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Merge pull request #274 from waveform80/doc-reorg

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Doc reorganization
This commit is contained in:
Dave Jones
2016-04-10 16:58:27 +01:00
parent 8f8dddd403 ecc8df8041
commit e2b8171bbb
38 changed files with 1250 additions and 371 deletions
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47
docs/api_boards.rst
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@@ -15,22 +15,22 @@ individually.
All GPIO pin numbers use Broadcom (BCM) numbering. See the :doc:`recipes`
page for more information.
LED Board
=========
LEDBoard
========
.. autoclass:: LEDBoard(\*pins, pwm=False, active_high=True, initial_value=False, \*\*named_pins)
:inherited-members:
:members:
LED Bar Graph
=============
LEDBarGraph
===========
.. autoclass:: LEDBarGraph(\*pins, initial_value=0)
:inherited-members:
:members:
Traffic Lights
==============
TrafficLights
=============
.. autoclass:: TrafficLights
:inherited-members:
@@ -106,3 +106,38 @@ Energenie
:inherited-members:
:members:
Base Classes
============
The classes in the sections above are derived from a series of base classes,
some of which are effectively abstract. The classes form the (partial)
hierarchy displayed in the graph below:
.. image:: images/composite_device_hierarchy.*
For composite devices, the following chart shows which devices are composed of
which other devices:
.. image:: images/composed_devices.*
The following sections document these base classes for advanced users that wish
to construct classes for their own devices.
LEDCollection
=============
.. autoclass:: LEDCollection
:members:
CompositeOutputDevice
=====================
.. autoclass:: CompositeOutputDevice(\*args, _order=None, \*\*kwargs)
:members:
CompositeDevice
===============
.. autoclass:: CompositeDevice(\*args, _order=None, \*\*kwargs)
:members:

119
docs/api_generic.rst
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@@ -1,11 +1,11 @@
===============
Generic Devices
Generic Classes
===============
.. currentmodule:: gpiozero
The GPIO Zero class hierarchy is quite extensive. It contains several base
classes:
classes (most of which are documented in their corresponding chapters):
* :class:`Device` is the root of the hierarchy, implementing base functionality
like :meth:`~Device.close` and context manager handlers.
@@ -22,125 +22,46 @@ classes:
* :class:`CompositeDevice` represents devices composed of multiple other
devices like HATs
There are also several `mixin classes`_:
There are also several `mixin classes`_ for adding important functionality
at numerous points in the hierarchy, which is illustrated below:
* :class:`ValuesMixin` which defines the ``values`` properties; there is rarely
a need to use this as the base classes mentioned above both include it
(so all classes in GPIO Zero include the ``values`` property)
* :class:`SourceMixin` which defines the ``source`` property; this is generally
included in novel output device classes
* :class:`SharedMixin` which causes classes to track their construction and
return existing instances when equivalent constructor arguments are passed
* :class:`EventsMixin` which adds activated/deactivated events to devices
along with the machinery to trigger those events
* :class:`HoldMixin` which derives from :class:`EventsMixin` and adds the
held event to devices along with the machinery to repeatedly trigger it
.. image:: images/device_hierarchy.*
.. _mixin classes: https://en.wikipedia.org/wiki/Mixin
The current class hierarchies are displayed below. For brevity, the mixin
classes (and some other details) are omitted, and the chart is broken into
pieces by base class. The lighter boxes represent classes that are "effectively
abstract". These classes aren't directly useful without sub-classing them and
adding bits.
First, the classes below :class:`GPIODevice`:
.. image:: images/gpio_device_hierarchy.*
Next, the classes below :class:`SPIDevice`:
.. image:: images/spi_device_hierarchy.*
Next, the classes below :class:`InternalDevice`:
.. image:: images/other_device_hierarchy.*
Next, the classes below :class:`CompositeDevice`:
.. image:: images/composite_device_hierarchy.*
Finally, for composite devices, the following chart shows which devices are
composed of which other devices:
.. image:: images/composed_devices.*
Base Classes
============
Device
======
.. autoclass:: Device
:members: close, closed, value, is_active
.. autoclass:: GPIODevice(pin)
:members:
.. autoclass:: SPIDevice
:members:
.. autoclass:: InternalDevice()
:members:
.. autoclass:: CompositeDevice(\*args, _order=None, \*\*kwargs)
:members:
.. autoclass:: CompositeOutputDevice(\*args, _order=None, \*\*kwargs)
:members:
Input Devices
=============
.. autoclass:: InputDevice(pin, pull_up=False)
:members:
.. autoclass:: DigitalInputDevice(pin, pull_up=False, bounce_time=None)
:members:
.. autoclass:: SmoothedInputDevice
:members:
Output Devices
==============
.. autoclass:: OutputDevice(pin, active_high=True, initial_value=False)
:members:
.. autoclass:: DigitalOutputDevice(pin, active_high=True, initial_value=False)
:members:
.. autoclass:: PWMOutputDevice(pin, active_high=True, initial_value=0, frequency=100)
:members:
SPI Devices
ValuesMixin
===========
.. autoclass:: AnalogInputDevice
:members:
Composite Devices
=================
.. autoclass:: LEDCollection
:members:
Mixin Classes
=============
.. autoclass:: ValuesMixin(...)
:members:
SourceMixin
===========
.. autoclass:: SourceMixin(...)
:members:
SharedMixin
===========
.. autoclass:: SharedMixin(...)
:members: _shared_key
EventsMixin
===========
.. autoclass:: EventsMixin(...)
:members:
HoldMixin
=========
.. autoclass:: HoldMixin(...)
:members:

36
docs/api_input.rst
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@@ -47,3 +47,39 @@ Distance Sensor (HC-SR04)
.. autoclass:: DistanceSensor(echo, trigger, queue_len=30, max_distance=1, threshold_distance=0.3, partial=False)
:members: wait_for_in_range, wait_for_out_of_range, trigger, echo, when_in_range, when_out_of_range, max_distance, distance, threshold_distance
Base Classes
============
The classes in the sections above are derived from a series of base classes,
some of which are effectively abstract. The classes form the (partial)
hierarchy displayed in the graph below:
.. image:: images/input_device_hierarchy.*
The following sections document these base classes for advanced users that wish
to construct classes for their own devices.
DigitalInputDevice
==================
.. autoclass:: DigitalInputDevice(pin, pull_up=False, bounce_time=None)
:members:
SmoothedInputDevice
===================
.. autoclass:: SmoothedInputDevice
:members:
InputDevice
===========
.. autoclass:: InputDevice(pin, pull_up=False)
:members:
GPIODevice
==========
.. autoclass:: GPIODevice(pin)
:members:

31
docs/api_other.rst
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@@ -8,7 +8,38 @@ GPIO Zero also provides several "internal" devices which represent facilities
provided by the operating system itself. These can be used to react to things
like the time of day, or whether a server is available on the network.
.. warning::
These devices are experimental and their API is not yet considered stable.
We welcome any comments from testers, especially regarding new "internal
devices" that you'd find useful!
TimeOfDay
=========
.. autoclass:: TimeOfDay
PingServer
==========
.. autoclass:: PingServer
Base Classes
============
The classes in the sections above are derived from a series of base classes,
some of which are effectively abstract. The classes form the (partial)
hierarchy displayed in the graph below:
.. image:: images/other_device_hierarchy.*
The following sections document these base classes for advanced users that wish
to construct classes for their own devices.
InternalDevice
==============
.. autoclass:: InternalDevice()
:members:

