// ---- Pin Definitions ----
#define STEP_PIN    D1
#define DIR_PIN     D0
#define EN_PIN      D3

#define M0_PIN      D2
#define M1_PIN      D4
#define M2_PIN      D5

// ---- Motor Parameters ----
#define STEPS_PER_REV 200     // 1.8° motor
#define MICROSTEPPING 16      // 1/16 microstep

int totalSteps = STEPS_PER_REV * MICROSTEPPING;

// ---- Timing ----
int stepDelay = 800;  // microseconds (controls speed)

void stepMotor(int steps, bool direction) {
  digitalWrite(DIR_PIN, direction);

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

void setup() {
  pinMode(STEP_PIN, OUTPUT);
  pinMode(DIR_PIN, OUTPUT);
  pinMode(EN_PIN, OUTPUT);

  pinMode(M0_PIN, OUTPUT);
  pinMode(M1_PIN, OUTPUT);
  pinMode(M2_PIN, OUTPUT);

  // ---- Enable Driver (LOW = ON) ----
  digitalWrite(EN_PIN, LOW);

  // ---- Set Microstepping: 1/16 ----
  digitalWrite(M0_PIN, HIGH);
  digitalWrite(M1_PIN, HIGH);
  digitalWrite(M2_PIN, LOW);

  delay(1000);
}

void loop() {

  // ---- Clockwise ----
  stepMotor(totalSteps, HIGH);
  delay(1000);

  // ---- Counter-clockwise ----
  stepMotor(totalSteps, LOW);
  delay(1000);
}