#define STEP_PIN 2
#define DIR_PIN 3
#define ENABLE_PIN 4
#define RESET_PIN 5

bool motorRunning = false;

void setup() {
  pinMode(STEP_PIN, OUTPUT);
  pinMode(DIR_PIN, OUTPUT);
  pinMode(ENABLE_PIN, OUTPUT);
  pinMode(RESET_PIN, OUTPUT);

  digitalWrite(ENABLE_PIN, LOW);  // Enable the motor driver
  digitalWrite(RESET_PIN, HIGH);  // Ensure the motor is not in reset mode

  Serial.begin(9600);  // Start serial communication for virtual terminal
}

void loop() {
  if (Serial.available() > 0) {
    String command = Serial.readStringUntil('\n');  // Read command from terminal
    command.trim();  // Remove any extra spaces or newlines

    if (command.equalsIgnoreCase("start")) {
      Serial.println("Motor started...");
      motorRunning = true;
      digitalWrite(ENABLE_PIN, LOW);  // Enable the motor driver
    } 
    else if (command.equalsIgnoreCase("stop")) {
      Serial.println("Motor stopped.");
      motorRunning = false;
      digitalWrite(ENABLE_PIN, HIGH);  // Disable the motor driver
    }
    else if (command.equalsIgnoreCase("enable")) {
      Serial.println("Motor enabled.");
      digitalWrite(ENABLE_PIN, LOW);  // Enable the motor driver
    }
    else {
      Serial.println("Unknown command.");
    }
  }

  if (motorRunning) {
    stepMotor(1);  // Rotate motor one step continuously
  }
}

void stepMotor(int steps) {
  for (int i = 0; i < steps; i++) {
    digitalWrite(STEP_PIN, HIGH);
    delayMicroseconds(500);
    digitalWrite(STEP_PIN, LOW);
    delayMicroseconds(500);
  }
}