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


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PIO implementation of CircuitPython UART API


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

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

Please ensure all dependencies are available on the CircuitPython filesystem.
This is easily achieved by downloading
`the Adafruit library and driver bundle <https://circuitpython.org/libraries>`_
or individual libraries can be installed using
`circup <https://github.com/adafruit/circup>`_.

Works with the Raspberry Pi RP2040 Pico family.

`Purchase one from the Adafruit shop <https://www.adafruit.com/category/875>`_.

Installing from PyPI
=====================
.. note:: This library is not available on PyPI yet. Install documentation is included
   as a standard element. Stay tuned for PyPI availability!

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally `from
PyPI <https://pypi.org/project/adafruit-circuitpython-pio-uart/>`_.
To install for current user:

.. code-block:: shell

    pip3 install adafruit-circuitpython-pio-uart

To install system-wide (this may be required in some cases):

.. code-block:: shell

    sudo pip3 install adafruit-circuitpython-pio-uart

To install in a virtual environment in your current project:

.. code-block:: shell

    mkdir project-name && cd project-name
    python3 -m venv .venv
    source .env/bin/activate
    pip3 install adafruit-circuitpython-pio-uart

Installing to a Connected CircuitPython Device with Circup
==========================================================

Make sure that you have ``circup`` installed in your Python environment.
Install it with the following command if necessary:

.. code-block:: shell

    pip3 install circup

With ``circup`` installed and your CircuitPython device connected use the
following command to install:

.. code-block:: shell

    circup install adafruit_pio_uart

Or the following command to update an existing version:

.. code-block:: shell

    circup update

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

.. code-block:: python

    import board
    import adafruit_pio_uart

    uart = adafruit_pio_uart.UART(board.TX, board.RX)

    uart.write(b"\x00")
    print(uart.read(1))


Documentation
=============
API documentation for this library can be found on `Read the Docs <https://docs.circuitpython.org/projects/pio_uart/en/latest/>`_.

For information on building library documentation, please check out
`this guide <https://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1>`_.

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

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