MicroPython ported to Infineon MCUs
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Latest commit 214cffb Jul 12, 2016 Lilia Schwab xmc: Use USB instead of UART for REPL.
Use USB implementation from LUFA library.
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bare-arm lib/utils/pyexec: Condition-out GC calls from pyexec. Apr 19, 2016
cc3200 stmhal, cc3200: Change i2c.scan() method to scan addresses 0x08-0x77. May 2, 2016
docs docs: Bump version to 1.8.1. Jun 3, 2016
drivers drivers/display/ssd1306: update SSD1306_SPI to work with new API Jun 3, 2016
esp8266 esp8266/modpybrtc: Handle RTC overflow. Jun 3, 2016
examples examples/network/: Use getaddrinfo() result in easy way. May 2, 2016
extmod extmod/machine: Add MICROPY_PY_MACHINE_PULSE config for time_pulse_us. May 31, 2016
lib lib/libm: Fix some "bugs" preventing a clean compile with XMC port. Jun 30, 2016
logo logo: Change line endings in FONT-LICENSE.txt from CRLF to LF. Apr 16, 2015
minimal minimal: For frozen bytecode generation, add dependency of qstr file. Apr 16, 2016
mpy-cross mpy-cross: Add -s option to specify the embedded source filename. May 23, 2016
pic16bit py: Add rules for automated extraction of qstrs from sources. Apr 16, 2016
py extmod/machine: Add MICROPY_PY_MACHINE_PULSE config for time_pulse_us. May 31, 2016
qemu-arm qemu-arm: Enable builtin override feature, and enable more tests. Mar 15, 2016
stmhal stmhal/uart.c: Fix wrong baudrate calculation for stm32l4 series. Jun 3, 2016
teensy cc3200, stmhal, teensy: Use pyhelp_print_obj function. Apr 25, 2016
tests tests/pyb/rtc: Make RTC test on pyboard more reliable by calling init(). Jun 3, 2016
tools tools: Upgrade upip to 0.7. May 27, 2016
unix extmod/vfs_fat.c: Add vfs.stat(). May 31, 2016
windows windows: Enable multi-processor compilation for msvc May 8, 2016
xmc xmc: Use USB instead of UART for REPL. Jul 12, 2016
.gitattributes Add .gitattributes file to force text line endings to LF. Apr 16, 2015
.gitignore msvc: Allow overriding of build options with custom file Apr 30, 2015
.gitmodules lib/lwip: Add LwIP stack as a submodule in the library directory Oct 22, 2015
.travis.yml .travis.yml: Install gcc-arm-none-eabi with --force-yes for now. May 26, 2016
ACKNOWLEDGEMENTS ACKNOWLEDGEMENTS: Add list of 842 backers from the ESP8266 campaign. Apr 21, 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: "quick build": Use "make axtls" after all. May 28, 2016

README.md

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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. 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 Micro Python board, 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 MicroPython board with an STM32F405RG (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.