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#ifndef _MM3_H

#define _MM3_H

#include <inttypes.h>

typedef struct

{

  int16_t X_off;

  int16_t Y_off;

  int16_t Z_off;

  int16_t X_range;

  int16_t Y_range;

  int16_t Z_range;

} MM3_calib_t;

extern MM3_calib_t MM3_calib;

// Initialization of the MM3 communication

void MM3_Init(void);

// should be called cyclic to get actual compass reading

void MM3_Update(void);

// this function calibrates the MM3

// and returns immediately if the communication to the MM3-Board is broken.

void MM3_Calibrate(void);

// calculates the current compass heading in a range from 0 to 360 deg.

// returns -1 if no compass data are available

int16_t MM3_Heading(void);

#endif //_MM3_H