nRF52840 USB CDC ACM Windows 10 Unknown USB Device

[Sebastian]

Hi,

I compiled (using ARM GNU) and run the USB CDC ACM example found on SDK_14_0_0. I have windows 10.

Windows 10 do not reckognize it as a CDC device and instead I am getting an 'Unkown USB Device (Device Descriptor Request Failed' on the system device manager.

It seems as the VID and PID are wrong (at least to Windows 10). Windows run the device on driver 'usbpcap.sys'.

I tried changing the driver but couldn't make it. I also tried to manually load the .inf file provided with the example but Windows protest that it is not compatible with the device and prompts me to check if it is designed to work with Windows x64 based systems.

The firmware starts up fine because I can see the NRF log info up to the detection of the plug-in event and USB ready event.

I also tried loading the original .hex file provided with the example but got similar behaviour.

Any help greatly appreciated.

[Sigurd]

Hi,

Please provide some more information.

• Do you have this problem with other USB examples in the sdk ? Could you test with e.g. usbd_hid_generic example ?

• What version of the nRF52840 PDK are you using? It should be printed below PCA10056 on the sticker on the kit.

• Do you have more than 1 nRF52840-PDK you can test with?

• Do you have custom boards using "engineer samples" ?

If you are using engineer samples:

• How many of these custom boards with engineer samples do you have ?
• What is the build code on the engineer samples? (This is printed on the chip)

[Sebastian]

Hi Sigurd,

Thanks for taking the time to ask:

1. I have tried hid generic and get exactly the same result. (My) Windows 10 do not reckognize the USB device.
2. I am using v.0.9.2
3. I have 2 PDKs. Both of them have the same result
4. No I don't have custom boards. My test was run on a normal Nordic PDK 52840 V0.9.2 with code from SDK14.0.0

Any help appreciated.

[Sebastian]

Hi Sigurd,

I gave it another try after your comment. The example works on only one of my Dev kits. The Dev kit that it works is V0.9.2 2017.27 The example does not work in dev kit V0.9.2 2017.33. Any ideas?

[Sigurd]

Hi Sebastian,

From your description, I suspect it could be a issue with one of your nRF52840-PDK board. Please create a Mypage support case ticket regarding this issue, and we will find a solution for you. Remember to add the information about the board version in the MyPage ticket.

[Sebastian]

Thanks Sigurd, will do so.