MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems
C C++ Python Objective-C HTML Makefile Other
Failed to load latest commit information.
bare-arm py: Be more specific with MP_DECLARE_CONST_FUN_OBJ macros. Oct 21, 2016
cc3200 cc3200/modwlan: Add network.WLAN.print_ver() diagnostic function. Jan 7, 2017
docs docs: Fix some minor spelling mistakes. Jan 18, 2017
drivers drivers: Fix some minor spelling mistakes. Jan 18, 2017
esp8266 esp8266/modules/flashbdev: Change RESERVED_SECS to 0. Jan 6, 2017
examples examples/hwapi/hwconfig_console: Don't alloc memory in value(). Dec 23, 2016
extmod extmod/modframebuf: optimize fill_rect subroutine call Jan 8, 2017
lib lib/utils/interrupt_char: Use core-provided mp_kbd_exception if enabled. Dec 15, 2016
logo logo/1bit-logo A black & white version of the logo Aug 2, 2016
minimal minimal/Makefile: Split rule for firmware.bin generation. Oct 22, 2016
mpy-cross mpy-cross: Get compiling after recent persistent code refactors. Nov 16, 2016
pic16bit py: Be more specific with MP_DECLARE_CONST_FUN_OBJ macros. Oct 21, 2016
py py/objint_mpz: Refactor switch-statement to remove unreachable default. Jan 19, 2017
qemu-arm qemu-arm: Enable software floating point support, and float tests. Nov 3, 2016
stmhal stmhal: Implement SNAK/CNAK mechanism for USB HID receive. Jan 19, 2017
teensy all: Consistently update signatures of .make_new and .call methods. Jan 4, 2017
tests tests/misc/non_compliant: Add test for inability to assign func attrs. Jan 19, 2017
tools tools/mpy-tool.py: Add support for OPT_CACHE_MAP_LOOKUP_IN_BYTECODE. Jan 5, 2017
unix tests: Improve frozen import test coverage. Jan 16, 2017
windows windows: Enable READER_POSIX to get access to lexer_new_from_file. Nov 16, 2016
zephyr zephyr: Enable slice subscription. Dec 18, 2016
.gitattributes Add .gitattributes file to force text line endings to LF. Apr 16, 2015
.gitignore .gitignore: Add *.pyc, because Python 2 doesn't use __pycache__. Aug 29, 2016
.gitmodules lib/berkeley-db-1.xx: Add Berkeley DB 1.85 as a submodule. Jun 14, 2016
.travis.yml travis: Include persistent bytecode with floats in coverage tests. Dec 22, 2016
ACKNOWLEDGEMENTS ACKNOWLEDGEMENTS: Change backer 905 info, replace city with name. Oct 22, 2016
CODECONVENTIONS.md CODECONVENTIONS.md: Describe git commit messages conventions. May 7, 2016
CONTRIBUTING.md CONTRIBUTING.md: Link to contrib guidelines and code conventions. May 3, 2015
LICENSE Add license header to (almost) all files. May 3, 2014
README.md README: "MicroPython board" is much more commonly known as PyBoard. Oct 21, 2016


Build Status Coverage Status

The MicroPython project

MicroPython Logo

This is the MicroPython project, which aims to put an implementation of Python 3.x on microcontrollers and small embedded systems. You can find the official website at micropython.org.

WARNING: this project is in beta stage and is subject to changes of the code-base, including project-wide name changes and API changes.

MicroPython implements the entire Python 3.4 syntax (including exceptions, "with", "yield from", etc., and additionally "async" keyword from Python 3.5). The following core datatypes are provided: str (including basic Unicode support), bytes, bytearray, tuple, list, dict, set, frozenset, array.array, collections.namedtuple, classes and instances. Builtin modules include sys, time, and struct, etc. Select ports have support for _thread module (multithreading). Note that only subset of Python 3.4 functionality implemented for the data types and modules.

See the repository www.github.com/micropython/pyboard for the MicroPython board (PyBoard), the officially supported reference electronic circuit board.

