Demo entry 6682759

1

   

Submitted by anonymous on Dec 10, 2017 at 20:04
Language: Arduino. Code size: 2.1 kB.

#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 = 0; // 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 = 0; // 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=0;
       return;
     }
  }
  // we didn't time out so lets stash the reading
  pulses[currentpulse][0] = highpulse;
 
  // same as above
  while (! (IRpin_PIN & _BV(IRpin))) {
     // pin is still LOW
     lowpulse++;
     delayMicroseconds(RESOLUTION);
     if ((lowpulse >= MAXPULSE)  && (currentpulse != 0)) {
       printpulses();
       currentpulse=0;
       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 = 0; i < currentpulse; i++) {
    Serial.print(pulses[i][0] * RESOLUTION, DEC);
    Serial.print(" usec, ");
    Serial.print(pulses[i][1] * RESOLUTION, DEC);
    Serial.println(" usec");
  }
}

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