//----ingressi stepper driver -----
int PUL=9; //define Pulse pin
int DIR=8; //define Direction pin
int ENA=7; //define Enable Pin
//----------------------------------

//----variabili per controllo reset-----
int topLeft= 5;              //ingresso micro (posizionato a estrema sx)
int readyTogoLed =6;          //led segnalazione avvenuto posizionamento

int resetLeft= 0;             //lelettura micro
int stepperPosition=0;        //var per arrivo motore in posizione
int zeroPosition = 0;
int readyTogo = 0;
void setup() {
  pinMode (PUL, OUTPUT);
  pinMode (DIR, OUTPUT);
  pinMode (ENA, OUTPUT);
  pinMode (readyTogoLed, OUTPUT);
  pinMode (topLeft, INPUT);
 Serial.begin (9600);

}
void positionReset(){

   while ( digitalRead(topLeft) == LOW)
       {

        digitalWrite(DIR,HIGH);
        digitalWrite(ENA,LOW);
        digitalWrite(PUL,HIGH);
        delayMicroseconds(500);
        digitalWrite(PUL,LOW);
        delayMicroseconds(500);}

}
void loop() {

   resetLeft = digitalRead (topLeft);
   readyTogo = zeroPosition;


       if (readyTogo == 0){ positionReset(); }
       if (resetLeft == 1){ zeroPosition = 1; }
       if (readyTogo == 1){ digitalWrite(readyTogoLed, HIGH);      }
        Serial.print( "stato micro...");
        Serial.print(resetLeft);
         Serial.print( "...motore in posizione...");
        Serial.print(stepperPosition);
        Serial.print( "...");
        Serial.print( "stato reset avvio....");
        Serial.println( readyTogo);