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micropython/mpy-cross/README.md
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MicroPython cross compiler | |
========================== | |
This directory contains the MicroPython cross compiler, which runs under any | |
Unix-like system and compiles .py scripts into .mpy files. | |
Build it as usual: | |
$ make | |
The compiler is called `mpy-cross`. Invoke it as: | |
$ ./mpy-cross foo.py | |
This will create a file foo.mpy which can then be copied to a place accessible | |
by the target MicroPython runtime (eg onto a pyboard's filesystem), and then | |
imported like any other Python module using `import foo`. | |
Different target runtimes may require a different format of the compiled | |
bytecode, and such options can be passed to the cross compiler. | |
If the Python code contains `@native` or `@viper` annotations, then you must | |
specify `-march` to match the target architecture. | |
Run `./mpy-cross -h` to get a full list of options. | |
The optimisation level is 0 by default. Optimisation levels are detailed in | |
https://docs.micropython.org/en/latest/library/micropython.html#micropython.opt_level |