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.

Files at this revision

API Documentation at this revision

Revision 4:d911d7c4e09d, committed 2016-02-15

Comitter:
chris215
Date:
Mon Feb 15 05:26:36 2016 +0000
Parent:
3:20f8faf2ad18
Child:
5:8a73e34b3978
Commit message:
Added gps message reception timeout.

Changed in this revision

Decoders/GPVTGdecoder.hpp Show annotated file Show diff for this revision Revisions of this file
GPS.cpp Show annotated file Show diff for this revision Revisions of this file
GPS.h Show annotated file Show diff for this revision Revisions of this file 
--- a/Decoders/GPVTGdecoder.hpp	Mon Feb 15 00:42:32 2016 +0000
+++ b/Decoders/GPVTGdecoder.hpp	Mon Feb 15 05:26:36 2016 +0000
@@ -2,7 +2,8 @@
 #include "DecodersUtils.h"
 #include "mbedGPSDefs.h"
 
-
+#include "USBSerial.h"
+extern USBSerial  pc;          // Virtual serial port over USB
 
 void DecodeGPVTG(char * tokenStr,GPSInfo& data)
 {

--- 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;
     }
 }
 

--- a/GPS.h	Mon Feb 15 00:42:32 2016 +0000
+++ b/GPS.h	Mon Feb 15 05:26:36 2016 +0000
@@ -39,6 +39,7 @@
     uint32_t RxQueueWriteIndex;
     uint32_t RxQueueReadIndex;
     char insertIndex;
+    Timer _gpsTimer;
 };
 
 #endif
\ No newline at end of file