141 lines
4 KiB
ReStructuredText
141 lines
4 KiB
ReStructuredText
Introduction
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============
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.. image:: https://readthedocs.org/projects/adafruit-circuitpython-ads1x15/badge/?version=latest
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:target: https://circuitpython.readthedocs.io/projects/ads1x15/en/latest/
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:alt: Documentation Status
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.. image :: https://img.shields.io/discord/327254708534116352.svg
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:target: https://adafru.it/discord
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:alt: Discord
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.. image:: https://travis-ci.com/adafruit/Adafruit_CircuitPython_ADS1x15.svg?branch=master
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:target: https://travis-ci.com/adafruit/Adafruit_CircuitPython_ADS1x15
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:alt: Build Status
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Support for the ADS1x15 series of analog-to-digital converters. Available in 12-bit (ADS1015)
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and 16-bit (ADS1115) versions.
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Installation & Dependencies
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===========================
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This driver depends on:
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* `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_
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* `Bus Device <https://github.com/adafruit/Adafruit_CircuitPython_BusDevice>`_
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Please ensure all dependencies are available on the CircuitPython filesystem.
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This can be most easily achieved by downloading and installing
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`the Adafruit library and driver bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>`_ on
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your device.
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Installing from PyPI
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--------------------
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On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally `from
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PyPI <https://pypi.org/project/adafruit-circuitpython-ads1x15/>`_. To install for current user:
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.. code-block:: shell
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pip3 install adafruit-circuitpython-ads1x15
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To install system-wide (this may be required in some cases):
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.. code-block:: shell
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sudo pip3 install adafruit-circuitpython-ads1x15
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To install in a virtual environment in your current project:
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.. code-block:: shell
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mkdir project-name && cd project-name
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python3 -m venv .env
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source .env/bin/activate
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pip3 install adafruit-circuitpython-ads1x15
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Usage Example
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=============
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Single Ended
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------------
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.. code-block:: python
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import time
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import board
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import busio
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import adafruit_ads1x15.ads1015 as ADS
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from adafruit_ads1x15.analog_in import AnalogIn
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# Create the I2C bus
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i2c = busio.I2C(board.SCL, board.SDA)
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# Create the ADC object using the I2C bus
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ads = ADS.ADS1015(i2c)
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# Create single-ended input on channel 0
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chan = AnalogIn(ads, ADS.P0)
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# Create differential input between channel 0 and 1
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#chan = AnalogIn(ads, ADS.P0, ADS.P1)
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print("{:>5}\t{:>5}".format('raw', 'v'))
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while True:
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print("{:>5}\t{:>5.3f}".format(chan.value, chan.voltage))
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time.sleep(0.5)
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Contributing
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============
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Contributions are welcome! Please read our `Code of Conduct
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<https://github.com/adafruit/Adafruit_CircuitPython_CircuitPython_ADS1x15/blob/master/CODE_OF_CONDUCT.md>`_
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before contributing to help this project stay welcoming.
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Building locally
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================
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To build this library locally you'll need to install the
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`circuitpython-build-tools <https://github.com/adafruit/circuitpython-build-tools>`_ package.
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.. code-block:: shell
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python3 -m venv .env
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source .env/bin/activate
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pip install circuitpython-build-tools
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Once installed, make sure you are in the virtual environment:
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.. code-block:: shell
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source .env/bin/activate
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Then run the build:
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.. code-block:: shell
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circuitpython-build-bundles --filename_prefix adafruit-circuitpython-ads1x15 --library_location .
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Sphinx documentation
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--------------------
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Sphinx is used to build the documentation based on rST files and comments in the code. First,
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install dependencies (feel free to reuse the virtual environment from above):
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.. code-block:: shell
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python3 -m venv .env
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source .env/bin/activate
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pip install Sphinx sphinx-rtd-theme
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Now, once you have the virtual environment activated:
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.. code-block:: shell
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cd docs
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sphinx-build -E -W -b html . _build/html
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This will output the documentation to ``docs/_build/html``. Open the index.html in your browser to
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view them. It will also (due to -W) error out on any warning like Travis will. This is a good way to
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locally verify it will pass.
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