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:
4:d911d7c4e09d
Parent:
2:72ac4d7044a7
Child:
5:8a73e34b3978
diff -r 20f8faf2ad18 -r d911d7c4e09d GPS.cpp
--- a/GPS.cpp	Mon Feb 15 00:42:32 2016 +0000
+++ b/GPS.cpp	Mon Feb 15 05:26:36 2016 +0000
@@ -3,6 +3,8 @@
 
 GPS::GPS(PinName tx, PinName rx) : RawSerial(tx, rx)
 {
+    _gpsTimer.start();
+    _gpsTimer.reset();
     RxQueueSize=0;
     RxQueueWriteIndex=0;
     RxQueueReadIndex=0;
@@ -53,21 +55,30 @@
     {
         GPSRMCMessage.MessageIsNew = 0;
         DecodeMessage(GPSRMCMessage,info);
+        _gpsTimer.reset();
     }
     if(GPSGGAMessage.MessageIsNew > 0)
     {
         GPSGGAMessage.MessageIsNew = 0;
         DecodeMessage(GPSGGAMessage,info);
+        _gpsTimer.reset();
     }
     if(GPSVTGMessage.MessageIsNew > 0)
     {
         GPSVTGMessage.MessageIsNew = 0;
         DecodeMessage(GPSVTGMessage,info);
+        _gpsTimer.reset();
     }
     if(GPSGSAMessage.MessageIsNew > 0)
     {
         GPSGSAMessage.MessageIsNew = 0;
         DecodeMessage(GPSGSAMessage,info);
+        _gpsTimer.reset();
+    }
+    
+    if(_gpsTimer.read_ms() > 5000)
+    {
+        info.fix = 1;
     }
 }