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