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Feather M4 Express- no serial port/drive
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Feather M4 Express- no serial port/drive

by kamonmark on Sun Oct 17, 2021 3:47 am

Hello,
I've been working with the feather M4 express for the last several months. One of my units will run its latest circuit python code, but when plugged into my Mac(OS 11.4) I can't see a serial port or the unit's drive. Other units work as expected, showing serial port and drive.

When I double-reset on the unit, the RGB led goes solid red and the pin #13 LED fades on/off quickly.

Are there any recovery methods that don't involved external hardware? (I don't have a JTAg programmer)

kamonmark
 
Posts: 2
Joined: Sun Oct 17, 2021 3:37 am

Re: Feather M4 Express- no serial port/drive

by kamonmark on Sun Oct 17, 2021 5:17 am

Aaaaand I figured it out. The handy diagram here that I just came across told me the lights were from no USB.

https://learn.adafruit.com/adafruit-fea ... er-details

In some freak accident I have a solder splatter between a data and power pin on the USB connector make a bridge. Removed that and everything's back to normal. Thanks!
IMG_8470.JPG
IMG_8470.JPG (124.53 KiB) Viewed 57 times

kamonmark
 
Posts: 2
Joined: Sun Oct 17, 2021 3:37 am

Please be positive and constructive with your questions and comments.