38
docs/api_output.rst
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@@ -42,3 +42,41 @@ Motor
.. autoclass:: Motor(forward, backward)
:members: forward, backward, stop
Base Classes
============
The classes in the sections above are derived from a series of base classes,
some of which are effectively abstract. The classes form the (partial)
hierarchy displayed in the graph below:
.. image:: images/output_device_hierarchy.*
The following sections document these base classes for advanced users that wish
to construct classes for their own devices.
DigitalOutputDevice
===================
.. autoclass:: DigitalOutputDevice(pin, active_high=True, initial_value=False)
:members:
PWMOutputDevice
===============
.. autoclass:: PWMOutputDevice(pin, active_high=True, initial_value=0, frequency=100)
:members:
OutputDevice
============
.. autoclass:: OutputDevice(pin, active_high=True, initial_value=False)
:members:
GPIODevice
==========
.. autoclass:: GPIODevice(pin)
:members:
:noindex:

36
docs/api_spi.rst
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@@ -83,12 +83,24 @@ implementation if not.
Analog to Digital Converters (ADC)
==================================
.. autoclass:: MCP3001
:members: value
.. autoclass:: MCP3002
:members: channel, value, differential
.. autoclass:: MCP3004
:members: channel, value, differential
.. autoclass:: MCP3008
:members: channel, value, differential
.. autoclass:: MCP3201
:members: value
.. autoclass:: MCP3202
:members: channel, value, differential
.. autoclass:: MCP3204
:members: channel, value, differential
@@ -104,3 +116,27 @@ Analog to Digital Converters (ADC)
.. autoclass:: MCP3304
:members: channel, value, differential
Base Classes
============
The classes in the sections above are derived from a series of base classes,
some of which are effectively abstract. The classes form the (partial)
hierarchy displayed in the graph below:
.. image:: images/spi_device_hierarchy.*
The following sections document these base classes for advanced users that wish
to construct classes for their own devices.
AnalogInputDevice
=================
.. autoclass:: AnalogInputDevice
:members:
SPIDevice
=========
.. autoclass:: SPIDevice
:members:

25
docs/api_tools.rst
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@@ -17,16 +17,23 @@ Given that :attr:`~gpiozero.SourceMixin.source` and
excellent source of utilities is the :mod:`itertools` module in the standard
library.
.. warning::
While the devices API is now considered stable and won't change in
backwards incompatible ways, the tools API is *not* yet considered stable.
It is potentially subject to change in future versions. We welcome any
comments from testers!
Single source conversions
=========================
.. autofunction:: negated
.. autofunction:: absoluted
.. autofunction:: clamped
.. autofunction:: inverted
.. autofunction:: scaled
.. autofunction:: clamped
.. autofunction:: negated
.. autofunction:: post_delayed
@@ -36,21 +43,23 @@ Single source conversions
.. autofunction:: queued
.. autofunction:: scaled
Combining sources
=================
.. autofunction:: conjunction
.. autofunction:: all_values
.. autofunction:: disjunction
.. autofunction:: any_values
.. autofunction:: averaged
Artifical sources
=================
.. autofunction:: cos_values
.. autofunction:: random_values
.. autofunction:: sin_values
.. autofunction:: cos_values

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docs/images/composite_device_hierarchy.dot
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@@ -31,6 +31,6 @@ digraph classes {
Robot->CompositeDevice;
RyanteckRobot->Robot;
CamJamKitRobot->Robot;
Motor->CompositeDevice;
Energenie->Device;
}

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docs/images/composite_device_hierarchy.svg
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@@ -1,7 +1,7 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<!-- Generated by graphviz version 2.36.0 (20140111.2315)
<!-- Generated by graphviz version 2.38.0 (20140413.2041)
-->
<!-- Title: classes Pages: 1 -->
<svg width="587pt" height="476pt"
@@ -11,8 +11,8 @@
<polygon fill="white" stroke="none" points="-4,4 -4,-472 583,-472 583,4 -4,4"/>
<!-- Device -->
<g id="node1" class="node"><title>Device</title>
<polygon fill="#9ec6e0" stroke="#9ec6e0" points="449,-468 395,-468 395,-432 449,-432 449,-468"/>
<text text-anchor="middle" x="422" y="-447.5" font-family="Sans" font-size="10.00" fill="#000000">Device</text>
<polygon fill="#9ec6e0" stroke="#9ec6e0" points="499,-468 445,-468 445,-432 499,-432 499,-468"/>
<text text-anchor="middle" x="472" y="-447.5" font-family="Sans" font-size="10.00" fill="#000000">Device</text>
</g>
<!-- CompositeDevice -->
<g id="node2" class="node"><title>CompositeDevice</title>
@@ -21,8 +21,8 @@
</g>
<!-- CompositeDevice&#45;&gt;Device -->
<g id="edge1" class="edge"><title>CompositeDevice&#45;&gt;Device</title>
<path fill="none" stroke="black" d="M422,-396.303C422,-404.017 422,-413.288 422,-421.888"/>
<polygon fill="black" stroke="black" points="418.5,-421.896 422,-431.896 425.5,-421.896 418.5,-421.896"/>
<path fill="none" stroke="black" d="M434.36,-396.303C440.233,-404.526 447.369,-414.517 453.842,-423.579"/>
<polygon fill="black" stroke="black" points="451.122,-425.793 459.783,-431.896 456.818,-421.724 451.122,-425.793"/>
</g>
<!-- CompositeOutputDevice -->
<g id="node3" class="node"><title>CompositeOutputDevice</title>
@@ -174,5 +174,15 @@
<path fill="none" stroke="black" d="M476.202,-324.303C467.396,-332.865 456.618,-343.344 446.999,-352.696"/>
<polygon fill="black" stroke="black" points="444.323,-350.415 439.593,-359.896 449.203,-355.434 444.323,-350.415"/>
</g>
<!-- Energenie -->
<g id="node18" class="node"><title>Energenie</title>
<polygon fill="#2980b9" stroke="#2980b9" points="555.5,-396 490.5,-396 490.5,-360 555.5,-360 555.5,-396"/>
<text text-anchor="middle" x="523" y="-375.5" font-family="Sans" font-size="10.00" fill="#ffffff">Energenie</text>
</g>
<!-- Energenie&#45;&gt;Device -->
<g id="edge17" class="edge"><title>Energenie&#45;&gt;Device</title>
<path fill="none" stroke="black" d="M510.393,-396.303C504.403,-404.526 497.124,-414.517 490.521,-423.579"/>
<polygon fill="black" stroke="black" points="487.522,-421.752 484.462,-431.896 493.179,-425.874 487.522,-421.752"/>
</g>
</g>
</svg>
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@@ -0,0 +1,99 @@
/* vim: set et sw=4 sts=4: */
digraph classes {
graph [rankdir=BT];
node [shape=rect, style=filled, fontname=Sans, fontsize=10];
edge [];
/* Mixin classes */
node [color="#c69ee0", fontcolor="#000000"]
ValuesMixin;
SourceMixin;
SharedMixin;
EventsMixin;
HoldMixin;
/* Abstract classes */
node [color="#9ec6e0", fontcolor="#000000"]
Device;
GPIODevice;
SmoothedInputDevice;
AnalogInputDevice;
MCP3xxx;
MCP33xx;
CompositeDevice;
CompositeOutputDevice;
LEDCollection;
InternalDevice;
GPIODevice->Device;
Device->ValuesMixin;
/* Concrete classes */
node [color="#2980b9", fontcolor="#ffffff"];
InputDevice->GPIODevice;
DigitalInputDevice->InputDevice;
DigitalInputDevice->EventsMixin;
SmoothedInputDevice->InputDevice;
SmoothedInputDevice->EventsMixin;
Button->DigitalInputDevice;
Button->HoldMixin;
MotionSensor->SmoothedInputDevice;
LightSensor->SmoothedInputDevice;
LineSensor->SmoothedInputDevice;
DistanceSensor->SmoothedInputDevice;
OutputDevice->GPIODevice;
OutputDevice->SourceMixin;
DigitalOutputDevice->OutputDevice;
LED->DigitalOutputDevice;
Buzzer->DigitalOutputDevice;
PWMOutputDevice->OutputDevice;
PWMLED->PWMOutputDevice;
RGBLED->Device;
RGBLED->SourceMixin;
SPIDevice->Device;
AnalogInputDevice->SPIDevice;
MCP3xxx->AnalogInputDevice;
MCP33xx->MCP3xxx;
MCP3004->MCP3xxx;
MCP3008->MCP3xxx;
MCP3204->MCP3xxx;
MCP3208->MCP3xxx;
MCP3301->MCP33xx;
MCP3302->MCP33xx;
MCP3304->MCP33xx;
CompositeDevice->Device;
CompositeOutputDevice->CompositeDevice;
CompositeOutputDevice->SourceMixin;
LEDCollection->CompositeOutputDevice;
LEDBoard->LEDCollection;
LEDBarGraph->LEDCollection;
PiLiter->LEDBoard;
PiLiterBarGraph->LEDBarGraph;
TrafficLights->LEDBoard;
PiTraffic->TrafficLights;
TrafficLightsBuzzer->CompositeOutputDevice;
FishDish->TrafficLightsBuzzer;
TrafficHat->TrafficLightsBuzzer;
Robot->CompositeDevice;
Robot->SourceMixin;
Energenie->Device;
Energenie->SourceMixin;
RyanteckRobot->Robot;
CamJamKitRobot->Robot;
Motor->CompositeDevice;
Motor->SourceMixin;
InternalDevice->Device;
InternalDevice->EventsMixin;
TimeOfDay->InternalDevice;
PingServer->InternalDevice;
}