Major components in this repository:

  • py/ -- the core Python implementation, including compiler, runtime, and core library.
  • unix/ -- a version of MicroPython that runs on Unix.
  • stmhal/ -- a version of MicroPython that runs on the PyBoard and similar STM32 boards (using ST's Cube HAL drivers).
  • minimal/ -- a minimal MicroPython port. Start with this if you want to port MicroPython to another microcontroller.
  • tests/ -- test framework and test scripts.
  • docs/ -- user documentation in Sphinx reStructuredText format.

Additional components:

  • bare-arm/ -- a bare minimum version of MicroPython for ARM MCUs. Used mostly to control code size.
  • teensy/ -- a version of MicroPython that runs on the Teensy 3.1 (preliminary but functional).
  • pic16bit/ -- a version of MicroPython for 16-bit PIC microcontrollers.
  • cc3200/ -- a version of MicroPython that runs on the CC3200 from TI.
  • esp8266/ -- an experimental port for ESP8266 WiFi modules.
  • tools/ -- various tools, including the pyboard.py module.
  • examples/ -- a few example Python scripts.

The subdirectories above may include READMEs with additional info.

"make" is used to build the components, or "gmake" on BSD-based systems. You will also need bash and Python (at least 2.7 or 3.3).

The Unix version

The "unix" port requires a standard Unix environment with gcc and GNU make. x86 and x64 architectures are supported (i.e. x86 32- and 64-bit), as well as ARM and MIPS. Making full-featured port to another architecture requires writing some assembly code for the exception handling and garbage collection. Alternatively, fallback implementation based on setjmp/longjmp can be used.

To build (see section below for required dependencies):

$ cd unix
$ make axtls
$ make

Then to give it a try:

$ ./micropython
>>> list(5 * x + y for x in range(10) for y in [4, 2, 1])

Use CTRL-D (i.e. EOF) to exit the shell. Learn about command-line options (in particular, how to increase heap size which may be needed for larger applications):

$ ./micropython --help

Run complete testsuite:

$ make test

Unix version comes with a builtin package manager called upip, e.g.:

$ ./micropython -m upip install micropython-pystone
$ ./micropython -m pystone

Browse available modules on PyPI. Standard library modules come from micropython-lib project.

External dependencies

Building Unix version requires some dependencies installed. For Debian/Ubuntu/Mint derivative Linux distros, install build-essential (includes toolchain and make), libffi-dev, and pkg-config packages.

Other dependencies can be built together with MicroPython. Oftentimes, you need to do this to enable extra features or capabilities. To build these additional dependencies, first fetch git submodules for them:

$ git submodule update --init

Use this same command to get the latest versions of dependencies, as they are updated from time to time. After that, in unix/ dir, execute:

$ make deplibs

This will build all available dependencies (regardless whether they are used or not). If you intend to build MicroPython with additional options (like cross-compiling), the same set of options should be passed to make deplibs. To actually enabled use of dependencies, edit unix/mpconfigport.mk file, which has inline descriptions of the options. For example, to build SSL module (required for upip tool described above), set MICROPY_PY_USSL to 1.

In unix/mpconfigport.mk, you can also disable some dependencies enabled by default, like FFI support, which requires libffi development files to be installed.

The STM version

The "stmhal" port requires an ARM compiler, arm-none-eabi-gcc, and associated bin-utils. For those using Arch Linux, you need arm-none-eabi-binutils and arm-none-eabi-gcc packages. Otherwise, try here: https://launchpad.net/gcc-arm-embedded

To build:

$ cd stmhal
$ make

You then need to get your board into DFU mode. On the pyboard, connect the 3V3 pin to the P1/DFU pin with a wire (on PYBv1.0 they are next to each other on the bottom left of the board, second row from the bottom).

Then to flash the code via USB DFU to your device:

$ make deploy

This will use the included tools/pydfu.py script. If flashing the firmware does not work it may be because you don't have the correct permissions, and need to use sudo make deploy. See the README.md file in the stmhal/ directory for further details.