Using The Bossa Bootloader - Adafruit Feather M4 Express Manual

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You may get an alert from the OS that the file is being copied without it's properties. You can just click Yes

You may also get get a complaint that the drive was ejected without warning. Don't worry about this. The drive only

ejects once the bootloader has verified and completed the process of writing the new code

Using the BOSSA Bootloader

As mentioned before, the bootloader is also compatible with BOSSA, which is the standard method of updating boards

when in the Arduino IDE. It is a command-line tool that can be used in any operating system. We won't cover the full

use of the bossac tool, suffice to say it can do quite a bit! More information is available at

ShumaTech

(https://adafru.it/vQa).

Windows 7 Drivers

If you are running Windows 7 (or, goodness, something earlier?) You will need a Serial Port driver file. Windows 10

users do not need this so skip this step.

You can download our full driver package here:

https://adafru.it/AB0

https://learn.adafruit.com/adafruit-feather-m4-express-atsamd51

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