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@@ -0,0 +1,568 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<!-- Generated by graphviz version 2.36.0 (20140111.2315)
-->
<!-- Title: classes Pages: 1 -->
<svg width="1698pt" height="548pt"
viewBox="0.00 0.00 1698.00 548.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 544)">
<title>classes</title>
<polygon fill="white" stroke="none" points="-4,4 -4,-544 1694,-544 1694,4 -4,4"/>
<!-- ValuesMixin -->
<g id="node1" class="node"><title>ValuesMixin</title>
<polygon fill="#c69ee0" stroke="#c69ee0" points="602,-540 530,-540 530,-504 602,-504 602,-540"/>
<text text-anchor="middle" x="566" y="-519.5" font-family="Sans" font-size="10.00" fill="#000000">ValuesMixin</text>
</g>
<!-- SourceMixin -->
<g id="node2" class="node"><title>SourceMixin</title>
<polygon fill="#c69ee0" stroke="#c69ee0" points="448,-396 374,-396 374,-360 448,-360 448,-396"/>
<text text-anchor="middle" x="411" y="-375.5" font-family="Sans" font-size="10.00" fill="#000000">SourceMixin</text>
</g>
<!-- SharedMixin -->
<g id="node3" class="node"><title>SharedMixin</title>
<polygon fill="#c69ee0" stroke="#c69ee0" points="423.5,-36 348.5,-36 348.5,-0 423.5,-0 423.5,-36"/>
<text text-anchor="middle" x="386" y="-15.5" font-family="Sans" font-size="10.00" fill="#000000">SharedMixin</text>
</g>
<!-- EventsMixin -->
<g id="node4" class="node"><title>EventsMixin</title>
<polygon fill="#c69ee0" stroke="#c69ee0" points="725.5,-324 652.5,-324 652.5,-288 725.5,-288 725.5,-324"/>
<text text-anchor="middle" x="689" y="-303.5" font-family="Sans" font-size="10.00" fill="#000000">EventsMixin</text>
</g>
<!-- HoldMixin -->
<g id="node5" class="node"><title>HoldMixin</title>
<polygon fill="#c69ee0" stroke="#c69ee0" points="785,-252 723,-252 723,-216 785,-216 785,-252"/>
<text text-anchor="middle" x="754" y="-231.5" font-family="Sans" font-size="10.00" fill="#000000">HoldMixin</text>
</g>
<!-- Device -->
<g id="node6" class="node"><title>Device</title>
<polygon fill="#9ec6e0" stroke="#9ec6e0" points="593,-468 539,-468 539,-432 593,-432 593,-468"/>
<text text-anchor="middle" x="566" y="-447.5" font-family="Sans" font-size="10.00" fill="#000000">Device</text>
</g>
<!-- Device&#45;&gt;ValuesMixin -->
<g id="edge2" class="edge"><title>Device&#45;&gt;ValuesMixin</title>
<path fill="none" stroke="black" d="M566,-468.303C566,-476.017 566,-485.288 566,-493.888"/>
<polygon fill="black" stroke="black" points="562.5,-493.896 566,-503.896 569.5,-493.896 562.5,-493.896"/>
</g>
<!-- GPIODevice -->
<g id="node7" class="node"><title>GPIODevice</title>
<polygon fill="#9ec6e0" stroke="#9ec6e0" points="858,-396 786,-396 786,-360 858,-360 858,-396"/>
<text text-anchor="middle" x="822" y="-375.5" font-family="Sans" font-size="10.00" fill="#000000">GPIODevice</text>
</g>
<!-- GPIODevice&#45;&gt;Device -->
<g id="edge1" class="edge"><title>GPIODevice&#45;&gt;Device</title>
<path fill="none" stroke="black" d="M785.864,-388.881C737.483,-402.11 652.094,-425.459 603.185,-438.832"/>
<polygon fill="black" stroke="black" points="602.051,-435.514 593.328,-441.527 603.897,-442.266 602.051,-435.514"/>
</g>
<!-- SmoothedInputDevice -->
<g id="node8" class="node"><title>SmoothedInputDevice</title>
<polygon fill="#9ec6e0" stroke="#9ec6e0" points="926.5,-252 803.5,-252 803.5,-216 926.5,-216 926.5,-252"/>
<text text-anchor="middle" x="865" y="-231.5" font-family="Sans" font-size="10.00" fill="#000000">SmoothedInputDevice</text>
</g>
<!-- SmoothedInputDevice&#45;&gt;EventsMixin -->
<g id="edge7" class="edge"><title>SmoothedInputDevice&#45;&gt;EventsMixin</title>
<path fill="none" stroke="black" d="M821.946,-252.124C795.57,-262.614 761.832,-276.033 734.943,-286.727"/>
<polygon fill="black" stroke="black" points="733.372,-283.585 725.373,-290.533 735.959,-290.09 733.372,-283.585"/>
</g>
<!-- InputDevice -->
<g id="node16" class="node"><title>InputDevice</title>
<polygon fill="#2980b9" stroke="#2980b9" points="858.5,-324 785.5,-324 785.5,-288 858.5,-288 858.5,-324"/>
<text text-anchor="middle" x="822" y="-303.5" font-family="Sans" font-size="10.00" fill="#ffffff">InputDevice</text>
</g>
<!-- SmoothedInputDevice&#45;&gt;InputDevice -->
<g id="edge6" class="edge"><title>SmoothedInputDevice&#45;&gt;InputDevice</title>
