nRF52840 TinyUSB Serial driver?

Development Boards Arduino
1

I recently purchased a SparkFun Pro nRF52840 Mini and I am trying to use it with a Windows machine. When I plug in the board to USB and trigger boatloader mode, it shows up as a removable drive in Windows 7. However, in Device Manager the board doesn’t show up in the list of COM ports; rather it is “TinyUSB Serial” and lacks a driver. I have searched extensively and cannot find any information about the proper driver to provide it. Does anyone have ideas?

More info:

I have been able to upload a sketch successfully to the board from my (apple) laptop, and the board performs as expected when I do so. I figure that means there is nothing wrong with the board itself.

In both MacOS and Windows, I successfully used the Board Manager to install the nRF52 core, then made the modifications as listed in Sparkfun’s nRF52840 Development guide. In both cases, I am able to select the board in the Arduino IDE->Tools menu->Board submenu. On my Mac, I can also select the serial port that the Arduino is plugged into (through Tools->Port) and work with the board successfully. On Windows, no proper COM port shows. Not that surprising, since it’s not showing up in Windows device manager, either.

I tried something similar to the process listed on (https://learn.sparkfun.com/tutorials/us … stall-/all). Meaning, I gave the path C:\Program Files (x86)\Arduino\drivers to Windows via Device Manager->TinyUSB Serial->properties->update driver. That tutorial was written for supporting boards with FTDI chips, and it’s not clear to me whether this board does. Perhaps not, because this approach also did not work.

2

Try installing these drivers http://www.wch.cn/downloads/CH341SER_ZIP.html and/or the factory reset https://learn.sparkfun.com/tutorials/sp … bootloader and see if either of those get ya goin

3

Thanks!

I ended up going to https://github.com/NordicSemiconductor/ … t-launcher and checking out the whole repository. Turns out, what I really needed was in \build\drivers\nrf-device-lib-driver-installer. That did, indeed get me going. I hope this is helpful to someone else; I found the whole process to be almost entirely opaque as I was stumbling through it.