/*  -----------------
    GUESS  Infra Red Format   
    ------------------------*/

    int ir_signal = 8;
    int ir_vcc  = 10 ;
    int ir_gnd = 9 ;

    typedef struct
    {
    uint16_t startbit;      //  in microseconds
    char name[10] ;
    }
protocol_t;

#define PROTOCOLS_MAX 10
const protocol_t protocols[PROTOCOLS_MAX] = 
{
  {  140, "RECS80"  },
  {  275, "DENON"   },
  {  512, "MOTOROLA"},
  {  890, "RC5"     },
  { 2400, "SIRCS"   },
  { 2685, "RC6"     }, 
  { 3380, "JAPANESE"},
  { 4500, "SAMSUNG" },
  { 8000, "DAEWOO"  },
  { 9000, " NEC"    },
}; 

boolean interval_within_bounds(uint16_t interval, uint16_t target, uint8_t tolerance)
{
  unsigned long dx=(unsigned long)target*tolerance/100;
  return (interval>target-dx && interval<target+dx);
}  

void decode(unsigned long pulse)
{
  for (int i=0; i<PROTOCOLS_MAX; i++)
    {
      if (interval_within_bounds(pulse,protocols[i], startbit,10)==true)
      {
        Serial.print(protocols[i].name);
        break;
      }
    }
  Serial.print(" - ");
  Serial.println(pulse);
}


void setup(void) {
  Serial.begin(115200);
  pinMode(ir_signal, INPUT);
  pinMode(ir_gnd, OUTPUT);
  digitalWrite(ir_gnd,LOW);
  pinMode(ir_vcc, OUTPUT);
  digitalWrite(ir_vcc, HIGH);
  // suppress spurious pulses on power on
  delay(500); 
  while (pulseIn(ir_signal, LOW, 500000) !=0);
}

void loop(void) {
unsigned long pulse = pulseIn(ir_signal, LOW, 10000000);
if (pulse !=0)
  {
  decode (pulse);
  while(1);
  }

}