const int  DIR=12;
const int STEP=14;
const int steps_per_rev=50;

void setup()
{
  Serial.begin(115200);
  pinMode(STEP, OUTPUT);
  pinMode(DIR, OUTPUT);
}

void loop()
{
  digitalWrite(DIR,HIGH);
  Serial.println("Girando no sentido horario");

  for(int i=0;i<steps_per_rev;i++)
  {
    digitalWrite(STEP, HIGH);
    delayMicroseconds(2000);
    digitalWrite(STEP,LOW);
    delayMicroseconds(2000);
  }
  delay(1000);

  digitalWrite(DIR, LOW);
  Serial.println("Girando en sentido anti-horario");
  
  for(int i=0;i<steps_per_rev;i++)
  {
    digitalWrite(STEP, HIGH);
    delayMicroseconds(2000);
    digitalWrite(STEP,LOW);
    delayMicroseconds(2000);
  }
  delay(1000);

}