//Entrees
  //Memoire image
  bool I[3];
  //Identification des broches
  const uint8_t bp1 = 2;
  const uint8_t bp2 = 3;
  const uint8_t bp3 = 4;
  //Anti-rebonds
  const uint8_t debounce_Delay = 20;
  uint32_t I_Debounced;
  uint32_t debounce_ST[3];
//Sorties
  //Memoire image
  bool O[1];
  //Identification des broches
  const uint8_t led = 5;
//Bits internes
  bool B[6];
//Prototypes
  bool LireEntree(bool, bool, uint8_t, uint8_t, uint8_t, int);
void setup() {
  // Configuration des broches (entrees)
  pinMode(bp1, INPUT_PULLUP);
  pinMode(bp2, INPUT_PULLUP);
  pinMode(bp3, INPUT_PULLUP);
  // Initialisation pour anti-rebonds
  I_Debounced = 0b11111111111111111111111111111111;
  // Configuration des broches (sorties)
  pinMode(led, OUTPUT);
  // Initialisation des bits internes
  memset(B, false, sizeof(B));
}
void loop() {
  // Acquisition des entrees
  I[0] = LireEntree(true,I[0],0,0,bp1,LOW);
  I[1] = LireEntree(true,I[1],1,1,bp2,LOW);
  I[2] = LireEntree(true,I[2],2,2,bp3,LOW);
  //Traitement des bits internes
  B[0] = I[0] && !(B[1]);
  B[1] = I[0];
  B[2] = I[1] && !(B[3]);
  B[3] = I[1];
  B[4] = I[2] && !(B[5]);
  B[5] = I[2];
  //Traitement des sorties
  O[0] = !(O[0]) && (B[0] || B[2] || B[4]) || O[0] && !(B[0]) && !(B[2]) && !(B[4]);
  // Ecriture des sorties
  digitalWrite(led, O[0] ? HIGH : LOW);
}
bool LireEntree(bool toDebounce, bool imageEntree, uint8_t index, uint8_t index_debounce, uint8_t pin, int level)
{
  if(toDebounce == false){
    return (digitalRead(pin) == level);
  }
  if((I_Debounced & (1<<index)) != 0){
    bool I_lu = (digitalRead(pin) == level);
    if(imageEntree != I_lu){
      debounce_ST[index_debounce] = millis();
      I_Debounced = I_Debounced & ~(1<<index);
    }
    return I_lu;
  }
  else{
    if((millis()- debounce_ST[index_debounce]) >= debounce_Delay){
      I_Debounced = I_Debounced | (1<<index);
      return LireEntree(toDebounce,imageEntree,index,index_debounce,pin,level);
    }
    else{
      return imageEntree;
    }
  }
}