Dos motores paso a paso

gistfile1.txt

int pulM1=5; //define Pulse pin M1
int dirM1=6; //define Direction pin M1

int pulM2=¿?; //define Pulse pin M2
int dirM2=¿?; //define Direction pin M2

void setup() {
  
  pinMode (pulM1, OUTPUT);
  pinMode (dirM1, OUTPUT);
 
  pinMode (pulM2, OUTPUT);
  pinMode (dirM2, OUTPUT);

}

void loop() {
  for (int i=0; i<6400; i++)    //Forward 5000 steps
  {
    digitalWrite(dirM1,LOW);
    digitalWrite(pulM1,HIGH);
    
    digitalWrite(dirM2,LOW);
    digitalWrite(pulM2,HIGH);
    
    delayMicroseconds(50);
    
    digitalWrite(pulM1,LOW);
    digitalWrite(pulM2,LOW);
    
    delayMicroseconds(50);    
  } 
  for (int i=0; i<6400; i++)   //Backward 5000 steps
  {
    digitalWrite(dirM1,HIGH);
    digitalWrite(pulM1,HIGH);
    
    digitalWrite(dirM2,HIGH);
    digitalWrite(pulM2,HIGH);
    
    delayMicroseconds(50);
    
    digitalWrite(pulM1,LOW);
    digitalWrite(pulM2,LOW);
    
    delayMicroseconds(50);
  }
}