filter.cpp

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/* This file has been prepared for Doxygen automatic documentation generation.*/
#include "filter.h"
 
int16_t calculateEMA(uint16_t currentSample, uint16_t previousEMA, uint8_t alphaExponent)
{
     if (currentSample > MAX_INT)
     {
          currentSample = MAX_INT;
     }
     if (previousEMA > MAX_INT)
     {
          previousEMA = MAX_INT;
     }
 
     int16_t newEMA = (int16_t)previousEMA;
     newEMA += ((int16_t)currentSample - (int16_t)previousEMA) >> alphaExponent;
 
     if (newEMA < 0)
     {
          newEMA = 0;
     }
 
     return newEMA;
}