#define moteur 5
//  Horizontal sur A0   avant arriere  
//  Vertical sur A1     Accélération   Ralentir 
int vitesse = 0;
int pas =0;
int sens ;
int change = 0 ;
int pinterupt = 2;


void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(moteur,OUTPUT); 
Serial.print("bonjour");
delay ( 2000);
pinMode(pinterupt, INPUT);
attachInterrupt(digitalPinToInterrupt(2),arretUrgence,LOW);
}

void loop() {
  // put your main code here, to run repeatedly:

int direction = analogRead(A0);
Serial.print("brut = ");
Serial.print(direction);
int avant_arriere = map(direction,1023,0, 0,5);
if ((avant_arriere == 0 )|| (avant_arriere == 5)) {
  sens = avant_arriere ;
}
Serial.print("    Direction = ");

if (sens == 5)
{Serial.println("AVANT");}
else if( sens == 0) { Serial.println("ARRIERE");}


// on gere la vitesse par pas  
pas = analogRead(A1);
Serial.print("pas = ");
Serial.print(pas);
quis_vitesse(pas); 
Serial.print("    pas_mod = ");
Serial.println(change);
 vitesse = vitesse + change ;
 Serial.print("    vitesse = ");
Serial.println(vitesse);
delay(1000);
analogWrite(moteur, direction);
}

int quis_vitesse(int parm1) {
change = map(parm1,0,1023,-5,5);
Serial.println(change);
return(change);
}
void arretUrgence()
{
  vitesse = 0;
}