Initial driver version (#1)

Thanks @caternuson!
This commit is contained in:
Carter Nelson 2017-11-08 17:15:00 -08:00 committed by Scott Shawcroft
parent 6d6ae46a2e
commit e731810cfd
11 changed files with 753 additions and 1 deletions

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# Contributor Covenant Code of Conduct
## Our Pledge
In the interest of fostering an open and welcoming environment, we as
contributors and maintainers pledge to making participation in our project and
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## Our Standards
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include:
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## Our Responsibilities
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behavior and are expected to take appropriate and fair corrective action in
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Project maintainers have the right and responsibility to remove, edit, or
reject comments, commits, code, wiki edits, issues, and other contributions
that are not aligned to this Code of Conduct, or to ban temporarily or
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## Scope
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## Attribution
This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
available at [http://contributor-covenant.org/version/1/4][version]
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The MIT License (MIT)
Copyright (c) 2017 Carter Nelson for Adafruit Industries
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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just a blank repo to get the ball rolling...

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Introduction
============
.. image:: https://readthedocs.org/projects/adafruit-circuitpython-CircuitPython_ADS1x15/badge/?version=latest
:target: https://circuitpython.readthedocs.io/projects/CircuitPython_ADS1x15/en/latest/
:alt: Documentation Status
.. image :: https://badges.gitter.im/adafruit/circuitpython.svg
:target: https://gitter.im/adafruit/circuitpython?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge
:alt: Gitter
Support for the ADS1x15 series of analog-to-digital converters. Available in 12-bit (ADS1015)
and 16-bit (ADS1115) versions.
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>`_.
Usage Example
=============
Single Ended
------------
.. code-block:: python
import board
import busio
from adafruit_ads1x15.single_ended import ADS1015
i2c = busio.I2C(board.SCL, board.SDA)
adc = ADS1015(i2c)
while True:
# channel 0
print(adc[0].value, adc[0].volts)
Differential
------------
.. code-block:: python
import board
import busio
from adafruit_ads1x15.differential import ADS1015
i2c = busio.I2C(board.SCL, board.SDA)
adc = ADS1015(i2c)
while True:
# channel 0 - channel 1
print(adc[(0,1)].value, adc[(0,1)].volts)
Contributing
============
Contributions are welcome! Please read our `Code of Conduct
<https://github.com/adafruit/Adafruit_CircuitPython_CircuitPython_ADS1x15/blob/master/CODE_OF_CONDUCT.md>`_
before contributing to help this project stay welcoming.
API Reference
=============
.. toctree::
:maxdepth: 2
api

