Arduino.ru

byte RFIDcardNum[4];
byte evenBit = 0;
byte oddBit = 0;
byte isData0Low = 0;
byte isData1Low = 0;
int recvBitCount = 0;
byte isCardReadOver = 0;

void setup()
{
  Serial.begin(9600);
  attachInterrupt(0, ISRreceiveData0, FALLING );  //data0/rx is connected to pin 2, which results in INT 0
  attachInterrupt(1, ISRreceiveData1, FALLING );  //data1/tx is connected to pin 3, which results in INT 1
pinMode(13, OUTPUT);
}

void loop()
{
  
  //читает данные
  if(isData0Low||isData1Low){
    if(1 == recvBitCount){//even bit
      evenBit = (1-isData0Low)&isData1Low;
       
    }
    else if( recvBitCount >= 26){//odd bit
      oddBit = (1-isData0Low)&isData1Low;
      isCardReadOver = 1;
      delay(10);
      
      if (isCardReadOver == 9923104)
     
   {
  digitalWrite(13, LOW);    // выключаем светодиод
  Serial.println(" hello ");
    }
  if (isCardReadOver == 6856671) {
  digitalWrite(13,  HIGH);
   
  Serial.println(" hello1 ");
  
    }
    else{
      //only if isData1Low = 1, card bit could be 1
      RFIDcardNum[2-(recvBitCount-2)/8] |= (isData1Low << (7-(recvBitCount-2)%8));
   

    }
    //reset data0 and data1
    isData0Low = 0;
    isData1Low = 0;
    
  }

  //print the card id number
  if(isCardReadOver){
    //if(checkParity()){
    //Serial.println();
    //Serial.print(RFIDcardNum[2],HEX);//High byte
    //Serial.print(RFIDcardNum[1],HEX);//Midle byte
    //Serial.println(RFIDcardNum[0],HEX);//Low byte
      Serial.println(*((long *)RFIDcardNum));
    //}
    resetData();
  }

  }
}

byte checkParity(){
  int i = 0;
  int evenCount = 0;
  int oddCount = 0;
  for(i = 0; i < 8; i++){
    if(RFIDcardNum[2]&(0x80>>i)){
      evenCount++;
    }
  }
  for(i = 0; i < 4; i++){
    if(RFIDcardNum[1]&(0x80>>i)){
      evenCount++;
    }
  }
  for(i = 4; i < 8; i++){
    if(RFIDcardNum[1]&(0x80>>i)){
      oddCount++;
    }
  }
  for(i = 0; i < 8; i++){
    if(RFIDcardNum[0]&(0x80>>i)){
      oddCount++;
    }
  }
  
  if(evenCount%2 == evenBit && oddCount%2 != oddBit){
    return 1;
  }
  else{
    return 0;
  }
}
void resetData(){
  RFIDcardNum[0] = 0;
  RFIDcardNum[1] = 0;
  RFIDcardNum[2] = 0;
  RFIDcardNum[3] = 0;
  evenBit = 0;
  oddBit = 0;
  recvBitCount = 0;
  isData0Low = 0;
  isData1Low = 0;
  isCardReadOver = 0;
}
// handle interrupt0
void ISRreceiveData0(){
  recvBitCount++;
  isData0Low = 1;
}

// handle interrupt1
void ISRreceiveData1(){
  recvBitCount++;
  isData1Low = 1;
}

вроде все правельно прописал но не работает должен при считывание карты включать лампочку