32b/svgen.h

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#ifndef _SVGEN_H_
#define _SVGEN_H_



// **************************************************************************
// the includes

#include "sw/modules/iqmath/src/32b/IQmathLib.h"
#include "sw/modules/types/src/types.h"
#include "sw/modules/math/src/32b/math.h"



// Include the algorithm overview defined in modules/<module>/docs/doxygen/doxygen.h


#ifdef __cplusplus
extern "C" {
#endif


// **************************************************************************
// the defines

#define SVGEN_MAX_VAB_VOLTAGES                _IQ(1.1547005384)

#define SVGEN_100_PERCENT_MODULATION          _IQ(1.0 - 1.0/32768)

#define SVGEN_SQRT3_OVER_2                    _IQ(0.8660254038)   

#define SVGEN_4_OVER_3                        _IQ(4.0/3.0)

// **************************************************************************
// the typedefs

typedef struct _SVGEN_Obj_
{
  _iq   maxModulation;        
} SVGEN_Obj;


typedef struct _SVGEN_Obj_ *SVGEN_Handle;


// **************************************************************************
// the function prototypes

static inline _iq SVGEN_getMaxModulation(SVGEN_Handle handle)
{
  SVGEN_Obj *obj = (SVGEN_Obj *)handle;

  return(obj->maxModulation);
} // end of SVGEN_getMaxModulation() function


extern SVGEN_Handle SVGEN_init(void *pMemory,const size_t numBytes);


static inline void SVGEN_run(SVGEN_Handle handle,const MATH_vec2 *pVab,MATH_vec3 *pT)
{

  _iq Vmax,Vmin,Vcom;
  _iq Va,Vb,Vc;
  _iq Va_tmp = -(pVab->value[0]>>1);
  _iq Vb_tmp = _IQmpy(SVGEN_SQRT3_OVER_2,pVab->value[1]);
  
  Va = pVab->value[0];  //alpha
  Vb = Va_tmp + Vb_tmp; //-0.5*alpha + sqrt(3)/2 * beta;
  Vc = Va_tmp - Vb_tmp; //-0.5*alpha - sqrt(3)/2 * beta;
        
  Vmax=0;
  Vmin=0;

  // find order Vmin,Vmid,Vmax
  if (Va > Vb)                  
  {
    Vmax = Va;
    Vmin = Vb;
  }
  else
  {
    Vmax = Vb;
    Vmin = Va;
  }

  if (Vc > Vmax)
  {
    Vmax = Vc;
  }
  else if (Vc < Vmin)
  {
    Vmin = Vc;
  }
                
  Vcom = _IQmpy(Vmax+Vmin, _IQ(0.5));

  // Subtract common-mode term to achieve SV modulation
  pT->value[0] = (Va - Vcom);
  pT->value[1] = (Vb - Vcom);
  pT->value[2] = (Vc - Vcom);
  
  return;
} // end of SVGEN_run() function


static inline void SVGEN_setMaxModulation(SVGEN_Handle handle,const _iq maxModulation)
{
  SVGEN_Obj *obj = (SVGEN_Obj *)handle;
  _iq maxMod = maxModulation;

  if(maxMod > SVGEN_4_OVER_3)
      maxMod = SVGEN_4_OVER_3;
  else if(maxMod < _IQ(0.0))
      maxMod = _IQ(0.0);

  obj->maxModulation = maxMod;

  return;
} // end of SVGEN_setMaxModulation() function


#ifdef __cplusplus
}
#endif // extern "C"

#endif // end of _SVGEN_H_ definition