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# The MIT License (MIT)
#
# Copyright (c) 2017 Carter Nelson for Adafruit Industries
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
"""
`adafruit__ads1x15`
====================================================
CircuitPython driver for ADS1015/1115 ADCs.
* Author(s): Carter Nelson
"""
import time
from micropython import const
from adafruit_bus_device.i2c_device import I2CDevice
# Register and other configuration values:
ADS1x15_DEFAULT_ADDRESS = const(0x48)
ADS1x15_POINTER_CONVERSION = const(0x00)
ADS1x15_POINTER_CONFIG = const(0x01)
ADS1x15_POINTER_LOW_THRESHOLD = const(0x02)
ADS1x15_POINTER_HIGH_THRESHOLD = const(0x03)
ADS1x15_CONFIG_OS_SINGLE = const(0x8000)
ADS1x15_CONFIG_MUX_OFFSET = const(12)
# Maping of gain values to config register values.
ADS1x15_CONFIG_GAIN = {
2/3: 0x0000,
1: 0x0200,
2: 0x0400,
4: 0x0600,
8: 0x0800,
16: 0x0A00
}
ADS1x15_PGA_RANGE = {
2/3: 6.144,
1: 4.096,
2: 2.048,
4: 1.024,
8: 0.512,
16: 0.256
}
ADS1x15_CONFIG_MODE_CONTINUOUS = const(0x0000)
ADS1x15_CONFIG_MODE_SINGLE = const(0x0100)
# Mapping of data/sample rate to config register values for ADS1015 (faster).
ADS1015_CONFIG_DR = {
128: 0x0000,
250: 0x0020,
490: 0x0040,
920: 0x0060,
1600: 0x0080,
2400: 0x00A0,
3300: 0x00C0
}
# Mapping of data/sample rate to config register values for ADS1115 (slower).
ADS1115_CONFIG_DR = {
8: 0x0000,
16: 0x0020,
32: 0x0040,
64: 0x0060,
128: 0x0080,
250: 0x00A0,
475: 0x00C0,
860: 0x00E0
}
ADS1x15_CONFIG_COMP_WINDOW = const(0x0010)
ADS1x15_CONFIG_COMP_ACTIVE_HIGH = const(0x0008)
ADS1x15_CONFIG_COMP_LATCHING = const(0x0004)
ADS1x15_CONFIG_COMP_QUE = {
1: 0x0000,
2: 0x0001,
4: 0x0002
}
ADS1x15_CONFIG_COMP_QUE_DISABLE = const(0x0003)
ADS1x15_DIFF_CHANNELS = {
(0,1): 0,
(0,3): 1,
(1,3): 2,
(2,3): 3
}
class ADC_Channel(object):
"""Provides per channel access to ADC readings."""
def __init__(self, adc, channel):
self._adc = adc
self._channel = channel
@property
def value(self, ):
"""ADC reading in raw counts."""
return self._adc._read_channel(self._channel)
@property
def volts(self, ):
"""ADC reading in volts."""
return self._adc._read_channel_volts(self._channel)
class ADS1x15(object):
"""Base functionality for ADS1x15 analog to digital converters."""
def __init__(self, i2c, address=ADS1x15_DEFAULT_ADDRESS, **kwargs):
self.buf = bytearray(3)
self.i2c_device = I2CDevice(i2c, address)
self.bits = None
self._channels = [ADC_Channel(self, 0),
ADC_Channel(self, 1),
ADC_Channel(self, 2),
ADC_Channel(self, 3)]
def _data_rate_default(self):
"""Retrieve the default data rate for this ADC (in samples per second).
Should be implemented by subclasses.
"""
raise NotImplementedError('Subclasses must implement _data_rate_default!')
def _data_rate_config(self, data_rate):
"""Subclasses should override this function and return a 16-bit value
that can be OR'ed with the config register to set the specified
data rate. If a value of None is specified then a default data_rate
setting should be returned. If an invalid or unsupported data_rate is
provided then an exception should be thrown.
"""
raise NotImplementedError('Subclass must implement _data_rate_config function!')
def _conversion_value(self, low, high):
"""Subclasses should override this function that takes the low and high
byte of a conversion result and returns a signed integer value.
"""
raise NotImplementedError('Subclass must implement _conversion_value function!')
def _read_channel(self, channel):
"""Subclasses should override this function to return a value for the
requested channels as a signed integer value.
"""
raise NotImplementedError('Subclass must implement _read_channel function!')
def _read_channel_volts(self, channel):
"""Subclasses should override this function to return a value for the
requested channels as a float value.
"""
raise NotImplementedError('Subclass must implement _read_channel_volts function!')
def _read(self, mux, gain, data_rate, mode):
"""Perform an ADC read with the provided mux, gain, data_rate, and mode
values. Returns the signed integer result of the read.
"""
config = ADS1x15_CONFIG_OS_SINGLE # Go out of power-down mode for conversion.
# Specify mux value.
config |= (mux & 0x07) << ADS1x15_CONFIG_MUX_OFFSET
# Validate the passed in gain and then set it in the config.
if gain not in ADS1x15_CONFIG_GAIN:
raise ValueError('Gain must be one of: 2/3, 1, 2, 4, 8, 16')
config |= ADS1x15_CONFIG_GAIN[gain]
# Set the mode (continuous or single shot).
config |= mode
# Get the default data rate if none is specified (default differs between
# ADS1015 and ADS1115).
if data_rate is None:
data_rate = self._data_rate_default()
# Set the data rate (this is controlled by the subclass as it differs
# between ADS1015 and ADS1115).
config |= self._data_rate_config(data_rate)
config |= ADS1x15_CONFIG_COMP_QUE_DISABLE # Disble comparator mode.
# Send the config value to start the ADC conversion.
# Explicitly break the 16-bit value down to a big endian pair of bytes.
self.buf[0] = ADS1x15_POINTER_CONFIG
self.buf[1] = (config >> 8) & 0xFF
self.buf[2] = config & 0xFF
with self.i2c_device as i2c:
i2c.write(self.buf)
# Wait for the ADC sample to finish based on the sample rate plus a
# small offset to be sure (0.1 millisecond).
time.sleep(1.0/data_rate+0.0001)
# Retrieve the result.
self.buf[0] = ADS1x15_POINTER_CONVERSION
i2c.write(self.buf, end=1, stop=False)
i2c.read_into(self.buf, start=1)
return self._conversion_value(self.buf[2], self.buf[1])
def stop_adc(self):
"""Stop all continuous ADC conversions (either normal or difference mode).
"""
# Set the config register to its default value of 0x8583 to stop
# continuous conversions.
self.buf[0] = ADS1x15_POINTER_CONFIG
self.buf[1] = 0x85
self.buf[2] = 0x83
with self.i2c_device as i2c:
i2c.write(self.buf)
def get_last_result(self):
"""Read the last conversion result when in continuous conversion mode.
Will return a signed integer value.
"""
# Retrieve the conversion register value, convert to a signed int, and
# return it.
self.buf[0] = ADS1x15_POINTER_CONVERSION
with self.i2c_device as i2c:
i2c.write(self.buf, end=1, stop=False)
i2c.read_into(self.buf, start=1)
return self._conversion_value(self.buf[2], self.buf[1])

