/*******************************************************************
*  FIR - This C function performs FIR filtering operation as:
*          ntap-1
*    y(n) = sum  wi * x(n-i)
*           i=0
*******************************************************************/

#include "dsk5509.h"

Int16 fir(Int16 *x, Int16 *w, Int16 ntap)
{
  Int16 yn = 0;              // output of FIR filter, y(n) = 0.
  int i = 0;                   // index

  for (i=0; i<ntap; ++i)
  {
    yn += ((w[i]*x[i])/ntap);           // FIR filtering of x(n) to get y(n)
  }
  return(yn);                  // return y(n) to main function
}