/**
 * DC motor drive with joystick
 * 
 * @author Florent Lemaire
 */

#define in1 8
#define in2 9
#define enA 6
#define analogInput A0

void setup() {
  pinMode(in1, OUTPUT);
  pinMode(in2, OUTPUT);
  pinMode(enA, OUTPUT);
  pinMode(analogInput, INPUT);
}

void loop() {
  int xAxis = analogRead(analogInput); // Read Joysticks X-axis
  int motorSpeedA = 0;

  // X-axis used for left and right control
  if (xAxis < 470) {
    // Set Motor A backward
    digitalWrite(in1, HIGH);
    digitalWrite(in2, LOW);
    // Convert the declining X-axis readings from 470 to 0 into increasing 0 to 255 value
    motorSpeedA = map(xAxis, 470, 0, 0, 255);
  }else 
  if (xAxis > 550) {
    // Set Motor A forward
    digitalWrite(in1, LOW);
    digitalWrite(in2, HIGH);
    // Convert the increasing X-axis readings from 550 to 1023 into 0 to 255 value
    motorSpeedA = map(xAxis, 550, 1023, 0, 255);
  }else {
    digitalWrite(in1, LOW);
    digitalWrite(in2, LOW);
  }
  analogWrite(enA, motorSpeedA); // Send PWM signal to motor
}