#define bp_PIN 2
#define LED_PIN 13
void gestion_BP();
int delai=3000;
volatile long avant=0;

volatile bool etatLed=false;
void setup() {
  pinMode(bp_PIN, INPUT_PULLUP);
  pinMode(LED_PIN, OUTPUT);
  attachInterrupt(digitalPinToInterrupt(bp_PIN), gestion_BP, RISING);
  etatLed=0;

}

void loop() {
digitalWrite(LED_PIN,etatLed);
long maintenant = millis();
if ((maintenant-avant)>delai) 
  {
    etatLed=false;
  }
}

void gestion_BP()
{
  etatLed=HIGH;
  avant=millis();
}