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from .adafruit_ads1x15 import *
class ADS1x15_Differential(ADS1x15):
"""Base functionality for ADS1x15 analog to digital converters operating
in differential mode."""
def __getitem__(self, key):
return self._channels[ADS1x15_DIFF_CHANNELS[key]]
def read_adc_difference(self, differential, gain=1, data_rate=None):
"""Read the difference between two ADC channels and return the ADC value
as a signed integer result. Differential must be one of:
- 0 = Channel 0 minus channel 1
- 1 = Channel 0 minus channel 3
- 2 = Channel 1 minus channel 3
- 3 = Channel 2 minus channel 3
"""
assert 0 <= differential <= 3, 'Differential must be a value within 0-3!'
# Perform a single shot read using the provided differential value
# as the mux value (which will enable differential mode).
return self._read(differential, gain, data_rate, ADS1x15_CONFIG_MODE_SINGLE)
def read_volts_difference(self, differential, gain=1, data_rate=None):
"""Read the difference between two ADC channels and return the voltage value
as a floating point result. Differential must be one of:
- 0 = Channel 0 minus channel 1
- 1 = Channel 0 minus channel 3
- 2 = Channel 1 minus channel 3
- 3 = Channel 2 minus channel 3
"""
assert 0 <= differential <= 3, 'Differential must be a value within 0-3!'
raw = self.read_adc_difference(differential, gain, data_rate)
volts = raw * (ADS1x15_PGA_RANGE[gain] / (2**(self.bits-1) - 1))
return volts
def start_adc_difference(self, differential, gain=1, data_rate=None):
"""Start continuous ADC conversions between two ADC channels. Differential
must be one of:
- 0 = Channel 0 minus channel 1
- 1 = Channel 0 minus channel 3
- 2 = Channel 1 minus channel 3
- 3 = Channel 2 minus channel 3
Will return an initial conversion result, then call the get_last_result()
function continuously to read the most recent conversion result. Call
stop_adc() to stop conversions.
"""
assert 0 <= differential <= 3, 'Differential must be a value within 0-3!'
# Perform a single shot read using the provided differential value
# as the mux value (which will enable differential mode).
return self._read(differential, gain, data_rate, ADS1x15_CONFIG_MODE_CONTINUOUS)
class ADS1015(ADS1x15_Differential):
"""ADS1015 12-bit differential analog to digital converter instance."""
def __init__(self, *args, **kwargs):
super(ADS1015, self).__init__(*args, **kwargs)
self.bits = 12
def _data_rate_default(self):
# Default from datasheet page 19, config register DR bit default.
return 1600
def _data_rate_config(self, data_rate):
if data_rate not in ADS1015_CONFIG_DR:
raise ValueError('Data rate must be one of: 128, 250, 490, 920, 1600, 2400, 3300')
return ADS1015_CONFIG_DR[data_rate]
def _conversion_value(self, low, high):
# Convert to 12-bit signed value.
value = ((high & 0xFF) << 4) | ((low & 0xFF) >> 4)
# Check for sign bit and turn into a negative value if set.
if value & 0x800 != 0:
value -= 1 << 12
return value
def _read_channel(self, channel):
return self.read_adc_difference(channel)
def _read_channel_volts(self, channel):
return self.read_volts_difference(channel)
class ADS1115(ADS1x15_Differential):
"""ADS1115 16-bit differential analog to digital converter instance."""
def __init__(self, *args, **kwargs):
super(ADS1115, self).__init__(*args, **kwargs)
self.bits = 16
def _data_rate_default(self):
# Default from datasheet page 16, config register DR bit default.
return 128
def _data_rate_config(self, data_rate):
if data_rate not in ADS1115_CONFIG_DR:
raise ValueError('Data rate must be one of: 8, 16, 32, 64, 128, 250, 475, 860')
return ADS1115_CONFIG_DR[data_rate]
def _conversion_value(self, low, high):
# Convert to 16-bit signed value.
value = ((high & 0xFF) << 8) | (low & 0xFF)
# Check for sign bit and turn into a negative value if set.
if value & 0x8000 != 0:
value -= 1 << 16
return value
def _read_channel(self, channel):
return self.read_adc_difference(channel)
def _read_channel_volts(self, channel):
return self.read_volts_difference(channel)

