/******************************************************************************************************
 SOFTWARE COPYRIGHT NOTICE:

 © [2013] Microchip Technology Inc. and its subsidiaries.
 You may use this software and any derivatives exclusively with Microchip products.

 THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
 OR STATUTORY, APPLY TO THIS SOFTWARE, INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT,
 MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE, OR ITS INTERACTION WITH MICROCHIP PRODUCTS,
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 LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE SOFTWARE, HOWEVER CAUSED, EVEN IF
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#ifndef FILTER_H
#define FILTER_H

#include <math.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>



typedef struct filter_tag
{
    uint32_t n;
    double a[2];
    double b[2];
    double x[2];
    double y[2];
    double lastResult;
    double f;
    double gain;
    double fs;
    double fc;
}filterLowPass;

void filterLowPassInit(filterLowPass *k, double sampleFreq, double cuttoff);
void filterSetCutoff(filterLowPass* k, double fc);
double filterGetResult(filterLowPass *k);
double filterSingle(filterLowPass *k, double x);


#endif //FILTER_H
