GPS.h

00001 /* GPS class for mbed Microcontroller
00002  * Copyright (c) 2008, sford
00003  */
00004 
00005 #include "mbed.h"
00006 
00007 #ifndef GPS_H
00008 #define GPS_H
00009 
00010 /* Class: GPS
00011  *  A GPS interface for reading from a Globalsat EM-406 GPS Module
00012  */
00013 class GPS {
00014 
00015 public:
00016 
00017     /* Constructor: GPS
00018      *  Create the GPS, connected to the specified serial port
00019      */ 
00020     GPS(PinName tx, PinName rx);
00021     
00022     /* Function: sample
00023      *  Sample the incoming GPS data, returning whether there is a lock
00024      * 
00025      * Variables:
00026      *  returns - 1 if there was a lock when the sample was taken (and therefore .longitude and .latitude are valid), else 0
00027      */
00028     int sample();
00029     
00030     /* Variable: longitude
00031      *  The longitude (call sample() to set)
00032      */
00033     float longitude;
00034 
00035     /* Variable: latitude
00036      *  The latitude (call sample() to set)
00037      */
00038     float latitude;
00039     
00040 private:
00041 
00042     float trunc(float v);
00043     void getline();
00044     
00045     Serial _gps;
00046     char msg[256];
00047 
00048 };
00049 
00050 #endif