#include <propeller2.h>
#include <math.h>

#define CORDIC_PI		0x80000000
#define CORDIC_PI_2		0x40000000
#define CORDIC_PI_4		0x20000000
#define CORDIC_RESOLUTION 	0.000000083819

///////////////////////////////////////////////////////////////////////
////////////////// This come from propeller2.h ////////////////////////
///////////////////////////////////////////////////////////////////////
// cartesian coordinates
typedef struct _cartesian {
   int32_t x, y;
} cartesian_t;

// polar coordinates
typedef struct _polar {
   uint32_t r, t;
} polar_t;

// 64 bit counter
typedef struct _counter64 {
    uint32_t low, high;
} counter64_t;

/* CORDIC instructions */
cartesian_t _rotxy(cartesian_t coord, uint32_t t);
cartesian_t _polxy(polar_t coord);
polar_t     _xypol(cartesian_t coord);

////////////////////////////////////////////////////////////////////////

void toPolar (int * abs, int * arg, int real, int imag);

void toCartesian(int * real, int * imag, int abs, int arg);

void rot (int * real, int * imag, int phi);

int rot90degree_cw (int arg);

int rot90degree_ccw (int arg);

void generate_sin_cos (int * buffer, int bufferlength, int amplitude, int phi_0, int speed, short cos_flag);

void dft (int * buffer, int N, int * X_abs, int * X_arg);

void hilbert (int * buffer, int N, int * X_abs, int * X_arg);

void inversdft (int * buffer, int N, int * X_abs, int * X_arg);

cartesian_t dft (int * realbuffer, int bufferlength);