Introduction
============

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    :target: https://circuitpython.readthedocs.io/projects/debouncer/en/latest/
    :alt: Documentation Status

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    :target: https://discord.gg/nBQh6qu
    :alt: Discord

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    :target: https://travis-ci.com/adafruit/Adafruit_CircuitPython_Debouncer
    :alt: Build Status

Debounces an arbitrary predicate function (typically created as a lambda) of 0 arguments.
The constructor also accepts a digital pin as a convienence.



Dependencies
=============
This driver depends on:

* `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_

Please ensure all dependencies are available on the CircuitPython filesystem.
This is easily achieved by downloading
`the Adafruit library and driver bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>`_.

Usage Example
=============

.. code-block:: python

    import board
    import digitalio
    from adafruit_debouncer import Debouncer

    pin = digitalio.DigitalInOut(board.D12)
    pin.direction = digitalio.Direction.INPUT
    pin.pull = digitalio.Pull.UP
    switch = Debouncer(pin)

    while True:
        switch.update()
        if switch.fell:
            print('Just pressed')
        if switch.rose:
            print('Just released')
        if switch.value:
            print('not pressed')
        else:
            print('pressed')


Contributing
============

Contributions are welcome! Please read our `Code of Conduct
<https://github.com/adafruit/Adafruit_CircuitPython_debouncer/blob/master/CODE_OF_CONDUCT.md>`_
before contributing to help this project stay welcoming.

Building locally
================

Zip release files
-----------------

To build this library locally you'll need to install the
`circuitpython-build-tools <https://github.com/adafruit/circuitpython-build-tools>`_ package.

.. code-block:: shell

    python3 -m venv .env
    source .env/bin/activate
    pip install circuitpython-build-tools

Once installed, make sure you are in the virtual environment:

.. code-block:: shell

    source .env/bin/activate

Then run the build:

.. code-block:: shell

    circuitpython-build-bundles --filename_prefix adafruit-circuitpython-debouncer --library_location .

Sphinx documentation
-----------------------

Sphinx is used to build the documentation based on rST files and comments in the code. First,
install dependencies (feel free to reuse the virtual environment from above):

.. code-block:: shell

    python3 -m venv .env
    source .env/bin/activate
    pip install Sphinx sphinx-rtd-theme

Now, once you have the virtual environment activated:

.. code-block:: shell

    cd docs
    sphinx-build -E -W -b html . _build/html

This will output the documentation to ``docs/_build/html``. Open the index.html in your browser to
view them. It will also (due to -W) error out on any warning like Travis will. This is a good way to
locally verify it will pass.