Interruptions

Très bon tutoriel : http://www.lambot.info/interruptions-multiples-sur-arduino/

https://www.pjrc.com/teensy/td_libs_TimerOne.html

https://github.com/PaulStoffregen/TimerOne

https://www.arduino.cc/en/Reference/AttachInterrupt

Exemple :

 void setup()  
 {  
  Serial.begin(9600);  
  attachInterrupt(0, playOrPause, RISING);//pin2 -> INT0  
  //is connected with pin2 of Arduino  
 }  

 /*Interrupt service routine*/  
 void playOrPause()  
 {  
  cli();  
  if(playmode == PLAY)  
  {  
       playmode = PAUSE;  
      sendCommand(CMD_PAUSE,0);  
  }  
  else  
  {  
       playmode = PLAY;  
      sendCommand(CMD_PLAY,0);  
  }  
  sei();  
 }  

To disable interrupts:
 cli();                // disable global interrupts

and to enable them:  
 sei();                // enable interrupts

http://playground.arduino.cc/Main/AVR

Pour lire les données sur le port série voir l’exemple SerialEvent