/* Raw IR decoder sketch!
 
 This sketch/program uses the Arduno and a PNA4602 to 
 decode IR received. This can be used to make a IR receiver
 (by looking for a particular code)
 or transmitter (by pulsing an IR LED at ~38KHz for the
 durations detected 
 
 Code is public domain, check out <a href="http://www.ladyada.net" title="www.ladyada.net" rel="nofollow"><a href="http://www.ladyada.net">www.ladyada.net</a></a> and adafruit.com
 for more tutorials! 
 */
 
// We need to use the 'raw' pin reading methods
// because timing is very important here and the digitalRead()
// procedure is slower!
//uint8_t IRpin = 2;
// Digital pin #2 is the same as Pin D2 see
// <a href="http://arduino.cc/en/Hacking/PinMapping168" title="http://arduino.cc/en/Hacking/PinMapping168" rel="nofollow">http://arduino.cc/en/Hacking/PinMapping168</a> for the 'raw' pin mapping
#define IRpin_PIN      PIND
#define IRpin          2
 
// the maximum pulse we'll listen for - 65 milliseconds is a long time
#define MAXPULSE 65000
 
// what our timing resolution should be, larger is better
// as its more 'precise' - but too large and you wont get
// accurate timing
#define RESOLUTION 20 
 
// we will store up to 100 pulse pairs (this is -a lot-)
uint16_t pulses[100][2];  // pair is high and low pulse 
uint8_t currentpulse = ; // index for pulses we're storing
 
void setup(void) {
  Serial.begin(9600);
  Serial.println("Ready to decode IR!");
}
 
void loop(void) {
  uint16_t highpulse, lowpulse;  // temporary storage timing
  highpulse = lowpulse = ; // start out with no pulse length
 
 
//  while (digitalRead(IRpin)) { // this is too slow!
    while (IRpin_PIN & (1 << IRpin)) {
     // pin is still HIGH
 
     // count off another few microseconds
     highpulse++;
     delayMicroseconds(RESOLUTION);
 
     // If the pulse is too long, we 'timed out' - either nothing
     // was received or the code is finished, so print what
     // we've grabbed so far, and then reset
     if ((highpulse >= MAXPULSE) && (currentpulse != 0)) {
       printpulses();
       currentpulse=;
       return;
     }
  }
  // we didn't time out so lets stash the reading
  pulses[currentpulse][] = highpulse;
 
  // same as above
  while (! (IRpin_PIN & _BV(IRpin))) {
     // pin is still LOW
     lowpulse++;
     delayMicroseconds(RESOLUTION);
     if ((lowpulse >= MAXPULSE)  && (currentpulse != 0)) {
       printpulses();
       currentpulse=;
       return;
     }
  }
  pulses[currentpulse][1] = lowpulse;
 
  // we read one high-low pulse successfully, continue!
  currentpulse++;
}
 
void printpulses(void) {
  Serial.println("\n\r\n\rReceived: \n\rOFF \tON");
  for (uint8_t i = ; i < currentpulse; i++) {
    Serial.print(pulses[i][] * RESOLUTION, DEC);
    Serial.print(" usec, ");
    Serial.print(pulses[i][1] * RESOLUTION, DEC);
    Serial.println(" usec");
  }
 
  // print it in a 'array' format
  Serial.println("int IRsignal[] = {");
  Serial.println("// ON, OFF ");
  for (uint8_t i = ; i < currentpulse-1; i++) {
    //Serial.print("\t"); // tab
    Serial.print("pulseIR(");
    Serial.print(pulses[i][1] * RESOLUTION , DEC);
    Serial.print(");");
    Serial.println("");
    //Serial.print("\t");
    Serial.print("delayMicroseconds(");
    Serial.print(pulses[i+1][] * RESOLUTION , DEC);
    Serial.println(");");
 
  }
  //Serial.print("\t"); // tab
  Serial.print("pulseIR(");
  Serial.print(pulses[currentpulse-1][1] * RESOLUTION, DEC);
  Serial.print(");");
 
}