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This is an open source derivative of MicroPython for use on educational development boards designed and sold by Adafruit including the Arduino Zero, Adafruit Feather M0 Basic, Adafruit Feather HUZZAH and Adafruit Feather M0 Bluefruit LE.
As a MicroPython derivative, this implements Python 3.x on microcontrollers such as the SAMD21 and ESP8266.
This project is in beta. Most APIs should be stable going forward.
See CONTRIBUTING.md for full guidelines but please be aware that by contributing to this project you are agreeing to the Code of Conduct. Contributors who follow the Code of Conduct are welcome to submit pull requests and they will be promptly reviewed by project admins. Please join the Gitter chat too.
Differences from MicroPython
- Port for Atmel SAMD21 (Commonly known as M0 in product names.)
machineAPI on Atmel SAMD21 port.
- Only supports Atmel SAMD21 and ESP8266 ports.
- Unified hardware API:
bitbangio(Only available on atmel-samd21 and ESP8266 currently.)
- Tracks MicroPython's releases (not master).
- No module aliasing. (
utimeare not available as
- Modules with a CPython counterpart, such as
time, are strict subsets of their CPython version. Therefore, code from CircuitPython is runnable on CPython but not necessarily the reverse.
- tick count is available as
osonly available as
- atmel-samd21 features
- RGB status LED
- Auto-reset after file write over mass storage. (Disable with
- Wait state after boot and main run, before REPL.
- Main is one of these: code.txt, code.py, main.py, main.txt
- Boot is one of these: settings.txt, settings.py, boot.py, boot.txt
Here is an overview of the top-level directories.
The core code of MicroPython is shared amongst ports including CircuitPython:
docsHigh level user documentation in Sphinx reStructuredText format.
driversExternal device drivers written in Python.
examplesA few example Python scripts.
extmodShared C code used in multiple ports' modules.
libShared core C code including externally developed libraries such as FATFS.
logoThe MicroPython logo.
mpy-crossA cross compiler that converts Python files to byte code prior to being run in MicroPython. Useful for reducing library size.
pyCore Python implementation, including compiler, runtime, and core library.
shared-bindingsShared definition of Python modules, their docs and backing C APIs. Ports must implement the C API to support the corresponding module.
testsTest framework and test scripts.
toolsVarious tools, including the pyboard.py module.
Ports include the code unique to a microcontroller line and also variations based on the board.
atmel-samdSupport for SAMD21 based boards such as Arduino Zero, Adafruit Feather M0 Basic, and Adafruit Feather M0 Bluefruit LE.
bare-armA bare minimum version of MicroPython for ARM MCUs.
cc3200Support for boards based CC3200 from TI such as the WiPy 1.0.
esp8266Support for boards based on ESP8266 WiFi modules such as the Adafruit Feather HUZZAH.
minimalA minimal MicroPython port. Start with this if you want to port MicroPython to another microcontroller.
pic16bitSupport for 16-bit PIC microcontrollers.
qemu-armSupport for ARM emulation through QEMU.
stmhalSupport for boards based on STM32 microcontrollers including the MicroPython flagship PyBoard.
teensySupport for the Teensy line of boards such as the Teensy 3.1.
unixSupport for UNIX.
windowsSupport for Windows.
zephyrSupport for Zephyr, a real-time operating system by the Linux Foundation.
CircuitPython only maintains the
esp8266 ports. The rest are here to maintain compatibility with the MicroPython parent project.