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extern MM3_calib_t MM3_calib;
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extern MM3_calib_t MM3_calib;
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// Initialization of the MM3 communication
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// Initialization of the MM3 communication
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void MM3_Init(void);
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void MM3_Init(void);
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// should be called cyclic to get actual compass reading
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// should be called cyclic to get actual compass reading
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void MM3_Update(void);
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void MM3_Update(void);
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// this function calibrates the MM3
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// this function calibrates the MM3
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// and returns immediately if the communication to the MM3-Board is broken.
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// and returns immediately if the communication to the MM3-Board is broken.
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void MM3_Calibrate(void);
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void MM3_Calibrate(void);
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// calculates the current compass heading in a range from 0 to 360 deg.
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// calculates the current compass heading in a range from 0 to 360 deg.
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// returns -1 of no compass data are available
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// returns -1 if no compass data are available