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from .adafruit_ads1x15 import *
class ADS1x15_SingleEnded(ADS1x15):
"""Base functionality for ADS1x15 analog to digital converters operating
in single ended mode."""
def __getitem__(self, key):
return self._channels[key]
def read_adc(self, channel, gain=1, data_rate=None):
"""Read a single ADC channel and return the ADC value as a signed integer
result. Channel must be a value within 0-3.
"""
assert 0 <= channel <= 3, 'Channel must be a value within 0-3!'
# Perform a single shot read and set the mux value to the channel plus
# the highest bit (bit 3) set.
return self._read(channel + 0x04, gain, data_rate, ADS1x15_CONFIG_MODE_SINGLE)
def read_volts(self, channel, gain=1, data_rate=None):
"""Read a single ADC channel and return the voltage value as a floating point
result. Channel must be a value within 0-3.
"""
assert 0 <= channel <= 3, 'Channel must be a value within 0-3!'
raw = self.read_adc(channel, gain, data_rate)
volts = raw * (ADS1x15_PGA_RANGE[gain] / (2**(self.bits-1) - 1))
return volts
def start_adc(self, channel, gain=1, data_rate=None):
"""Start continuous ADC conversions on the specified channel (0-3). Will
return an initial conversion result, then call the get_last_result()
function to read the most recent conversion result. Call stop_adc() to
stop conversions.
"""
assert 0 <= channel <= 3, 'Channel must be a value within 0-3!'
# Start continuous reads and set the mux value to the channel plus
# the highest bit (bit 3) set.
return self._read(channel + 0x04, gain, data_rate, ADS1x15_CONFIG_MODE_CONTINUOUS)
class ADS1015(ADS1x15_SingleEnded):
"""ADS1015 12-bit single ended analog to digital converter instance."""
def __init__(self, *args, **kwargs):
super(ADS1015, self).__init__(*args, **kwargs)
self.bits = 12
def _data_rate_default(self):
# Default from datasheet page 19, config register DR bit default.
return 1600
def _data_rate_config(self, data_rate):
if data_rate not in ADS1015_CONFIG_DR:
raise ValueError('Data rate must be one of: 128, 250, 490, 920, 1600, 2400, 3300')
return ADS1015_CONFIG_DR[data_rate]
def _conversion_value(self, low, high):
# Convert to 12-bit signed value.
value = ((high & 0xFF) << 4) | ((low & 0xFF) >> 4)
# Check for sign bit and turn into a negative value if set.
if value & 0x800 != 0:
value -= 1 << 12
return value
def _read_channel(self, channel):
return self.read_adc(channel)
def _read_channel_volts(self, channel):
return self.read_volts(channel)
class ADS1115(ADS1x15_SingleEnded):
"""ADS1115 16-bit single ended analog to digital converter instance."""
def __init__(self, *args, **kwargs):
super(ADS1115, self).__init__(*args, **kwargs)
self.bits = 16
def _data_rate_default(self):
# Default from datasheet page 16, config register DR bit default.
return 128
def _data_rate_config(self, data_rate):
if data_rate not in ADS1115_CONFIG_DR:
raise ValueError('Data rate must be one of: 8, 16, 32, 64, 128, 250, 475, 860')
return ADS1115_CONFIG_DR[data_rate]
def _conversion_value(self, low, high):
# Convert to 16-bit signed value.
value = ((high & 0xFF) << 8) | (low & 0xFF)
# Check for sign bit and turn into a negative value if set.
if value & 0x8000 != 0:
value -= 1 << 16
return value
def _read_channel(self, channel):
return self.read_adc(channel)
def _read_channel_volts(self, channel):
return self.read_volts(channel)

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.. If you created a package, create one automodule per module in the package.
.. automodule:: adafruit_ads1x15
:members:
.. automodule:: differential
:members:
.. automodule:: single_ended
:members:

