#define STEP_PIN 6
#define DIR_PIN 5
#define EN_PIN 7

#define INP_PIN 2
#define RESET_PIN 3
#define MS1_PIN 8
#define MS2_PIN 9
#define MS3_PIN 10

#define freq 2500

bool flg = 0;

void setup() {

  pinMode(STEP_PIN, OUTPUT);
  pinMode(DIR_PIN, OUTPUT);
  pinMode(EN_PIN, OUTPUT);

  pinMode(INP_PIN, INPUT_PULLUP);
  pinMode(RESET_PIN, INPUT_PULLUP);
  pinMode(MS1_PIN, INPUT_PULLUP);
  pinMode(MS2_PIN, INPUT_PULLUP);
  pinMode(MS2_PIN, INPUT_PULLUP);  
  
  digitalWrite(EN_PIN, HIGH);

}

void loop() {

  if (!digitalRead(INP_PIN)){
    digitalWrite(EN_PIN, LOW);
    flg = 1;

  }

  if (flg) {
    digitalWrite(DIR_PIN, HIGH);

    for (int i = 0; i < 25; i++){
      digitalWrite(STEP_PIN, HIGH);
      delayMicroseconds(freq);
      digitalWrite(STEP_PIN, LOW);
    }
    
    flg = 0;
    delay(300);
  
    digitalWrite(EN_PIN, HIGH);

  }

}