Keith G / Mbed 2 deprecated compass_test

Initial import

Dependencies:   HMC5883L mbed

gps_utils.h@3:af291e8853b1, 2016-03-24 (annotated)

Committer:
Condo2k4
Date:
Thu Mar 24 16:40:18 2016 +0000
Revision:
3:af291e8853b1
Parent:
2:3a288d8c816b 
Compass Calibration

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Condo2k4 2:3a288d8c816b 1 #ifndef __gps_utils_h__
Condo2k4 2:3a288d8c816b 2 #define __gps_utils_h__
Condo2k4 2:3a288d8c816b 3
Condo2k4 2:3a288d8c816b 4 #include <math.h>
Condo2k4 2:3a288d8c816b 5
Condo2k4 2:3a288d8c816b 6 #ifndef M_PI
Condo2k4 2:3a288d8c816b 7 #define M_PI 3.14159265358979323846
Condo2k4 2:3a288d8c816b 8 #endif
Condo2k4 2:3a288d8c816b 9
Condo2k4 2:3a288d8c816b 10 #define TWO_PI (M_PI+M_PI)
Condo2k4 2:3a288d8c816b 11
Condo2k4 2:3a288d8c816b 12 #define EARTH_RADIUS_METERS 6371000
Condo2k4 2:3a288d8c816b 13
Condo2k4 2:3a288d8c816b 14 //Functions extracted from http://movable-type.co.uk/scripts/latlong.html
Condo2k4 2:3a288d8c816b 15
Condo2k4 2:3a288d8c816b 16 //
Condo2k4 2:3a288d8c816b 17 // Calculate the distance between two points on earth using the haversine function.
Condo2k4 2:3a288d8c816b 18 // Most accurate and expensive distance calculating function in this library.
Condo2k4 2:3a288d8c816b 19 // lat and lon values expected in radians.
Condo2k4 2:3a288d8c816b 20 // Returns distance in meters
Condo2k4 2:3a288d8c816b 21 //
Condo2k4 2:3a288d8c816b 22 double haversine(double lat1, double lon1, double lat2, double lon2);
Condo2k4 2:3a288d8c816b 23
Condo2k4 2:3a288d8c816b 24 //
Condo2k4 2:3a288d8c816b 25 // Calculate the distance between two points on earth using the spherical law of cosines.
Condo2k4 2:3a288d8c816b 26 // Less expencive than haversine, but not good at small distances.
Condo2k4 2:3a288d8c816b 27 // lat and lon values expected in radians.
Condo2k4 2:3a288d8c816b 28 // Returns distance in meters
Condo2k4 2:3a288d8c816b 29 //
Condo2k4 2:3a288d8c816b 30 double cosines(double lat1, double lon1, double lat2, double lon2);
Condo2k4 2:3a288d8c816b 31
Condo2k4 2:3a288d8c816b 32 //
Condo2k4 2:3a288d8c816b 33 // Calculate the distance between two points on earth using equirectangular approximation.
Condo2k4 2:3a288d8c816b 34 // Least accurate and expensive distance calculating function, suitable only for small distances.
Condo2k4 2:3a288d8c816b 35 // lat and lon values expected in radians.
Condo2k4 2:3a288d8c816b 36 // Returns distance in meters
Condo2k4 2:3a288d8c816b 37 //
Condo2k4 2:3a288d8c816b 38 double equirectangular(double lat1, double lon1, double lat2, double lon2);
Condo2k4 2:3a288d8c816b 39
Condo2k4 2:3a288d8c816b 40 //
Condo2k4 2:3a288d8c816b 41 // Calculates the inital bearing a journey requires if traveling from lat1,lon1 to lat2,lon2.
Condo2k4 2:3a288d8c816b 42 // (Bearing can naturally change as one travels along the sphere)
Condo2k4 2:3a288d8c816b 43 // lat and lon values expected in radians.
Condo2k4 2:3a288d8c816b 44 // Returns bearing in the range 0-2*PI
Condo2k4 2:3a288d8c816b 45 //
Condo2k4 2:3a288d8c816b 46 double startBearing(double lat1, double lon1, double lat2, double lon2);
Condo2k4 2:3a288d8c816b 47
Condo2k4 2:3a288d8c816b 48 //
Condo2k4 2:3a288d8c816b 49 // Calculates the bearing a journey will end on if traveling from lat1,lon1 to lat2,lon2.
Condo2k4 2:3a288d8c816b 50 // (Bearing can naturally change as one travels along the sphere)
Condo2k4 2:3a288d8c816b 51 // lat and lon values expected in radians.
Condo2k4 2:3a288d8c816b 52 // Returns bearing in the range 0-2*PI
Condo2k4 2:3a288d8c816b 53 //
Condo2k4 2:3a288d8c816b 54 double endBearing(double lat1, double lon1, double lat2, double lon2);
Condo2k4 2:3a288d8c816b 55
Condo2k4 2:3a288d8c816b 56 #endif //__gps_utils_h__