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

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CircuitPython driver for 74HC595 shift register.

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

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

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>`_.

Installing from PyPI
====================

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally `from
PyPI <https://pypi.org/project/adafruit-circuitpython-74hc595/>`_. To install for current user:

.. code-block:: shell

    pip3 install adafruit-circuitpython-74hc595

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

.. code-block:: shell

    sudo pip3 install adafruit-circuitpython-74hc595

To install in a virtual environment in your current project:

.. code-block:: shell

    mkdir project-name && cd project-name
    python3 -m venv .env
    source .env/bin/activate
    pip3 install adafruit-circuitpython-74hc595

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

.. code-block:: python

    import board
    import adafruit_74hc595
    import busio
    import digitalio
    import time

    spi = busio.SPI(board.SCK, MOSI=board.MOSI)

    latch_pin = digitalio.DigitalInOut(board.D5)
    sr = adafruit_74hc595.ShiftRegister74HC595(spi, latch_pin)

    pin1 = sr.get_pin(1)

    while True:
    pin1.value = True
    time.sleep(1)
    pin1.value = False
    time.sleep(1)

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

Contributions are welcome! Please read our `Code of Conduct
<https://github.com/adafruit/Adafruit_CircuitPython_74HC595/blob/master/CODE_OF_CONDUCT.md>`_
before contributing to help this project stay welcoming.

Documentation
=============

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>`_.