<path fill="none" stroke="black" d="M854.371,-252.303C849.372,-260.441 843.309,-270.311 837.788,-279.299"/>
<polygon fill="black" stroke="black" points="834.759,-277.543 832.507,-287.896 840.723,-281.207 834.759,-277.543"/>
</g>
<!-- AnalogInputDevice -->
<g id="node9" class="node"><title>AnalogInputDevice</title>
<polygon fill="#9ec6e0" stroke="#9ec6e0" points="1306,-324 1200,-324 1200,-288 1306,-288 1306,-324"/>
<text text-anchor="middle" x="1253" y="-303.5" font-family="Sans" font-size="10.00" fill="#000000">AnalogInputDevice</text>
</g>
<!-- SPIDevice -->
<g id="node30" class="node"><title>SPIDevice</title>
<polygon fill="#2980b9" stroke="#2980b9" points="1112,-396 1048,-396 1048,-360 1112,-360 1112,-396"/>
<text text-anchor="middle" x="1080" y="-375.5" font-family="Sans" font-size="10.00" fill="#ffffff">SPIDevice</text>
</g>
<!-- AnalogInputDevice&#45;&gt;SPIDevice -->
<g id="edge24" class="edge"><title>AnalogInputDevice&#45;&gt;SPIDevice</title>
<path fill="none" stroke="black" d="M1210.68,-324.124C1183.6,-335.083 1148.61,-349.237 1121.66,-360.144"/>
<polygon fill="black" stroke="black" points="1120.08,-357.007 1112.12,-364.003 1122.7,-363.496 1120.08,-357.007"/>
</g>
<!-- MCP3xxx -->
<g id="node10" class="node"><title>MCP3xxx</title>
<polygon fill="#9ec6e0" stroke="#9ec6e0" points="1488.5,-252 1429.5,-252 1429.5,-216 1488.5,-216 1488.5,-252"/>
<text text-anchor="middle" x="1459" y="-231.5" font-family="Sans" font-size="10.00" fill="#000000">MCP3xxx</text>
</g>
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<text text-anchor="middle" x="579" y="-15.5" font-family="Sans" font-size="10.00" fill="#ffffff">Buzzer</text>
</g>
<!-- Buzzer&#45;&gt;DigitalOutputDevice -->
<g id="edge13" class="edge"><title>Buzzer&#45;&gt;DigitalOutputDevice</title>
<path fill="none" stroke="black" d="M568.124,-36.3034C563.008,-44.4411 556.805,-54.311 551.155,-63.2987"/>
<polygon fill="black" stroke="black" points="548.11,-61.5667 545.751,-71.8957 554.036,-65.2919 548.11,-61.5667"/>
</g>
<!-- PWMOutputDevice -->
<g id="node15" class="node"><title>PWMOutputDevice</title>
<polygon fill="#2980b9" stroke="#2980b9" points="713,-108 609,-108 609,-72 713,-72 713,-108"/>
<text text-anchor="middle" x="661" y="-87.5" font-family="Sans" font-size="10.00" fill="#ffffff">PWMOutputDevice</text>
</g>
<!-- PWMOutputDevice&#45;&gt;OutputDevice -->
<g id="edge14" class="edge"><title>PWMOutputDevice&#45;&gt;OutputDevice</title>
<path fill="none" stroke="black" d="M630.177,-108.124C613.55,-117.361 592.835,-128.869 574.981,-138.788"/>
<polygon fill="black" stroke="black" points="572.983,-135.894 565.942,-143.81 576.383,-142.013 572.983,-135.894"/>
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<g id="node16" class="node"><title>PWMLED</title>
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<text text-anchor="middle" x="661" y="-15.5" font-family="Sans" font-size="10.00" fill="#ffffff">PWMLED</text>
</g>
<!-- PWMLED&#45;&gt;PWMOutputDevice -->
<g id="edge15" class="edge"><title>PWMLED&#45;&gt;PWMOutputDevice</title>
<path fill="none" stroke="black" d="M661,-36.3034C661,-44.0173 661,-53.2875 661,-61.8876"/>
<polygon fill="black" stroke="black" points="657.5,-61.8956 661,-71.8957 664.5,-61.8957 657.5,-61.8956"/>
</g>
<!-- RGBLED -->
<g id="node17" class="node"><title>RGBLED</title>
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<text text-anchor="middle" x="554" y="-231.5" font-family="Sans" font-size="10.00" fill="#ffffff">RGBLED</text>
</g>
<!-- RGBLED&#45;&gt;Device -->
<g id="edge16" class="edge"><title>RGBLED&#45;&gt;Device</title>
<path fill="none" stroke="black" d="M543.865,-252.303C539.148,-260.356 533.438,-270.106 528.218,-279.018"/>
<polygon fill="black" stroke="black" points="525.052,-277.498 523.018,-287.896 531.092,-281.036 525.052,-277.498"/>
</g>
</g>
</svg>
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docs/images/gpio_device_hierarchy.dot → docs/images/input_device_hierarchy.dot
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@@ -23,13 +23,5 @@ digraph classes {
LightSensor->SmoothedInputDevice;
LineSensor->SmoothedInputDevice;
DistanceSensor->SmoothedInputDevice;
OutputDevice->GPIODevice;
DigitalOutputDevice->OutputDevice;
LED->DigitalOutputDevice;
Buzzer->DigitalOutputDevice;
PWMOutputDevice->OutputDevice;
PWMLED->PWMOutputDevice;
RGBLED->Device;
}

