// --- Pins utilisées ---
// "PWM" : D9 et D10
// "Normales" : D2 et D4
// "Analogiques" : A0 et A1 (fonctionnent comme D14 et D15)
const int pinAnalogWrite_PWM = 9;     // PWM
const int pinAnalogWrite_Normale = 2; // non-PWM
const int pinAnalogWrite_Analog = A0; // "sortie analogique"

const int pinDigitalWrite_PWM = 10;   // PWM
const int pinDigitalWrite_Normale = 4;// non-PWM
const int pinDigitalWrite_Analog = A1;// "sortie analogique"

// --- Variables ---
unsigned long previousMillis = 0;
const unsigned long interval = 20;  // temps entre chaque pas de variation
int brightness = 0;
int fadeAmount = 5; // variation à chaque pas

void setup() {
  // Configure les 6 sorties
  pinMode(pinAnalogWrite_PWM, OUTPUT);
  pinMode(pinAnalogWrite_Normale, OUTPUT);
  pinMode(pinAnalogWrite_Analog, OUTPUT);

  pinMode(pinDigitalWrite_PWM, OUTPUT);
  pinMode(pinDigitalWrite_Normale, OUTPUT);
  pinMode(pinDigitalWrite_Analog, OUTPUT);

  Serial.begin(9600);
  Serial.println("Comparaison des sorties PWM, normales et analogiques");
}

void loop() {
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;

    // --- analogWrite() progressif ---
    analogWrite(pinAnalogWrite_PWM, brightness);
    analogWrite(pinAnalogWrite_Normale, brightness);
    analogWrite(pinAnalogWrite_Analog, brightness);

    // --- digitalWrite() clignotement progressif simulé ---
    // (on allume quand brightness dépasse la moitié de sa plage)
    digitalWrite(pinDigitalWrite_PWM, brightness > 127 ? HIGH : LOW);
    digitalWrite(pinDigitalWrite_Normale, brightness > 127 ? HIGH : LOW);
    digitalWrite(pinDigitalWrite_Analog, brightness > 127 ? HIGH : LOW);

    // variation
    brightness += fadeAmount;
    if (brightness <= 0 || brightness >= 255) {
      fadeAmount = -fadeAmount; // inverse la direction du fondu
    }
  }
}