Micropython Rocky

micropython and OpenMV port to NXP MCUs
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The MicroPython and OpenMV port to NXP MCUs

MicroPython Logo project banner

This is project is cloned from 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/await keywords 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 a subset of Python 3 functionality is implemented for the data types and modules.

MicroPython can execute scripts in textual source form or from precompiled bytecode, in both cases either from an on-device filesystem or "frozen" into the MicroPython executable.

See the repository 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.
  • mpy-cross/ -- the MicroPython cross-compiler which is used to turn scripts into precompiled bytecode.
  • ports/unix/ -- a version of MicroPython that runs on Unix.
  • ports/nxp_rt1050_60/ -- a version of MicroPython that runs on the imxrtevk105x and similar  i.mx rt1050/60 boards (using NXP's MCUXpresso SDK drivers). OpenMV is also ported to i.MX RT1050/60 devices.
  • ports/nxp_lpc546/ -- a version of MicroPython that runs on the LPCXPresso54608 board and similar  lpc54608 boards (using NXP's MCUXpresso SDK drivers).
  • tests/ -- test framework and test scripts.
  • docs/ -- user documentation in Sphinx reStructuredText format. Rendered HTML documentation is available at http://docs.micropython.org (be sure to select needed board/port at the bottom left corner).

Additional components:

  • ports/bare-arm/ -- a bare minimum version of MicroPython for ARM MCUs. Used mostly to control code size.
  • ports/teensy/ -- a version of MicroPython that runs on the Teensy 3.1 (preliminary but functional).
  • ports/pic16bit/ -- a version of MicroPython for 16-bit PIC microcontrollers.
  • ports/cc3200/ -- a version of MicroPython that runs on the CC3200 from TI.
  • ports/esp8266/ -- an experimental port for ESP8266 WiFi modules.
  • extmod/ -- additional (non-core) modules implemented in C.
  • 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, gcc, 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):

$ git submodule update --init
$ cd ports/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 MicroPython ports may require some dependencies installed.

For Unix port, libffi library and pkg-config tool are required. On 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. This may be required to enable extra features or capabilities, and in recent versions of MicroPython, these may be enabled by default. To build these additional dependencies, first fetch git submodules for them:

$ git submodule update --init

Use the same command to get the latest versions of dependencies, as they are updated from time to time. After that, in the port directory (e.g. ports/unix/), 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 enable/disable use of dependencies, edit ports/unix/mpconfigport.mk file, which has inline descriptions of the options. For example, to build SSL module (required for upip tool described above, and so enabled by dfeault), MICROPY_PY_USSL should be set to 1.

For some ports, building required dependences is transparent, and happens automatically. They still need to be fetched with the git submodule command above.

The i.mx RT105x and LPC54608 version

The "rt1050_60" port supports GCC toolchain (as mpy official) and KEIL. To build under keil, just open KEIL project in "prj_keil_" folder. To build under GCC, requires an ARM compiler, arm-none-eabi-gcc, and associated bin-utils. For those using Arch Linux, you need arm-none-eabi-binutils, arm-none-eabi-gcc and arm-none-eabi-newlib packages. Otherwise, try here: https://launchpad.net/gcc-arm-embedded

To build:

$ git submodule update --init
$ cd ports/nxp_rt105
$ make


MicroPython and OpenMV are open-source projects and welcome contributions. To be productive, please be sure to follow the Contributors' Guidelines and the Code Conventions. Note that MicroPython is licenced under the MIT license, and all contributions should follow this license.

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