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docs/images/input_device_hierarchy.svg Normal file
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@@ -0,0 +1,108 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<!-- Generated by graphviz version 2.36.0 (20140111.2315)
-->
<!-- Title: classes Pages: 1 -->
<svg width="453pt" height="332pt"
viewBox="0.00 0.00 453.00 332.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 328)">
<title>classes</title>
<polygon fill="white" stroke="none" points="-4,4 -4,-328 449,-328 449,4 -4,4"/>
<!-- Device -->
<g id="node1" class="node"><title>Device</title>
<polygon fill="#9ec6e0" stroke="#9ec6e0" points="335,-324 281,-324 281,-288 335,-288 335,-324"/>
<text text-anchor="middle" x="308" y="-303.5" font-family="Sans" font-size="10.00" fill="#000000">Device</text>
</g>
<!-- GPIODevice -->
<g id="node2" class="node"><title>GPIODevice</title>
<polygon fill="#9ec6e0" stroke="#9ec6e0" points="344,-252 272,-252 272,-216 344,-216 344,-252"/>
<text text-anchor="middle" x="308" y="-231.5" font-family="Sans" font-size="10.00" fill="#000000">GPIODevice</text>
</g>
<!-- GPIODevice&#45;&gt;Device -->
<g id="edge1" class="edge"><title>GPIODevice&#45;&gt;Device</title>
<path fill="none" stroke="black" d="M308,-252.303C308,-260.017 308,-269.288 308,-277.888"/>
<polygon fill="black" stroke="black" points="304.5,-277.896 308,-287.896 311.5,-277.896 304.5,-277.896"/>
</g>
<!-- SmoothedInputDevice -->
<g id="node3" class="node"><title>SmoothedInputDevice</title>
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<text text-anchor="middle" x="228" y="-87.5" font-family="Sans" font-size="10.00" fill="#000000">SmoothedInputDevice</text>
</g>
<!-- InputDevice -->
<g id="node4" class="node"><title>InputDevice</title>
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<text text-anchor="middle" x="308" y="-159.5" font-family="Sans" font-size="10.00" fill="#ffffff">InputDevice</text>
</g>
<!-- SmoothedInputDevice&#45;&gt;InputDevice -->
<g id="edge4" class="edge"><title>SmoothedInputDevice&#45;&gt;InputDevice</title>
<path fill="none" stroke="black" d="M247.775,-108.303C257.754,-117.035 270.011,-127.76 280.857,-137.25"/>
<polygon fill="black" stroke="black" points="278.622,-139.945 288.452,-143.896 283.231,-134.677 278.622,-139.945"/>
</g>
<!-- InputDevice&#45;&gt;GPIODevice -->
<g id="edge2" class="edge"><title>InputDevice&#45;&gt;GPIODevice</title>
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<polygon fill="black" stroke="black" points="304.5,-205.896 308,-215.896 311.5,-205.896 304.5,-205.896"/>
</g>
<!-- DigitalInputDevice -->
<g id="node5" class="node"><title>DigitalInputDevice</title>
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<text text-anchor="middle" x="388" y="-87.5" font-family="Sans" font-size="10.00" fill="#ffffff">DigitalInputDevice</text>
</g>
<!-- DigitalInputDevice&#45;&gt;InputDevice -->
<g id="edge3" class="edge"><title>DigitalInputDevice&#45;&gt;InputDevice</title>
<path fill="none" stroke="black" d="M368.225,-108.303C358.246,-117.035 345.989,-127.76 335.143,-137.25"/>
<polygon fill="black" stroke="black" points="332.769,-134.677 327.548,-143.896 337.378,-139.945 332.769,-134.677"/>
</g>
<!-- Button -->
<g id="node6" class="node"><title>Button</title>
<polygon fill="#2980b9" stroke="#2980b9" points="445,-36 391,-36 391,-0 445,-0 445,-36"/>
<text text-anchor="middle" x="418" y="-15.5" font-family="Sans" font-size="10.00" fill="#ffffff">Button</text>
</g>
<!-- Button&#45;&gt;DigitalInputDevice -->
<g id="edge5" class="edge"><title>Button&#45;&gt;DigitalInputDevice</title>
<path fill="none" stroke="black" d="M410.584,-36.3034C407.206,-44.1868 403.13,-53.6958 399.377,-62.4536"/>
<polygon fill="black" stroke="black" points="396.053,-61.3255 395.33,-71.8957 402.487,-64.0829 396.053,-61.3255"/>
</g>
<!-- MotionSensor -->
<g id="node7" class="node"><title>MotionSensor</title>
<polygon fill="#2980b9" stroke="#2980b9" points="82.5,-36 -0.5,-36 -0.5,-0 82.5,-0 82.5,-36"/>
<text text-anchor="middle" x="41" y="-15.5" font-family="Sans" font-size="10.00" fill="#ffffff">MotionSensor</text>
</g>
<!-- MotionSensor&#45;&gt;SmoothedInputDevice -->
<g id="edge6" class="edge"><title>MotionSensor&#45;&gt;SmoothedInputDevice</title>
<path fill="none" stroke="black" d="M82.5014,-34.5353C109.086,-44.4869 143.895,-57.5168 172.8,-68.3368"/>
<polygon fill="black" stroke="black" points="171.763,-71.6859 182.356,-71.9139 174.217,-65.1302 171.763,-71.6859"/>
</g>
<!-- LightSensor -->
<g id="node8" class="node"><title>LightSensor</title>
<polygon fill="#2980b9" stroke="#2980b9" points="175,-36 101,-36 101,-0 175,-0 175,-36"/>
<text text-anchor="middle" x="138" y="-15.5" font-family="Sans" font-size="10.00" fill="#ffffff">LightSensor</text>
</g>
<!-- LightSensor&#45;&gt;SmoothedInputDevice -->
<g id="edge7" class="edge"><title>LightSensor&#45;&gt;SmoothedInputDevice</title>
<path fill="none" stroke="black" d="M160.247,-36.3034C171.582,-45.1193 185.53,-55.9679 197.819,-65.5258"/>
<polygon fill="black" stroke="black" points="195.966,-68.519 206.009,-71.8957 200.264,-62.9935 195.966,-68.519"/>
</g>
<!-- LineSensor -->
<g id="node9" class="node"><title>LineSensor</title>
<polygon fill="#2980b9" stroke="#2980b9" points="263,-36 193,-36 193,-0 263,-0 263,-36"/>
<text text-anchor="middle" x="228" y="-15.5" font-family="Sans" font-size="10.00" fill="#ffffff">LineSensor</text>
</g>
<!-- LineSensor&#45;&gt;SmoothedInputDevice -->
<g id="edge8" class="edge"><title>LineSensor&#45;&gt;SmoothedInputDevice</title>
<path fill="none" stroke="black" d="M228,-36.3034C228,-44.0173 228,-53.2875 228,-61.8876"/>
<polygon fill="black" stroke="black" points="224.5,-61.8956 228,-71.8957 231.5,-61.8957 224.5,-61.8956"/>
</g>
<!-- DistanceSensor -->
<g id="node10" class="node"><title>DistanceSensor</title>
<polygon fill="#2980b9" stroke="#2980b9" points="373,-36 281,-36 281,-0 373,-0 373,-36"/>
<text text-anchor="middle" x="327" y="-15.5" font-family="Sans" font-size="10.00" fill="#ffffff">DistanceSensor</text>
</g>
<!-- DistanceSensor&#45;&gt;SmoothedInputDevice -->
<g id="edge9" class="edge"><title>DistanceSensor&#45;&gt;SmoothedInputDevice</title>
<path fill="none" stroke="black" d="M302.782,-36.1239C290.077,-45.1069 274.336,-56.2375 260.577,-65.9659"/>
<polygon fill="black" stroke="black" points="258.456,-63.1791 252.311,-71.8102 262.497,-68.8947 258.456,-63.1791"/>
</g>
</g>
</svg>
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@@ -0,0 +1,25 @@
/* vim: set et sw=4 sts=4: */
digraph classes {
graph [rankdir=BT];
node [shape=rect, style=filled, fontname=Sans, fontsize=10];
edge [];
/* Abstract classes */
node [color="#9ec6e0", fontcolor="#000000"]
Device;
GPIODevice;
/* Concrete classes */
node [color="#2980b9", fontcolor="#ffffff"];
GPIODevice->Device;
OutputDevice->GPIODevice;
DigitalOutputDevice->OutputDevice;
LED->DigitalOutputDevice;
Buzzer->DigitalOutputDevice;
PWMOutputDevice->OutputDevice;
PWMLED->PWMOutputDevice;
RGBLED->Device;
}

