// Define pin numbers
const int dirPin = 1; // direction
const int stepPin = 2; // step
const int enaPin = 3; // enable

const int delay_us = 320; //duration of HIGH and LOW phase: min. 320; max. 2000

void setup() {
  // Define all pins at output
  pinMode(stepPin, OUTPUT);
  pinMode(dirPin, OUTPUT);
  pinMode(enaPin, OUTPUT);

  // Enable the motor driver
  digitalWrite(enaPin, LOW);
  
  // Set the rotation to one particular direction
  digitalWrite(dirPin, HIGH); 
}

void loop() {
  

  // Perform 1000 steps
  for (int x = 0; x < 400; x++) {
    // Generate a pulse
    digitalWrite(stepPin, HIGH);
    delayMicroseconds(delay_us); // The HIGH phase of a pulse cannot be as long
    digitalWrite(stepPin, LOW);
    delayMicroseconds(delay_us); // A hugh delay for lower speed in the LOW phase
  }

  delay(1000); // Wait for a second
}