51 lines
1.4 KiB
ReStructuredText
51 lines
1.4 KiB
ReStructuredText
.. _gnss_api:
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GNSS (Global Navigation Satellite System)
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#########################################
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Overview
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********
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GNSS is a general term which covers satellite systems used for
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navigation, like GPS (Global Positioning System). GNSS services
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are usually accessed through GNSS modems which receive and
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process GNSS signals to determine their position, or more
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specifically, their antennas position. They usually
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additionally provide a precise time synchronization mechanism,
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commonly named PPS (Pulse-Per-Second).
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Subsystem support
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*****************
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The GNSS subsystem is based on the :ref:`modem`. The GNSS
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subsystem covers everything from sending and receiving commands
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to and from the modem, to parsing, creating and processing
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NMEA0183 messages.
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Adding support for additional NMEA0183 based GNSS modems
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requires little more than implementing power management
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and configuration for the specific GNSS modem.
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Adding support for GNSS modems which use other protocols and/or
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buses than the usual NMEA0183 over UART is possible, but will
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require a bit more work from the driver developer.
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Configuration Options
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*********************
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Related configuration options:
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* :kconfig:option:`CONFIG_GNSS`
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* :kconfig:option:`CONFIG_GNSS_SATELLITES`
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* :kconfig:option:`CONFIG_GNSS_DUMP_TO_LOG`
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Navigation Reference
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********************
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.. doxygengroup:: navigation
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GNSS API Reference
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******************
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.. doxygengroup:: gnss_interface
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