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@@ -0,0 +1,98 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<!-- Generated by graphviz version 2.36.0 (20140111.2315)
-->
<!-- Title: classes Pages: 1 -->
<svg width="259pt" height="332pt"
viewBox="0.00 0.00 259.00 332.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 328)">
<title>classes</title>
<polygon fill="white" stroke="none" points="-4,4 -4,-328 255,-328 255,4 -4,4"/>
<!-- Device -->
<g id="node1" class="node"><title>Device</title>
<polygon fill="#9ec6e0" stroke="#9ec6e0" points="204,-324 150,-324 150,-288 204,-288 204,-324"/>
<text text-anchor="middle" x="177" y="-303.5" font-family="Sans" font-size="10.00" fill="#000000">Device</text>
</g>
<!-- GPIODevice -->
<g id="node2" class="node"><title>GPIODevice</title>
<polygon fill="#9ec6e0" stroke="#9ec6e0" points="172,-252 100,-252 100,-216 172,-216 172,-252"/>
<text text-anchor="middle" x="136" y="-231.5" font-family="Sans" font-size="10.00" fill="#000000">GPIODevice</text>
</g>
<!-- GPIODevice&#45;&gt;Device -->
<g id="edge1" class="edge"><title>GPIODevice&#45;&gt;Device</title>
<path fill="none" stroke="black" d="M146.135,-252.303C150.852,-260.356 156.562,-270.106 161.782,-279.018"/>
<polygon fill="black" stroke="black" points="158.908,-281.036 166.982,-287.896 164.948,-277.498 158.908,-281.036"/>
</g>
<!-- OutputDevice -->
<g id="node3" class="node"><title>OutputDevice</title>
<polygon fill="#2980b9" stroke="#2980b9" points="177,-180 95,-180 95,-144 177,-144 177,-180"/>
<text text-anchor="middle" x="136" y="-159.5" font-family="Sans" font-size="10.00" fill="#ffffff">OutputDevice</text>
</g>
<!-- OutputDevice&#45;&gt;GPIODevice -->
<g id="edge2" class="edge"><title>OutputDevice&#45;&gt;GPIODevice</title>
<path fill="none" stroke="black" d="M136,-180.303C136,-188.017 136,-197.288 136,-205.888"/>
<polygon fill="black" stroke="black" points="132.5,-205.896 136,-215.896 139.5,-205.896 132.5,-205.896"/>
</g>
<!-- DigitalOutputDevice -->
<g id="node4" class="node"><title>DigitalOutputDevice</title>
<polygon fill="#2980b9" stroke="#2980b9" points="129,-108 17,-108 17,-72 129,-72 129,-108"/>
<text text-anchor="middle" x="73" y="-87.5" font-family="Sans" font-size="10.00" fill="#ffffff">DigitalOutputDevice</text>
</g>
<!-- DigitalOutputDevice&#45;&gt;OutputDevice -->
<g id="edge3" class="edge"><title>DigitalOutputDevice&#45;&gt;OutputDevice</title>
<path fill="none" stroke="black" d="M88.573,-108.303C96.2022,-116.78 105.523,-127.136 113.876,-136.417"/>
<polygon fill="black" stroke="black" points="111.315,-138.804 120.606,-143.896 116.518,-134.121 111.315,-138.804"/>
</g>
<!-- LED -->
<g id="node5" class="node"><title>LED</title>
<polygon fill="#2980b9" stroke="#2980b9" points="54,-36 0,-36 0,-0 54,-0 54,-36"/>
<text text-anchor="middle" x="27" y="-15.5" font-family="Sans" font-size="10.00" fill="#ffffff">LED</text>
</g>
<!-- LED&#45;&gt;DigitalOutputDevice -->
<g id="edge4" class="edge"><title>LED&#45;&gt;DigitalOutputDevice</title>
<path fill="none" stroke="black" d="M38.3708,-36.3034C43.7185,-44.4411 50.2043,-54.311 56.1106,-63.2987"/>
<polygon fill="black" stroke="black" points="53.3432,-65.4607 61.76,-71.8957 59.1932,-61.6165 53.3432,-65.4607"/>
</g>
<!-- Buzzer -->
<g id="node6" class="node"><title>Buzzer</title>
<polygon fill="#2980b9" stroke="#2980b9" points="126,-36 72,-36 72,-0 126,-0 126,-36"/>
<text text-anchor="middle" x="99" y="-15.5" font-family="Sans" font-size="10.00" fill="#ffffff">Buzzer</text>
</g>
<!-- Buzzer&#45;&gt;DigitalOutputDevice -->
<g id="edge5" class="edge"><title>Buzzer&#45;&gt;DigitalOutputDevice</title>
<path fill="none" stroke="black" d="M92.573,-36.3034C89.6449,-44.1868 86.113,-53.6958 82.8601,-62.4536"/>
<polygon fill="black" stroke="black" points="79.554,-61.3027 79.353,-71.8957 86.116,-63.7401 79.554,-61.3027"/>
</g>
<!-- PWMOutputDevice -->
<g id="node7" class="node"><title>PWMOutputDevice</title>
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<text text-anchor="middle" x="199" y="-87.5" font-family="Sans" font-size="10.00" fill="#ffffff">PWMOutputDevice</text>
</g>
<!-- PWMOutputDevice&#45;&gt;OutputDevice -->
<g id="edge6" class="edge"><title>PWMOutputDevice&#45;&gt;OutputDevice</title>
<path fill="none" stroke="black" d="M183.427,-108.303C175.798,-116.78 166.477,-127.136 158.124,-136.417"/>
<polygon fill="black" stroke="black" points="155.482,-134.121 151.394,-143.896 160.685,-138.804 155.482,-134.121"/>
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<!-- PWMLED -->
<g id="node8" class="node"><title>PWMLED</title>
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<text text-anchor="middle" x="199" y="-15.5" font-family="Sans" font-size="10.00" fill="#ffffff">PWMLED</text>
</g>
<!-- PWMLED&#45;&gt;PWMOutputDevice -->
<g id="edge7" class="edge"><title>PWMLED&#45;&gt;PWMOutputDevice</title>
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<polygon fill="black" stroke="black" points="195.5,-61.8956 199,-71.8957 202.5,-61.8957 195.5,-61.8956"/>
</g>
<!-- RGBLED -->
<g id="node9" class="node"><title>RGBLED</title>
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<text text-anchor="middle" x="218" y="-231.5" font-family="Sans" font-size="10.00" fill="#ffffff">RGBLED</text>
</g>
<!-- RGBLED&#45;&gt;Device -->
<g id="edge8" class="edge"><title>RGBLED&#45;&gt;Device</title>
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<polygon fill="black" stroke="black" points="189.052,-277.498 187.018,-287.896 195.092,-281.036 189.052,-277.498"/>
</g>
</g>
</svg>
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10
gpiozero/devices.py
View File

