arduino midi leds (midiLeds.ino)

/*
midi leds
pier giuliano nioi
http://piergiu.wordpress.com
*/
union serial_super_data {
   unsigned long int_4_bytes;
   unsigned char read_byte[4];
} super_data;

//setup: declaring inputs and outputs and begin serial
void setup() {
  pinMode(2,OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(4,OUTPUT);
  pinMode(5,OUTPUT);
  pinMode(6,OUTPUT);
  Serial.begin(57600);
}

//loop: wait for serial data, and interpret the message
void loop () {
   if (Serial.available() >= 3)  // wait for three bytes
    {
      for(int i=0;i <=3; i++)
      super_data.read_byte[i]=Serial.read();
      switch (super_data.read_byte[0]) {
        case 144:// note on message starting starting
          lightLed(super_data.read_byte[1], HIGH);
          break;
        case 128:// note off message starting
          lightLed(super_data.read_byte[1], LOW);
          break;
        default:
          break;//nada
      }//end switch
    }//end if
}//end loop


void lightLed(byte note, int value){
 if(note>=65 && note<=69){
   digitalWrite(note-63, value);
 }
}