Datasheet

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Missing header files
Bootloader Launching
Aligned Memory Access
Floating Point Conversion
How Much RAM Available?
Storing data in FLASH
Pretty-Printing out registers
Using SPI Flash
Read & Write CircuitPython Files
Format Flash Memory
Datalogging Example
Reading and Printing Files
Full Usage Example
Accessing SPI Flash
Feather HELP!
My ItsyBitsy/Feather stopped working when I unplugged the USB!
My Feather never shows up as a COM or Serial port in the Arduino IDE
Ack! I "did something" and now when I plug in the Itsy/Feather, it doesn't show up as a device anymore so I cant
upload to it or fix it...
I can't get the Itsy/Feather USB device to show up - I get "USB Device Malfunctioning" errors!
I'm having problems with COM ports and my Itsy/Feather 32u4/M0
I don't understand why the COM port disappears, this does not happen on my Arduino UNO!
I'm trying to upload to my 32u4, getting "avrdude: butterfly_recv(): programmer is not responding" errors
I'm trying to upload to my Feather M0, and I get this error "Connecting to programmer: .avrdude: butterfly_recv():
programmer is not responding"
I'm trying to upload to my Feather and i get this error "avrdude: ser_recv(): programmer is not responding"
I attached some wings to my Feather and now I can't read the battery voltage!
What is CircuitPython?
CircuitPython is based on Python
Why would I use CircuitPython?
CircuitPython
Set up CircuitPython Quick Start!
Further Information
Installing Mu Editor
Installing Mu for Windows or Mac OS X
Installing Mu for Linux
Using Mu
Mu Packages
Creating and Editing Code
Creating Code
Editing Code
Your code changes are run as soon as the file is done saving.
1. Use an editor that writes out the file completely when you save it.
2. Eject or Sync the Drive After Writing
Oh No I Did Something Wrong and Now The CIRCUITPY Drive Doesn't Show Up!!!
Back to Editing Code...
© Adafruit Industries
https://learn.adafruit.com/adafruit-feather-m0-express-designed-for-circuit-python-
circuitpython
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