//#define DEBUG
void displayBuffer(const char * name, char * tab, char tab_size)
{
#ifdef DEBUG
Serial.print("Etat du buffer ");
Serial.print(name);
Serial.print(" contenant ");
Serial.print(tab_size,DEC);
Serial.println(" case(s) : ");
for (int i=0;i<tab_size ;i++)
{
  Serial.print(i,DEC);
  Serial.print("  : ");
  Serial.print(tab[i],DEC);
  Serial.println("");
}
#endif
}