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#ifndef IIRFILTER__H__
#define IIRFILTER__H__
__BEGIN_DECLS
#define MAX_LENGTH 4
typedef struct FILTER_s
{
float denData[MAX_LENGTH];
float numData[MAX_LENGTH];
int denLength;
int numLength;
float Ts;
float inpData[MAX_LENGTH];
float outData[MAX_LENGTH];
unsigned int inpCnt;
} FIL_T;
typedef struct TF_ZPG_s
{
int zerosLength;
double zerosData[MAX_LENGTH + 1];
int polesLength;
double polesData[MAX_LENGTH + 1];
double gain;
double Ts;
} TF_ZPG_t;
typedef struct TF_POLY_s
{
int numLength;
double numData[MAX_LENGTH];
int denLength;
double denData[MAX_LENGTH];
double Ts;
} TF_POLY_t;
typedef struct TF_DIF_s
{
int numInt;
int numDiff;
int lowpassLength;
int highpassLength;
double lowpassData[MAX_LENGTH];
int highpassData[MAX_LENGTH];
double gain;
double Ts;
} TF_DIF_t;
__EXPORT int testFunction(void);
__EXPORT float updateFilter(FIL_T *pFilt, float inp);
__EXPORT int initFilter(const TF_DIF_t *pDifc, double Ts, FIL_T *pFilt);
__END_DECLS
#endif
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