lpcware

NXP 3250 Library - Math Library for the IAR compiler in C++

Discussion created by lpcware Employee on Jun 15, 2016
Content originally posted in LPCWare by trichloramine on Tue Nov 04 13:47:03 MST 2014
I have written a series of math functions in C++ for the IAR compiler.

lowpass filter, convolution, least squares curve fit, no lag smoothing filter, discrete FFT, discrete derivative... small and fast.


float * curvreg(float * vx, float * vy, unsigned n, unsigned terms,
            float *mse);

void        vfree(float * v);

float * least_sq(int (*f)(float, float *, unsigned), float * vx,
                     float * vy, unsigned n, unsigned nord1, float *mse);

float * lineqn(float * m, float * v, unsigned n);

void  lineqn_(float * b, float * work, float * a, unsigned n);


bool DiscreteDerivative(float* dataVector, int originalVectorLength, float *solutionVector, float delta);

bool Convolve(float *  data, float *solutionVector ,int originalVectorLength, float* weights, int nweights,
        int decimationFactor, int filterType, int symmetry,  int *usefulVectorLength);


bool smooth(float* data, int ndata, float *smoothed, int factor);

float besi0_(float x);

float vmaxval(float* v, unsigned n, unsigned *imx);
float vminval(float* v, unsigned n, unsigned *imx);


void FFT(void *d, int nfft);

void Dfft(void *d, int nn);


unsigned short GetNextCrc(unsigned char ch,unsigned short lastcrc);

unsigned short GetCrc(unsigned char *Buf,unsigned long count);

void AppendCrc(unsigned char *crcData, unsigned long length);

bool CheckCrc(unsigned char *crcData, unsigned long length);

char *ftoa(float f,char *buffer);

char* _itoa(int value, char* result, int base);

if you are interested in any or all of the NXP library, please contact me.

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