micropython/README.md

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The Micro Python project
========================
<p align="center">
<img src="https://raw2.github.com/micropython/micropython/master/logo/upython-with-micro.jpg" alt="MicroPython Logo"/>
</p>
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This is the Micro Python project, which aims to put an implementation
of Python 3.x on a microcontroller.
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WARNING: this project is in its early stages and is subject to large
changes of the code-base, including project-wide name changes and API
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changes.
See the repository www.github.com/micropython/pyboard for the Micro
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Python board.
Major components in this repository:
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- py/ -- the core Python implementation, including compiler and runtime.
- unix/ -- a version of Micro Python that runs on Unix.
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- stmhal/ -- a version of Micro Python that runs on the Micro Python board
with an STM32F405RG (using ST's new Cube HAL drivers).
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- teensy/ -- a version of Micro Python that runs on the Teensy 3.1
(preliminary but functional).
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Additional components:
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- bare-arm/ -- a bare minimum version of Micro Python for ARM MCUs. Start
with this if you want to port Micro Python to another microcontroller.
- stm/ -- obsolete version of Micro Python for the Micro Python board
that uses ST's old peripheral drivers.
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- unix-cpy/ -- a version of Micro Python that outputs bytecode (for testing).
- tests/ -- test framework and test scripts.
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- tools/ -- various tools, including the pyboard.py module.
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- examples/ -- a few example Python scripts.
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"make" is used to build the components, or "gmake" on BSD-based systems.
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You will also need bash and Python (at least 2.7 or 3.3).
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The Unix version
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----------------
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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 ARMv7. Porting to other architectures require writing some assembly code
for the exception handling.
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To build:
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$ cd unix
$ make
Then to test it:
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$ ./micropython
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>>> list(5 * x + y for x in range(10) for y in [4, 2, 1])
Debian/Ubuntu/Mint derivative Linux distros will require build-essentials and
libreadline-dev packages installed. To build FFI (Foreign Function Interface)
module, libffi-dev package is required. If you have problems with some
dependencies, they can be disabled in unix/mpconfigport.mk .
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The STM version
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---------------
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The "stmhal" port requires an ARM compiler, arm-none-eabi-gcc, and associated
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bin-utils. For those using Arch Linux, you need arm-none-eabi-binutils and
arm-none-eabi-gcc packages from the AUR. Otherwise, try here:
https://launchpad.net/gcc-arm-embedded
To build:
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$ cd stmhal
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$ make
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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:
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$ dfu-util -a 0 -D build/flash.dfu
You will need the dfu-util program, on Arch Linux it's dfu-util-git in the AUR.