#include <fix_fft.h>

char im[128];
char data[128]; 
const int pinLED0 = 3;// Sorti numérique connecté à la LED0
const int pinLED1 = 4; // Sorti numérique connecté à la LED1
const int pinLED2 = 5;// Sorti numérique connecté à la LED2


void setup()
{
    Serial.begin(115200);
    pinMode(pinLED0, OUTPUT);
    pinMode(pinLED1, OUTPUT);
    pinMode(pinLED2, OUTPUT);
 
}

void loop(){
  int static i = 0;
  static long tt;
  int val;
   
      if (millis() > tt){
	if (i < 128){
	  val = analogRead(A0);
	  data[i] = val / 4 - 128;
	  im[i] = 0;
	  i++; 
         
	  
	}
	else{
	  //this could be done with the fix_fftr function without the im array.
	  fix_fft(data,im,7,0);
	  // I am only interessted in the absolute value of the transformation
	  for (i=0; i< 64;i++){
	     data[i] = sqrt(data[i] * data[i] + im[i] * im[i]);     
          
	  }
        
        for (int e=0; e< 64; e++){
    
          Serial.print(data[e], DEC);
          Serial.print(" ");

	  //do something with the data values 1..64 and ignore im
	  if(e == 63){ 
  Serial.print("\n\n");
delay(100);
}

if(data[0]>22)
{
  digitalWrite(pinLED0, HIGH);
 
}

if(data[1]>14)
{
  digitalWrite(pinLED1, HIGH);
  
}
if(data[24]>1)
{
  digitalWrite(pinLED1, HIGH);
  
}
 else {
      digitalWrite(pinLED0, LOW); 
      digitalWrite(pinLED1, LOW);
      digitalWrite(pinLED2, LOW); 
  
  
        }
       tt = millis();
}
      }
      }