How to Program SAMD Bootloaders

by Brent Rubell

published January 25, 2019, last updated January 25, 2019

posted in Feather/ Feather Boards Arduino Compatibles/ Adafruit METRO Programming/ MicroPython / CircuitPython

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39

Intermediate

Project guide

Metro M0/M4 Wiring

The Adafruit Metro M0 and M4 have a socket for connecting to a SWD cable built-in - you can connect (and disconnect) a SWD cable quickly.

Remove the small plastic cap cap from the SWD socket on the Metro.

Then, connect the SWD cable from the J-Link to the Metro.

Once the Metro is wired up, plug the J-Link into a USB port on your computer and wait for the status indicator LED to turn green.

Then, plug a USB cable into the Metro, this is required!

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