Bootloader USB fails to enumerate device on Windows 10 (nrf 54820 development kit)

[Cecylia]

Hi there,

nRF52840-Preview-DK, 0.9.3 2017.43
nRF5_SDK_15.2.0_9412b96
IAR for ARM 7.60.1
Windows 10 Home
Version 1803
OS build 17134.590

When I try to run secure_bootloader_usb_mbr_pca10056 and enter into DFU mode, I get notification from Windows "USB device not recognized".

On the device manager, it fails to show on the Ports' tab, and under USB controllers it shows "Device Descriptor Request Failed"

When I check the driver, or update the USB driver to point to C:\Users\cwati\Documents\My Work\Nordic\nRF5_SDK_15.2.0_9412b96\examples\usb_drivers
it says "The best drivers for your device are already installed".

However, when I run the example C:\Users\cwati\Documents\My Work\Nordic\nRF5_SDK_15.2.0_9412b96\examples\peripheral\usbd_cdc_acm
It works totally fine.  It shows on the Device Manager and I could run it okay.

So, I'm not sure if it's hardware.  Another thing is, on the USB Bootloader DFU, it shows this on nRF Connect:


Please let me know if I'm missing anything to enable USB for Bootloader's USB DFU.

Thanks,
Cecylia

[Sigurd]

Hi,

Cecylia said:

nRF52840-Preview-DK, 0.9.3

This PDK version uses a engineering A revision of the nRF52840.

From SDK 15, the support for engineering A devices were dropped. See this compatibility matrix. I would strongly recommend that you develop on a nRF52840-DK, as this uses the production silicon.

[Cecylia]

Thanks Sigurd!  I'll just try it on our production PCB directly then