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33 lines
1.2 KiB
33 lines
1.2 KiB
.. include:: <isonum.txt> |
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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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