Testing the analogRead() function on the SAMD21 micro-controller

analog.ino

#define Debug Serial

float average = 0.0;
float total = 0.0;
int count = 0;

void setup() {
  analogReadResolution(12);
  pinMode(A0, INPUT);
  Debug.begin(9600);
  while (!Debug);
}

void loop() {
  int a = analogRead(A0);
  float v = 3.3*((float)a)/4095;
  count = count + 1;
  total = total + v;
  average = total/count;
  
  Debug.print(count);
  Debug.print(" ");
  Debug.print(a);
  Debug.print(" ");
  Debug.print(v,3);
  Debug.print(" ");
  Debug.print(average,3);
  Debug.println( );

  delay(1000);
}