#define FASTADC 1   

// defines for setting and clearing register bits

#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))

#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))



#define AOpin  0     // Analog output - yellow

#define SIpin  3     // Start Integration - orange

#define CLKpin 2     // Clock - red



#define NPIXELS 128  // No. of pixels in array

byte pixel[NPIXELS]; // Field for measured values <0-255>



int noir = 0;

int blanc = 0;



void setup(void) {

  pinMode(SIpin, OUTPUT);

  pinMode(CLKpin, OUTPUT);



  digitalWrite(SIpin, LOW);   // IDLE state

  digitalWrite(CLKpin, LOW);  // IDLE state   



  Serial.begin(115200);

}



void loop (void) {

  digitalWrite(CLKpin, LOW);

  digitalWrite(SIpin, HIGH);

  digitalWrite(CLKpin, HIGH);

  digitalWrite(SIpin, LOW);



  for(int i = 0; i < NPIXELS; i++) {

    pixel[i] = analogRead(AOpin)/4 ; // 8-bit is enough

    digitalWrite(CLKpin, LOW);

    digitalWrite(CLKpin, HIGH);

  }



  int maxValue, minValue = 0;

  float maxValue10m, maxValue10p;



  maxValue = pixel[0];

  minValue = pixel[0];

  for (int i = 0; i < NPIXELS; i++) {

    maxValue = max(maxValue, pixel[i]);

    minValue = min(minValue, pixel[i]);

  }



  maxValue10m = maxValue0.9;

  maxValue10p = maxValue1.1;





  noir = 0;

  blanc = 0;



  for(int i = 0; i < NPIXELS; i++) {

    if(between(pixel[i], maxValue10m, maxValue10p)) {

      Serial.print("0");

      noir++;

    } 

    else {

      Serial.print("1");

      blanc++;

    }

  }

  Serial.print(" - ");

  Serial.print(noir);

  Serial.print(" - ");

  Serial.print(blanc);



  Serial.println();

}



boolean between(float x, float mini, float maxi) {

  if(mini > maxi) {

    int tmp;

    tmp = mini;

    mini = maxi;

    maxi = tmp;

  }



  if (x >= mini && x <= maxi) {

    return true;

  } 

  else {

    return false;

  }

}