RF52840 Feather - Won't respond

This is a special forum devoted to educators using Adafruit and Arduino products for teaching.

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
bridge2nowhere
 
Posts: 26
Joined: Thu Mar 01, 2018 2:36 pm

RF52840 Feather - Won't respond

Post by bridge2nowhere »

My students have done another trick with our Feather.

It won't enter bootloader or be recognized at all by two different computers.

I have tried holding the UserSw while Resetting and while plugging in, nothing is working.

User avatar
mikeysklar
 
Posts: 13936
Joined: Mon Aug 01, 2016 8:10 pm

Re: RF52840 Feather - Won't respond

Post by mikeysklar »

The bootloader could be pretty jammed up.

Is there anything else connected to the board?

I assume you are using a known good cable.

If a device is showing up (even if the BOOT drive is not mounting) there is a command-line tool for updating the bootloader (adafruit-nrfutil)

https://learn.adafruit.com/introducing- ... mmand-line

If no serial device is appearing you will need a SEGGER J-LINK JTAG programmer to load a fresh bootloader.

https://www.adafruit.com/product/3571

Locked
Please be positive and constructive with your questions and comments.

Return to “For Educators”