examples/read_nmea.cpp

   1 #include <marnav-io/default_nmea_reader.hpp>
   2 #include <marnav-io/default_nmea_serial.hpp>
   3 #include <marnav/nmea/nmea.hpp>
   4 #include <marnav/nmea/rmc.hpp>
   5 #include <marnav/nmea/io.hpp>
   6 #include <iostream>
   7
   8 int main(int, char **)
   9 {
  10         using namespace marnav;
  11         using namespace marnav::io;
  12
  13         // create and open the device for reading.
  14         default_nmea_reader reader{make_default_nmea_serial("/dev/ttyUSB0")};
  15
  16         std::string data;
  17
  18         // read and process NMEA sentences, bus synchronization is done automatically.
  19         while (reader.read_sentence(data)) {
  20                 // data was successfully read from the NMEA bus, inclusive synchronization
  21                 // of NMEA sentences. This means it is possible to begin to listen on the
  22                 // bus at any time.
  23                 auto sentence = nmea::make_sentence(data);
  24
  25                 // do something with the sentence, for example dump the position
  26                 if (sentence->id() == nmea::sentence_id::RMC) {
  27                         auto rmc = nmea::sentence_cast<nmea::rmc>(sentence.get());
  28                         std::cout << "latitude : " << nmea::to_string(rmc->get_lat()) << "\n";
  29                         std::cout << "longitude: " << nmea::to_string(rmc->get_lon()) << "\n";
  30                 }
  31         }
  32 }