@@ -264,7 +264,7 @@ class CompositeDevice(Device):
def __init__(self, *args, **kwargs):
self._all = ()
self._named = {}
self._tuple = None
self._namedtuple = None
self._order = kwargs.pop('_order', None)
if self._order is None:
self._order = sorted(kwargs.keys())
@@ -279,7 +279,7 @@ class CompositeDevice(Device):
if not isinstance(dev, Device):
raise CompositeDeviceBadDevice("%s doesn't inherit from Device" % dev)
self._named = kwargs
self._tuple = namedtuple('%sValue' % self.__class__.__name__, chain(
self._namedtuple = namedtuple('%sValue' % self.__class__.__name__, chain(
(str(i) for i in range(len(args))), self._order),
rename=True)
@@ -333,12 +333,12 @@ class CompositeDevice(Device):
return all(device.closed for device in self)
@property
def tuple(self):
return self._tuple
def namedtuple(self):
return self._namedtuple
@property
def value(self):
return self.tuple(*(device.value for device in self))
return self.namedtuple(*(device.value for device in self))
@property
def is_active(self):

17
gpiozero/input_devices.py
View File

@@ -66,10 +66,10 @@ class DigitalInputDevice(EventsMixin, InputDevice):
"""
Represents a generic input device with typical on/off behaviour.
This class extends :class:`WaitableInputDevice` with machinery to fire the
active and inactive events for devices that operate in a typical digital
manner: straight forward on / off states with (reasonably) clean
transitions between the two.
This class extends :class:`InputDevice` with machinery to fire the active
and inactive events for devices that operate in a typical digital manner:
straight forward on / off states with (reasonably) clean transitions
between the two.
:param float bouncetime:
Specifies the length of time (in seconds) that the component will
@@ -94,11 +94,10 @@ class SmoothedInputDevice(EventsMixin, InputDevice):
Represents a generic input device which takes its value from the mean of a
queue of historical values.
This class extends :class:`WaitableInputDevice` with a queue which is
filled by a background thread which continually polls the state of the
underlying device. The mean of the values in the queue is compared to a
threshold which is used to determine the state of the :attr:`is_active`
property.
This class extends :class:`InputDevice` with a queue which is filled by a
background thread which continually polls the state of the underlying
device. The mean of the values in the queue is compared to a threshold
which is used to determine the state of the :attr:`is_active` property.
.. note::

15
gpiozero/mixins.py
View File

@@ -29,7 +29,9 @@ from .exc import (
class ValuesMixin(object):
"""
Adds a :attr:`values` property to the class which returns an infinite
generator of readings from the :attr:`value` property.
generator of readings from the :attr:`value` property. There is rarely a
need to use this mixin directly as all base classes in GPIO Zero include
it.
.. note::
@@ -50,8 +52,10 @@ class ValuesMixin(object):
class SourceMixin(object):
"""
Adds a :attr:`source` property to the class which, given an iterable,
sets :attr:`value` to each member of that iterable until it is exhausted.
Adds a :attr:`source` property to the class which, given an iterable, sets
:attr:`value` to each member of that iterable until it is exhausted. This
mixin is generally included in novel output devices to allow their state to
be driven from another device.
.. note::
@@ -312,6 +316,11 @@ class EventsMixin(object):
class HoldMixin(EventsMixin):
"""
Extends :class:`EventsMixin` to add the :attr:`when_held` event and the
machinery to fire that event repeatedly (when :attr:`hold_repeat` is
``True``) at internals defined by :attr:`hold_time`.
"""
def __init__(self, *args, **kwargs):
super(HoldMixin, self).__init__(*args, **kwargs)
self._when_held = None

2
gpiozero/other_devices.py
View File

@@ -21,7 +21,7 @@ from .mixins import EventsMixin
class InternalDevice(EventsMixin, Device):
"""
Extends :class:`Device` to provide a basis for devices which have no
specific hardware representation. This are effectively pseudo-devices and
specific hardware representation. These are effectively pseudo-devices and
usually represent operating system services like the internal clock, file
systems or network facilities.
"""

2
gpiozero/spi_devices.py
View File

@@ -228,7 +228,7 @@ class MCP3001(MCP3xxx):
class MCP3002(MCP3xxx):
"""
The `MCP3002`_ is a 10-bit analog to digital converter with 2 channels
(0-3).
(0-1).
.. _MCP3002: http://www.farnell.com/datasheets/1599363.pdf
"""