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# -*- coding: utf-8 -*-
import os
import sys
sys.path.insert(0, os.path.abspath('.'))
# -- General configuration ------------------------------------------------
# Add any Sphinx extension module names here, as strings. They can be
# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
# ones.
extensions = [
'sphinx.ext.autodoc',
'sphinx.ext.intersphinx',
'sphinx.ext.viewcode',
]
intersphinx_mapping = {'python': ('https://docs.python.org/3.4', None),'BusDevice': ('https://circuitpython.readthedocs.io/projects/bus_device/en/latest/', None),'Register': ('https://circuitpython.readthedocs.io/projects/register/en/latest/', None),'CircuitPython': ('https://circuitpython.readthedocs.io/en/latest/', None)}
# Add any paths that contain templates here, relative to this directory.
templates_path = ['_templates']
source_suffix = '.rst'
# The master toctree document.
master_doc = 'README'
# General information about the project.
project = u'Adafruit CIRCUITPYTHON_ADS1X15 Library'
copyright = u'2017 Carter Nelson'
author = u'Carter Nelson'
# The version info for the project you're documenting, acts as replacement for
# |version| and |release|, also used in various other places throughout the
# built documents.
#
# The short X.Y version.
version = u'1.0'
# The full version, including alpha/beta/rc tags.
release = u'1.0'
# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
#
# This is also used if you do content translation via gettext catalogs.
# Usually you set "language" from the command line for these cases.
language = None
# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
# This patterns also effect to html_static_path and html_extra_path
exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
# The reST default role (used for this markup: `text`) to use for all
# documents.
#
default_role = "any"
# If true, '()' will be appended to :func: etc. cross-reference text.
#
add_function_parentheses = True
# The name of the Pygments (syntax highlighting) style to use.
pygments_style = 'sphinx'
# If true, `todo` and `todoList` produce output, else they produce nothing.
todo_include_todos = False
# -- Options for HTML output ----------------------------------------------
# The theme to use for HTML and HTML Help pages. See the documentation for
# a list of builtin themes.
#
on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
if not on_rtd: # only import and set the theme if we're building docs locally
try:
import sphinx_rtd_theme
html_theme = 'sphinx_rtd_theme'
html_theme_path = [sphinx_rtd_theme.get_html_theme_path(), '.']
except:
html_theme = 'default'
html_theme_path = ['.']
else:
html_theme_path = ['.']
# Add any paths that contain custom static files (such as style sheets) here,
# relative to this directory. They are copied after the builtin static files,
# so a file named "default.css" will overwrite the builtin "default.css".
html_static_path = ['_static']
# Output file base name for HTML help builder.
htmlhelp_basename = 'AdafruitCIRCUITPYTHON_ADS1X15Librarydoc'
# -- Options for LaTeX output ---------------------------------------------
latex_elements = {
# The paper size ('letterpaper' or 'a4paper').
#
# 'papersize': 'letterpaper',
# The font size ('10pt', '11pt' or '12pt').
#
# 'pointsize': '10pt',
# Additional stuff for the LaTeX preamble.
#
# 'preamble': '',
# Latex figure (float) alignment
#
# 'figure_align': 'htbp',
}
# Grouping the document tree into LaTeX files. List of tuples
# (source start file, target name, title,
# author, documentclass [howto, manual, or own class]).
latex_documents = [
(master_doc, 'AdafruitCIRCUITPYTHON_ADS1X15Library.tex', u'Adafruit CIRCUITPYTHON_ADS1X15 Library Documentation',
author, 'manual'),
]
# -- Options for manual page output ---------------------------------------
# One entry per manual page. List of tuples
# (source start file, name, description, authors, manual section).
man_pages = [
(master_doc, 'adafruitCIRCUITPYTHON_ADS1X15library', u'Adafruit CIRCUITPYTHON_ADS1X15 Library Documentation',
[author], 1)
]
# -- Options for Texinfo output -------------------------------------------
# Grouping the document tree into Texinfo files. List of tuples
# (source start file, target name, title, author,
# dir menu entry, description, category)
texinfo_documents = [
(master_doc, 'AdafruitCIRCUITPYTHON_ADS1X15Library', u'Adafruit CIRCUITPYTHON_ADS1X15 Library Documentation',
author, 'AdafruitCIRCUITPYTHON_ADS1X15Library', 'One line description of project.',
'Miscellaneous'),
]

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requirements_file: requirements.txt

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adafruit-circuitpython-bus-device