//funciona !!

int dc11=0; //13
int dc12=1; //12
float speedx=0.5;
int tiemp=10;
int dc21=3; //10
int dc22=9; //3
int pc1=6; //7 
int pc2=4; //9
int pc3=5; //8

int pincont1=0;   // 00 Atrás
int pincont2=0;   // 01 derecha
                 // 10 izquierda
                 // 11 avanza
int pincont3=0;   // si 1 frena
void setup() {
  // put your setup code here, to run once:
  pinMode(dc11,OUTPUT);
  pinMode(dc12,OUTPUT);
  pinMode(dc21,OUTPUT);
  pinMode(dc22,OUTPUT);
  pinMode(pc1,INPUT);
  pinMode(pc2,INPUT);
  pinMode(pc3,INPUT);
  digitalWrite(dc12,LOW);
  digitalWrite(dc22,LOW);  
  digitalWrite(pc1,LOW);
  digitalWrite(pc2,LOW);
  digitalWrite(pc3,LOW);

}

void loop(){
  pincont3=digitalRead(pc3);
  if(pincont3==1)
  {
  digitalWrite(dc11,LOW);
  digitalWrite(dc12,LOW);
  digitalWrite(dc21,LOW);
  digitalWrite(dc22,LOW);
  }
  else
  {
  pincont1=digitalRead(pc1);
  pincont2=digitalRead(pc2); 
  if(pincont1==0 && pincont2==0)
  {digitalWrite(dc11,LOW);
  digitalWrite(dc21,LOW);
  digitalWrite(dc12,HIGH);
  digitalWrite(dc22,HIGH);
  delay(round(tiemp*speedx));
  }
  if(pincont1==1 && pincont2==0)
  {digitalWrite(dc11,HIGH);
  digitalWrite(dc12,LOW);
  digitalWrite(dc21,LOW);
  digitalWrite(dc22,HIGH);
  delay(round(tiemp*speedx));

  }
  if(pincont1==0 && pincont2==1)
  {digitalWrite(dc11,LOW);
  digitalWrite(dc12,HIGH);
  digitalWrite(dc21,HIGH);
  digitalWrite(dc22,LOW);
  delay(round(tiemp*speedx));

  }
  if(pincont1==1 && pincont2==1)
  {digitalWrite(dc11,HIGH);
  digitalWrite(dc21,HIGH);
  digitalWrite(dc12,LOW);
  digitalWrite(dc22,LOW);
  delay(round(tiemp*speedx));
  }
  digitalWrite(dc11,LOW);
  digitalWrite(dc12,LOW);
  digitalWrite(dc21,LOW);
  digitalWrite(dc22,LOW);
  delay(round(tiemp*(1-speedx)));
}
}