The MicroPython repository is divided into a number of directories, each with its own function. Some of them include:
The user documentation for all ports lives in the docs directory, with some
example code in the examples directory. The logo directory contains the
MicroPython logo in various formats.
All tests live in the tests directory.
The py directory contains the bulk of code for the compiler, runtime
environment and core library of MicroPython. This is where we will be looking
for API functions and macros.
The directories such as esp8266, cc3200, pic16bit, teensy,
stmhal, bare-arm, qemu-arm, unix and windows contain code
and tools specific to particular ports of MicroPython. If you are working on a
feature to be added for a specific hardware, this is probably the best place to
put your files.
The minimal directory contains the minimum of files that a new port needs.
You can use this as a template for starting new ports of MicroPython.
The extmod directory contains source of MicroPython modules that may are
not part of the core library, but are useful for multiple ports. The
drivers directory has code for libraries that communicate with various
additional hardware, such as displays or sensors.
The tools directory contains various tools useful for working with
MicroPython. The mpy-cross directory has code for the MicroPython
cross-compiler, which can be used to generate frozen bytecode modules.