examples/read_nmea.cpp

   1 #include <iostream>
   2 #include <marnav/io/default_nmea_reader.hpp>
   3 #include <marnav/io/default_nmea_serial.hpp>
   4 #include <marnav/nmea/nmea.hpp>
   5 #include <marnav/nmea/rmc.hpp>
   6 #include <marnav/nmea/io.hpp>
   7 #include <marnav/utils/unique.hpp>
   8
   9 int main(int, char **)
  10 {
  11         using namespace marnav;
  12         using namespace marnav::io;
  13
  14         // create and open the device for reading.
  15         default_nmea_reader reader{make_default_nmea_serial("/dev/ttyUSB0")};
  16
  17         std::string data;
  18
  19         // read and process NMEA sentences, bus synchronization is done automatically.
  20         while (reader.read_sentence(data)) {
  21                 // data was successfully read from the NMEA bus, inclusive synchronization
  22                 // of NMEA sentences. This means it is possible to begin to listen on the
  23                 // bus at any time.
  24                 auto sentence = nmea::make_sentence(data);
  25
  26                 // do something with the sentence, for example dump the position
  27                 if (sentence->id() == nmea::sentence_id::RMC) {
  28                         auto rmc = nmea::sentence_cast<nmea::rmc>(sentence.get());
  29                         std::cout << "latitude : " << nmea::to_string(rmc->get_latitude()) << "\n";
  30                         std::cout << "longitude: " << nmea::to_string(rmc->get_longitude()) << "\n";
  31                 }
  32         }
  33 }