circuitpython/ports/windows/README.md

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This is the experimental, community-supported Windows port of MicroPython.
It is based on Unix port, and expected to remain so.
The port requires additional testing, debugging, and patches. Please
consider to contribute.
All gcc-based builds use the gcc compiler from [Mingw-w64](mingw-w64.org),
which is the advancement of the original mingw project. The latter is
getting obsolete and is not actively supported by MicroPython.
Build instruction assume you're in the ports/windows directory.
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Building on Debian/Ubuntu Linux system
---------------------------------------
sudo apt-get install python3 build-essential gcc-mingw-w64
make -C ../../mpy-cross
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make CROSS_COMPILE=i686-w64-mingw32-
Building under Cygwin
---------------------
Install Cygwin, then install following packages using Cygwin's setup.exe:
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* mingw64-i686-gcc-core
* mingw64-x86_64-gcc-core
* make
Also install the python3 package, or install Python globally for Windows (see below).
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Build using:
make -C ../../mpy-cross CROSS_COMPILE=i686-w64-mingw32-
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make CROSS_COMPILE=i686-w64-mingw32-
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Or for 64bit:
make -C ../../mpy-cross CROSS_COMPILE=x86_64-w64-mingw32-
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make CROSS_COMPILE=x86_64-w64-mingw32-
Building under MSYS2
--------------------
Install MSYS2 from http://repo.msys2.org/distrib, start the msys2.exe shell and
install the build tools:
pacman -Syuu
pacman -S make mingw-w64-x86_64-gcc pkg-config python3
Start the mingw64.exe shell and build:
make -C ../../mpy-cross STRIP=echo SIZE=echo
make
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Building using MS Visual Studio 2013 (or higher)
------------------------------------------------
Install Python. There are several ways to do this, for example: download and install the
latest Python 3 release from https://www.python.org/downloads/windows or from
https://docs.conda.io/en/latest/miniconda.html,
or open the Microsoft Store app and search for Python and install it.
Install Visual Studio and the C++ toolset (for recent versions: install
the free Visual Studio Community edition and the *Desktop development with C++* workload).
In the IDE, open `micropython-cross.vcxproj` and `micropython.vcxproj` and build.
To build from the command line:
msbuild ../../mpy-cross/mpy-cross.vcxproj
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msbuild micropython.vcxproj
__Stack usage__
The msvc compiler is quite stack-hungry which might result in a "maximum recursion depth exceeded"
RuntimeError for code with lots of nested function calls.
There are several ways to deal with this:
- increase the threshold used for detection by altering the argument to `mp_stack_set_limit` in `ports/unix/main.c`
- disable detection all together by setting `MICROPY_STACK_CHECK` to "0" in `ports/windows/mpconfigport.h`
- disable the /GL compiler flag by setting `WholeProgramOptimization` to "false"
See [issue 2927](https://github.com/micropython/micropython/issues/2927) for more information.
Running the tests
-----------------
This is similar for all ports:
cd ../../tests
python ./run-tests
Though when running on Cygwin and using Cygwin's Python installation you'll need:
python3 ./run-tests
Depending on the combination of platform and Python version used it might be
needed to first set the MICROPY_MICROPYTHON environment variable to
the full path of micropython.exe.
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Running on Linux using Wine
---------------------------
The default build (MICROPY_USE_READLINE=1) uses extended Windows console
functions and thus should be ran using the `wineconsole` tool. Depending
on the Wine build configuration, you may also want to select the curses
backend which has the look&feel of a standard Unix console:
wineconsole --backend=curses ./micropython.exe
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For more info, see https://www.winehq.org/docs/wineusr-guide/cui-programs .
If built without line editing and history capabilities
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(MICROPY_USE_READLINE=0), the resulting binary can be run using the standard
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`wine` tool.