#include <math.h>
#include <DueTimer.h>
int r;
float Fs = 10000;
float out = 0;

const float BL = 11;
float X[11] = {
    0,  0,  0,  0,
    0,   0,   0, 0,
    0,  0,  0
};
const float B[11] = {
    0.02285587755007,  0.01644493311478,  -0.1103146181308,  -0.1996653808026,
     0.1052876191363,   0.3774952159645,   0.1052876191363,  -0.1996653808026,
    -0.1103146181308,  0.01644493311478,  0.02285587755007
};

void timerInterrupt(void)
{
  X[0] = analogRead(A0);
  out = 0;

  for(int i = 0; i < BL; i++)
  {
    out += X[i] * B[i];
  }

  X[10] = X[9];

  for(int i = (BL - 1); i > 0; i--)
  {
    X[i] = X[i - 1];
  }

  analogWrite(DAC1, out + 1000);
}
void setup() {
  analogReadResolution(12);
  analogWriteResolution(12);
  pinMode(A0,INPUT);
  Timer3.attachInterrupt(timerInterrupt);
  Timer3.start(100); //10khz sampling
}

void loop() {
  r++; //do something useless
}