable, so I suggest you obtain a DK with a release version of the chip instead of engineering samples.

[enukic]

Thank you, Einar.

I wasn't aware of that. But considering the behavior of the USB port, that must be the case.

I'll get my hands on a DK with a release version of the chip as soon as possible.

[enukic]

I just wanted to confirm that PDK's USB was the cause of the problems.

My application works fine on PCA10056 v2.0.1 (NRF52840_xxAA_REV2)

Thanks for the assistance once more!