led-pwm.ino

const int BUTTON_PIN = 10;
const int LED_PIN_PWM = 11;
const int LED_PIN_DIR = 12;

int buttonState = 0;
int step = 0;
bool reverse = false;
int speed = 0;

// Etape 0: avant - 0
// Etape 1: avant - 25
// Etape 2: avant - 50
// Etape 3: avant - 75
// Etape 4: avant - 100
// Etape 5: arriere - 0
// Etape 6: arriere - 25
// Etape 7: arriere - 50
// Etape 8: arriere - 75
// Etape 9: arriere - 100

void setup() {
    pinMode(LED_PIN_PWM, OUTPUT);
    pinMode(LED_PIN_DIR, OUTPUT);

    analogWrite(LED_PIN_PWM, 0);
    digitalWrite(LED_PIN_DIR, LOW);

    pinMode(BUTTON_PIN, INPUT);

    Serial.begin(9600);
    Serial.println("Demarrage");
}

void loop {
    buttonState = digitalRead(BUTTON_PIN);

    if (buttonState == HIGH) {
        step += 1;

        if (step == 10) {
            step = 0;
            speed = -25;
        }

        Serial.print("Etape: ");
        Serial.println(step);

        if (step < 5) {
            reverse = false;
        } else {
            reverse = true;
        }

        speed += 25;

        if (step == 5) {
            speed = 0;
        }

        Serial.print("Reverse: ");
        Serial.println(reverse);

        Serial.print("Vitesse (%): ");
        Serial.println(speed);
    }

    if (speed > 100) {
        speed = 100;
    }
    
    if (reverse) {
        digitalWrite(LED_PIN_DIR, HIGH);
    } else {
        digitalWrite(LED_PIN_DIR, LOW);
    }

    analogWrite(LED_PIN_PWM, map(speed, 0, 100, 0, 255));
}