34 lines
1.2 KiB
ReStructuredText
34 lines
1.2 KiB
ReStructuredText
|
.. include:: <isonum.txt>
|
||
|
|
|
||
|
|
============
|
||
|
|
Introduction
|
||
|
|
============
|
||
|
|
|
||
|
|
The main purpose of the Industrial I/O subsystem (IIO) is to provide support
|
||
|
|
for devices that in some sense perform either
|
||
|
|
analog-to-digital conversion (ADC) or digital-to-analog conversion (DAC)
|
||
|
|
or both. The aim is to fill the gap between the somewhat similar hwmon and
|
||
|
|
:doc:`input <../input>` subsystems. Hwmon is directed at low sample rate
|
||
|
|
sensors used to monitor and control the system itself, like fan speed control
|
||
|
|
or temperature measurement. :doc:`Input <../input>` is, as its name suggests,
|
||
|
|
focused on human interaction input devices (keyboard, mouse, touchscreen).
|
||
|
|
In some cases there is considerable overlap between these and IIO.
|
||
|
|
|
||
|
|
Devices that fall into this category include:
|
||
|
|
|
||
|
|
* analog to digital converters (ADCs)
|
||
|
|
* accelerometers
|
||
|
|
* capacitance to digital converters (CDCs)
|
||
|
|
* digital to analog converters (DACs)
|
||
|
|
* gyroscopes
|
||
|
|
* inertial measurement units (IMUs)
|
||
|
|
* color and light sensors
|
||
|
|
* magnetometers
|
||
|
|
* pressure sensors
|
||
|
|
* proximity sensors
|
||
|
|
* temperature sensors
|
||
|
|
|
||
|
|
Usually these sensors are connected via :doc:`SPI <../spi>` or
|
||
|
|
:doc:`I2C <../i2c>`. A common use case of the sensors devices is to have
|
||
|
|
combined functionality (e.g. light plus proximity sensor).
|