christian b / GPS

Mbed library to handle GPS data reception and parsing

Dependents:   GPS_U-blox_NEO-6M_Code

Features

  • All positionning parameters are contained into a global data structure.
  • Automatic nema string parsing and data structure update.
    • GSA,GGA,VTG and RMC
  • Convert latitude and longitude to decimal value.
  • Converts latittude,longitude and altitude to ECEF coordinates.

Planed developement

  • Test library for RTOS use.
  • Complete the nema parsing decoders (couple of parameters are not parsed yet and not present in the data structure).
  • Add conversion tool to get ENU coordinates.

Diff: GPS.cpp

Revision:
5:8a73e34b3978
Parent:
4:d911d7c4e09d
diff -r d911d7c4e09d -r 8a73e34b3978 GPS.cpp
--- a/GPS.cpp	Mon Feb 15 05:26:36 2016 +0000
+++ b/GPS.cpp	Tue Feb 16 02:57:35 2016 +0000
@@ -49,7 +49,7 @@
             RxMessageBuffer.data[(insertIndex++)%RX_BUFFER_SIZE] = in;
     }
 }
-void GPS::PumpGpsMessages(void)
+void GPS::UpdateGPS(void)
 {
     if(GPSRMCMessage.MessageIsNew > 0)
     {
@@ -88,11 +88,13 @@
 }
 ECEFDistance GPS::DistanceBetweenTwoWP(ECEFPoint p1,ECEFPoint p2)
 {
+    
     return DistanceBetweenTwoECEFPoints(p1,p2);
 }
 
 geodPoint   GPS::ReadDecGeodLoc(void){
     geodPoint newLoc;
+    UpdateGPS();
     newLoc.latitude = nmea_to_dec(info.latitude,info.latLoc);
     newLoc.longitude = nmea_to_dec(info.longitude,info.lonLoc);
     newLoc.altitude = info.GPSAltitude;
@@ -101,6 +103,7 @@
     
 geodPoint   GPS::ReadRawGeodLoc(void){
     geodPoint newLoc;
+    UpdateGPS();
     newLoc.latitude = info.latitude;
     newLoc.longitude = info.longitude;
     newLoc.altitude = info.GPSAltitude;
@@ -109,12 +112,15 @@
     
     
 bool    GPS::FixIs3d(void){
+    UpdateGPS();
     return (info.fix == 3);
     }
 bool    GPS::FixIs2d(void){
+    UpdateGPS();
     return (FixIs3d() || (info.fix == 2));
     }
 bool    GPS::GPSFixValid(void){
+        UpdateGPS();
         return (info.GPSStatus == 'A');
     }