Improved, thread compatible. Adds new features
Fork of GroveGPS by
Diff: GroveGPS.h
- Revision:
- 1:403eb5e9e994
- Parent:
- 0:56d6407653a7
- Child:
- 2:073674e3f5bf
--- a/GroveGPS.h Tue Jan 30 13:04:53 2018 -0600 +++ b/GroveGPS.h Sat Apr 14 00:03:58 2018 +0000 @@ -35,13 +35,61 @@ char geoid_separation_units; long age_of_diff; long diff_ref_station_id; + int new_flag; std::string checksum; } gps_gga; + + struct ZDA { + double utc_time; // Format: hhmmss.sss + int day; + int month; + int year; + int new_flag; + std::string checksum; + } gps_zda; + struct VTG { + double course1; + int truec; + double course2; + int magnetic; + double speed1; + int knots; + double speed2; + int kmh; + int new_flag; + std::string checksum; + } gps_vtg; + + + void getAltitude(char* buffer) { + if (gps_gga.position_fix==0) + sprintf(buffer, "N/A"); + else + sprintf(buffer, "%f", gps_gga.msl_altitude); + } + + void getCourse(char* buffer) { + if (gps_gga.position_fix==0) + sprintf(buffer, "N/A"); + else + sprintf(buffer, "%f", gps_vtg.course1); + } + + void getSpeed(char* buffer) { + if (gps_gga.position_fix==0) + sprintf(buffer, "N/A"); + else + sprintf(buffer, "%f", gps_vtg.speed1); + } + void getTimestamp(char* buffer) { - sprintf(buffer, "%f", gps_gga.utc_time); + if (gps_gga.position_fix==0) + sprintf(buffer, "N/A"); + else + sprintf(buffer, "%f", gps_gga.utc_time); } - + void getLatitude(char* buffer) { double coordinate = convertGPSToDecimal(gps_gga.latitude); if (gps_gga.position_fix==0) @@ -61,6 +109,7 @@ private: std::string _last_line; + double convertGPSToDecimal(double coordinate) { int degrees = coordinate/100.0; int minutes = ((int)coordinate) % 100; @@ -73,6 +122,50 @@ if (_last_line.find("GPGGA") != std::string::npos) { parseGGA(); } + if (_last_line.find("GPZDA") != std::string::npos) { + parseZDA(); + } + if (_last_line.find("GPVTG") != std::string::npos) { + parseVTG(); + } + } + +void parseVTG() { + char* pEnd; + for (int i=0; i<5; i++) { + std::string current_item = _last_line.substr(0,_last_line.find(",")); + _last_line = _last_line.substr(_last_line.find(",")+1); + if (i==0) { // NMEA Tag + } else if (i==1) { // UTC time + gps_vtg.course1 = strtod(current_item.c_str(), &pEnd); + } else if (i==3) { + gps_vtg.course2 = strtod(current_item.c_str(), &pEnd); + } else if (i==5) { + gps_vtg.speed1 = strtod(current_item.c_str(), &pEnd); + } else if (i==7) { + gps_vtg.speed2 = strtod(current_item.c_str(), &pEnd); + } + } + gps_vtg.new_flag = 1; + } + +void parseZDA() { + char* pEnd; + for (int i=0; i<5; i++) { + std::string current_item = _last_line.substr(0,_last_line.find(",")); + _last_line = _last_line.substr(_last_line.find(",")+1); + if (i==0) { // NMEA Tag + } else if (i==1) { // UTC time + gps_zda.utc_time = strtod(current_item.c_str(), &pEnd); + } else if (i==2) { + gps_zda.day = strtod(current_item.c_str(), &pEnd); + } else if (i==3) { + gps_zda.month = strtod(current_item.c_str(), &pEnd); + } else if (i==4) { + gps_zda.year = strtod(current_item.c_str(), &pEnd); + } + } + gps_zda.new_flag = 1; } void parseGGA() { @@ -93,9 +186,17 @@ gps_gga.ew_indicator = current_item[0]; } else if (i==6) { gps_gga.position_fix = strtod(current_item.c_str(), &pEnd); + }else if (i==7) { + gps_gga.sats_used = strtod(current_item.c_str(), &pEnd); + } else if (i==8) { + gps_gga.hdop = strtod(current_item.c_str(), &pEnd); + } else if (i==9) { + gps_gga.msl_altitude = strtod(current_item.c_str(), &pEnd); } } + gps_gga.new_flag = 1; } + }; #endif \ No newline at end of file