After downloading a program to a ATSAMD21G rev3 Dev Board, windows 10 gives me a notification that it can not find the driver for the board and the “Port” entry is grayed out under “Tools”. I’ve tried with 2 new boards - same result. I’ve downloaded and executed the program on an older ATSAMD21 rev3 Dev Board - works fine. I’m stumped; sure would appreciate any suggestions. Thanks!!
It sounds like you’re experiencing a device conflict from Windows - try installing the drivers here https://learn.sparkfun.com/tutorials/sa … -need-them and see if the port shows up after? Also, be sure to run the program as admin, make sure Windows defender isn’t interfering, etc.
If none of that works, see if you can get the device to appear on an alternate PC/laptop
Thanks for responding! I tried downloading the driver (Sparkfun_SAMD21_Driver_111115) on my Win 10 computer - got the message that it’s already installed and the computer continues to say device not recognized. Tried connecting the board to another Win 10 computer - same result (device not recognized). Finally, installed Win7 driver (sparffun_drivers_1.0.5.1) on an older Win7 computer with same result (device not recognized). When I first connected a new board to my computer, everything was fine suggesting that the board USB interface was OK. However, after downloading my Ardunio program, my compter no longer recognizes the board as a device. I don’t know details on the USB protocol - is it possible that in downloading my program I overwrote some core code in the SAMD21G processor? Can the problem be corrected (I now have 2 new boards that are not usable)? Really appreciate your help!
Give these drivers a try:
https://github.com/sparkfun/samd_window … .0.5.3.exe
Also, are you able to upload if you double click the reset button to force the board into bootloader mode?