This lib is considered to be used as a sensor's calibration program. Calibration with Spline Interpolation might be useful in the case that you want some model expressing relationship such like between a value of physical quantity and your sensor's voltage, but you cannot estimate a model such as liner, square, cubic polynomial, or sine curve. This makes (Parametric) Cubic Spline Polynomial Model (Coefficients of the polynomial) from some sample plots(e.g. sets of (value, voltage)). The inverse function (x,y)->(y,x) has been implemented so as to get analog data (not stepping or leveled data).
Fork of TRP105F_Spline by
CubicSpline.h
- Committer:
- aktk
- Date:
- 2016-05-12
- Revision:
- 3:75f50dbedf1b
- Child:
- 4:8db89b731133
File content as of revision 3:75f50dbedf1b:
/** * Spline_Cubic.h,.cpp * * Author: aktk, aktk.j.uec@gmail.com * Tokyo, Japan. * * LOG: * ver.0 2016/02.12 - 2016/02/16 * TRP105F_Spline.h,.cpp(Ver.2.1) * ver.1 2016/05.12 */ #ifndef Cubic_Spline_H #define Cubic_Spline_H #include "mbed.h" // Vector Element Type typedef struct { unsigned short x; // unsigned short y; // distance } Vector2d; enum UseType{ AsDEBUG, AsMODULE }; class Spline_2dCubic { public: // Constraction Spline_2dCubic(); Spline_2dCubic(unsigned int); Spline_2dCubic(unsigned int arg_NumSample, UseType arg_dit); // Destraction ~Spline_2dCubic(); // Functions unsigned short getX(); unsigned short getY(); void calibrateSensor(); void saveSetting(); void saveSetting(const char *filename); void loadSetting(); void loadSetting(const char *filename); void printOutData(); void printThresholds(); private: // // Variables // unsigned int _Sample_Num; // the number of samples for derive spline Vector2d* _Sample_Set; UseType _useType; double* _u_param; // // For calibration // void _sampleData(); void _makeSpline(); // Cubic spline unsigned short _getSplineYof(double); // // For get distance // int _getNearest(int, int, unsigned short); // // For debug // void _printOutData(unsigned short *arg, int num, char* name); void _printOutData(VDset *arg, int num, char* name); void _printOutData(double *arg, int num, char* name); }; #endif