const int dirpin = 4;  // pin de direccion
const int stepPin = 5; // pin de pasos 
const int enPin = 6; // pin de encendido de driver
const int buttonF = 2;  // 
const int buttonR = 3;

int buttonstateF;
int buttonstateR;

int val = 0;

void setup() {
  //Serial.begin(115200);
  pinMode(buttonF, INPUT);
  pinMode(buttonR, INPUT);
  pinMode(dirpin, OUTPUT);
  pinMode(stepPin, OUTPUT);
  pinMode(enPin, OUTPUT);

  digitalWrite(enPin, LOW); //Activar el driver

}

void loop() {

 val = analogRead(A0);
 val = map(val, 0, 1023, 300, 4000);
 //Serial.println(val);
 buttonstateF = digitalRead(buttonF);
 buttonstateR = digitalRead(buttonR);

 if (buttonstateF == HIGH & buttonstateR == LOW)

 {
   digitalWrite(dirpin, HIGH);
   digitalWrite(stepPin, HIGH);
   delayMicroseconds(val);
   digitalWrite(stepPin, LOW);
   delayMicroseconds(val);
   
 }

 
 if (buttonstateR == HIGH & buttonstateF == LOW)
 {
 digitalWrite(dirpin, LOW);
 digitalWrite(stepPin, HIGH);
 delayMicroseconds(val);
 digitalWrite(stepPin, LOW);
 delayMicroseconds(val);

 }


  
}