114
gpiozero/tools.py
View File

@@ -28,7 +28,8 @@ def negated(values):
Returns the negation of the supplied values (``True`` becomes ``False``,
and ``False`` becomes ``True``). For example::
from gpiozero import Button, LED, negated
from gpiozero import Button, LED
from gpiozero.tools import negated
from signal import pause
led = LED(4)
@@ -45,7 +46,8 @@ def inverted(values):
Returns the inversion of the supplied values (1 becomes 0, 0 becomes 1,
0.1 becomes 0.9, etc.). For example::
from gpiozero import MCP3008, PWMLED, inverted
from gpiozero import MCP3008, PWMLED
from gpiozero.tools import inverted
from signal import pause
led = PWMLED(4)
@@ -57,36 +59,44 @@ def inverted(values):
yield 1 - v
def scaled(values, range_min, range_max, domain_min=0, domain_max=1):
def scaled(values, output_min, output_max, input_min=0, input_max=1):
"""
Returns *values* scaled from *range_min* to *range_max*, assuming that all
items in *values* lie between *domain_min* and *domain_max* (which default
to 0 and 1 respectively). For example, to control the direction of a motor
(which is represented as a value between -1 and 1) using a potentiometer
(which typically provides values between 0 and 1)::
Returns *values* scaled from *output_min* to *output_max*, assuming that
all items in *values* lie between *input_min* and *input_max* (which
default to 0 and 1 respectively). For example, to control the direction of
a motor (which is represented as a value between -1 and 1) using a
potentiometer (which typically provides values between 0 and 1)::
from gpiozero import Motor, MCP3008, scaled
from gpiozero import Motor, MCP3008
from gpiozero.tools import scaled
from signal import pause
motor = Motor(20, 21)
pot = MCP3008(channel=0)
motor.source = scaled(pot.values, -1, 1)
pause()
.. warning::
If *values* contains elements that lie outside *input_min* to
*input_max* (inclusive) then the function will not produce values that
lie within *output_min* to *output_max* (inclusive).
"""
domain_size = domain_max - domain_min
range_size = range_max - range_min
input_size = input_max - input_min
output_size = output_max - output_min
for v in values:
yield (((v - domain_min) / domain_size) * range_size) + range_min
yield (((v - input_min) / input_size) * output_size) + output_min
def clamped(values, range_min=0, range_max=1):
def clamped(values, output_min=0, output_max=1):
"""
Returns *values* clamped from *range_min* to *range_max*, i.e. any items
less than *range_min* will be returned as *range_min* and any items
larger than *range_max* will be returned as *range_max* (these default to
Returns *values* clamped from *output_min* to *output_max*, i.e. any items
less than *output_min* will be returned as *output_min* and any items
larger than *output_max* will be returned as *output_max* (these default to
0 and 1 respectively). For example::
from gpiozero import PWMLED, MCP3008, clamped
from gpiozero import PWMLED, MCP3008
from gpiozero.tools import clamped
from signal import pause
led = PWMLED(4)
@@ -95,19 +105,40 @@ def clamped(values, range_min=0, range_max=1):
pause()
"""
for v in values:
yield min(max(v, range_min), range_max)
yield min(max(v, output_min), output_max)
def quantized(values, steps, range_min=0, range_max=1):
def absoluted(values):
"""
Returns *values* with all negative elements negated (so that they're
positive). For example::
from gpiozero import PWMLED, Motor, MCP3008
from gpiozero.tools import absoluted, scaled
from signal import pause
led = PWMLED(4)
motor = Motor(22, 27)
pot = MCP3008(channel=0)
motor.source = scaled(pot.values, -1, 1)
led.source = absoluted(motor.values)
pause()
"""
for v in values:
yield abs(v)
def quantized(values, steps, output_min=0, output_max=1):
"""
Returns *values* quantized to *steps* increments. All items in *values* are
assumed to be between *range_min* and *range_max* (use :func:`scaled` to
assumed to be between *output_min* and *output_max* (use :func:`scaled` to
ensure this if necessary).
For example, to quantize values between 0 and 1 to 5 "steps" (0.0, 0.25,
0.5, 0.75, 1.0)::
from gpiozero import PWMLED, MCP3008, quantized
from gpiozero import PWMLED, MCP3008
from gpiozero.tools import quantized
from signal import pause
led = PWMLED(4)
@@ -115,25 +146,26 @@ def quantized(values, steps, range_min=0, range_max=1):
led.source = quantized(pot.values, 4)
pause()
"""
range_size = range_max - range_min
for v in scaled(values, 0, 1, range_min, range_max):
yield ((int(v * steps) / steps) * range_size) + range_min
output_size = output_max - output_min
for v in scaled(values, 0, 1, output_min, output_max):
yield ((int(v * steps) / steps) * output_size) + output_min
def conjunction(*values):
def all_values(*values):
"""
Returns the `logical conjunction`_ of all supplied values (the result is
only ``True`` if and only if all input values are simultaneously ``True``).
One or more *values* can be specified. For example, to light an
:class:`LED` only when *both* buttons are pressed::
from gpiozero import LED, Button, conjunction
from gpiozero import LED, Button
from gpiozero.tools import all_values
from signal import pause
led = LED(4)
btn1 = Button(20)
btn2 = Button(21)
led.source = conjunction(btn1.values, btn2.values)
led.source = all_values(btn1.values, btn2.values)
pause()
.. _logical conjunction: https://en.wikipedia.org/wiki/Logical_conjunction
@@ -142,20 +174,21 @@ def conjunction(*values):
yield all(v)
def disjunction(*values):
def any_values(*values):
"""
Returns the `logical disjunction`_ of all supplied values (the result is
``True`` if any of the input values are currently ``True``). One or more
*values* can be specified. For example, to light an :class:`LED` when
*any* button is pressed::
from gpiozero import LED, Button, conjunction
from gpiozero import LED, Button
from gpiozero.tools import any_values
from signal import pause
led = LED(4)
btn1 = Button(20)
btn2 = Button(21)
led.source = disjunction(btn1.values, btn2.values)
led.source = any_values(btn1.values, btn2.values)
pause()
.. _logical disjunction: https://en.wikipedia.org/wiki/Logical_disjunction
@@ -170,7 +203,8 @@ def averaged(*values):
specified. For example, to light a :class:`PWMLED` as the average of
several potentiometers connected to an :class:`MCP3008` ADC::
from gpiozero import MCP3008, PWMLED, averaged
from gpiozero import MCP3008, PWMLED
from gpiozero.tools import averaged
from signal import pause
pot1 = MCP3008(channel=0)
@@ -190,7 +224,8 @@ def queued(values, qsize):
determined by *qsize*) and begins yielding values only when the queue is
full. For example, to "cascade" values along a sequence of LEDs::
from gpiozero import LEDBoard, Button, queued
from gpiozero import LEDBoard, Button
from gpiozero.tools import queued
from signal import pause
leds = LEDBoard(5, 6, 13, 19, 26)
@@ -236,7 +271,8 @@ def random_values():
Provides an infinite source of random values between 0 and 1. For example,
to produce a "flickering candle" effect with an LED::
from gpiozero import PWMLED, random_values
from gpiozero import PWMLED
from gpiozero.tools import random_values
from signal import pause
led = PWMLED(4)
@@ -256,13 +292,14 @@ def sin_values():
that increments by one for each requested value. For example, to produce a
"siren" effect with a couple of LEDs::
from gpiozero import PWMLED, sin_values, scaled, inverted
from gpiozero import PWMLED
from gpiozero.tools import sin_values, scaled, inverted
from signal import pause
red = PWMLED(2)
blue = PWMLED(3)
red.source_delay = 0.1
blue.source_delay = 0.1
red.source_delay = 0.01
blue.source_delay = 0.01
red.source = scaled(sin_values(), 0, 1, -1, 1)
blue.source = inverted(red.values)
pause()
@@ -280,11 +317,14 @@ def cos_values():
counter that increments by one for each requested value. For example, to
produce a "siren" effect with a couple of LEDs::
from gpiozero import PWMLED, cos_values, scaled, inverted
from gpiozero import PWMLED
from gpiozero.tools import cos_values, scaled, inverted
from signal import pause
red = PWMLED(2)
blue = PWMLED(3)
red.source_delay = 0.01
blue.source_delay = 0.01
red.source = scaled(cos_values(), 0, 1, -1, 1)
blue.source = inverted(red.values)
pause()

4
tests/test_devices.py
View File

@@ -90,7 +90,7 @@ def test_composite_device_sequence():
assert len(device) == 2
assert device[0].pin.number == 2
assert device[1].pin.number == 3
assert device.tuple._fields == ('_0', '_1')
assert device.namedtuple._fields == ('_0', '_1')
def test_composite_device_values():
with CompositeDevice(
@@ -109,7 +109,7 @@ def test_composite_device_named():
bar=InputDevice(MockPin(3)),
_order=('foo', 'bar')
) as device:
assert device.tuple._fields == ('foo', 'bar')
assert device.namedtuple._fields == ('foo', 'bar')
assert device.value == (0, 0)
assert not device.is_active

19
tests/test_tools.py
View File

@@ -33,21 +33,24 @@ def test_scaled():
def test_clamped():
assert list(clamped((-1, 0, 1, 2))) == [0, 0, 1, 1]
def test_absoluted():
assert list(absoluted((-2, -1, 0, 1, 2))) == [2, 1, 0, 1, 2]
def test_quantized():
assert list(quantized((0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1), 4)) == [
0.0, 0.0, 0.0, 0.25, 0.25, 0.5, 0.5, 0.5, 0.75, 0.75, 1.0]
assert list(quantized((0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1), 5)) == [
0.0, 0.0, 0.2, 0.2, 0.4, 0.4, 0.6, 0.6, 0.8, 0.8, 1.0]
def test_conjunction():
assert list(conjunction(())) == []
assert list(conjunction((False, True))) == [False, True]
assert list(conjunction((0, 1, 0, 1), (0, 0, 0, 1))) == [0, 0, 0, 1]
def test_all_values():
assert list(all_values(())) == []
assert list(all_values((False, True))) == [False, True]
assert list(all_values((0, 1, 0, 1), (0, 0, 0, 1))) == [0, 0, 0, 1]
def test_disjunction():
assert list(disjunction(())) == []
assert list(disjunction((False, True))) == [False, True]
assert list(disjunction((0, 1, 0, 1), (0, 0, 0, 1))) == [0, 1, 0, 1]
def test_any_values():
assert list(any_values(())) == []
assert list(any_values((False, True))) == [False, True]
assert list(any_values((0, 1, 0, 1), (0, 0, 0, 1))) == [0, 1, 0, 1]
def test_averaged():
assert list(averaged(())) == []