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