{"id":15925820,"url":"https://github.com/gpongelli/circuitpython_gpio_expander","last_synced_at":"2026-05-08T19:31:31.054Z","repository":{"id":62153244,"uuid":"557910080","full_name":"gpongelli/CircuitPython_gpio_expander","owner":"gpongelli","description":"CircuitPython helper library for gpio expanders (Texas Instrument PCA95xx and TCA95xx 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image:: https://readthedocs.org/projects/circuitpython-gpio-expander/badge/?version=latest\n    :target: https://circuitpython-gpio-expander.readthedocs.io/\n    :alt: Documentation Status\n\n\n\n.. image:: https://img.shields.io/discord/327254708534116352.svg\n    :target: https://adafru.it/discord\n    :alt: Discord\n\n\n.. image:: https://github.com/gpongelli/CircuitPython_gpio_expander/workflows/Build%20CI/badge.svg\n    :target: https://github.com/gpongelli/CircuitPython_gpio_expander/actions\n    :alt: Build Status\n\n\n.. image:: https://img.shields.io/badge/code%20style-black-000000.svg\n    :target: https://github.com/psf/black\n    :alt: Code Style: Black\n\nCircuitPython helper library for gpio expanders (Texas Instrument PCA95xx and TCA95xx chips).\n\n\nDependencies\n=============\nThis driver depends on:\n\n* `Adafruit CircuitPython \u003chttps://github.com/adafruit/circuitpython\u003e`_\n* `Bus Device \u003chttps://github.com/adafruit/Adafruit_CircuitPython_BusDevice\u003e`_\n* `Register \u003chttps://github.com/adafruit/Adafruit_CircuitPython_Register\u003e`_\n\nPlease ensure all dependencies are available on the CircuitPython filesystem.\nThis is easily achieved by downloading\n`the Adafruit library and driver bundle \u003chttps://circuitpython.org/libraries\u003e`_\nor individual libraries can be installed using\n`circup \u003chttps://github.com/adafruit/circup\u003e`_.\n\nInstalling to a Connected CircuitPython Device with Circup\n==========================================================\n\nMake sure that you have ``circup`` installed in your Python environment.\nInstall it with the following command if necessary:\n\n.. code-block:: shell\n\n    pip3 install circup\n\nWith ``circup`` installed and your CircuitPython device connected use the\nfollowing command to install:\n\n.. code-block:: shell\n\n    circup install gpio_expander\n\nOr the following command to update an existing version:\n\n.. code-block:: shell\n\n    circup update\n\nUsage Example\n=============\n\n.. code-block:: python\n\n    import board\n\n    from gpio_expander import PCA9555, PCA9534\n\n    #######################\n    # 16 bit I2C expander #\n    #######################\n    _pca9555 = PCA9555(board.I2C(), 0x20)\n\n    # print input 0 bit 0 value; datasheet bit field's name has underscore in place of dot for 16 bit expander\n    print(_pca9555.I0_0)\n\n    # configure an output port and set its value\n    _pca9555.C1_3 = 0\n    _pca9555.O1_3 = 0\n\n    # print entire configuration registry\n    print(_pca9555.configuration_ports)\n\nDocumentation\n=============\nAPI documentation for this library can be found on `Read the Docs \u003chttps://circuitpython-gpio-expander.readthedocs.io/\u003e`_.\n\nFor information on building library documentation, please check out\n`this guide \u003chttps://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1\u003e`_.\n\nContributing\n============\n\nContributions are welcome! Please read our `Code of Conduct\n\u003chttps://github.com/gpongelli/CircuitPython_gpio_expander/blob/HEAD/CODE_OF_CONDUCT.md\u003e`_\nbefore contributing to help this project stay welcoming.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fgpongelli%2Fcircuitpython_gpio_expander","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fgpongelli%2Fcircuitpython_gpio_expander","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fgpongelli%2Fcircuitpython_gpio_expander/lists"}