void NdefRecord::print()
{
Serial.println(F(" NDEF Record"));
Serial.print(F(" TNF 0x"));Serial.print(_tnf, HEX);Serial.print(" ");
switch (_tnf) {
case TNF_EMPTY:
Serial.println(F("Empty"));
break;
case TNF_WELL_KNOWN:
Serial.println(F("Well Known"));
break;
case TNF_MIME_MEDIA:
Serial.println(F("Mime Media"));
break;
case TNF_ABSOLUTE_URI:
Serial.println(F("Absolute URI"));
break;
case TNF_EXTERNAL_TYPE:
Serial.println(F("External"));
break;
case TNF_UNKNOWN:
Serial.println(F("Unknown"));
break;
case TNF_UNCHANGED:
Serial.println(F("Unchanged"));
break;
case TNF_RESERVED:
Serial.println(F("Reserved"));
break;
default:
Serial.println();
}
Serial.print(F(" Type Length 0x"));Serial.print(_typeLength, HEX);Serial.print(" ");Serial.println(_typeLength);
Serial.print(F(" Payload Length 0x"));Serial.print(_payloadLength, HEX);;Serial.print(" ");Serial.println(_payloadLength);
if (_idLength)
{
Serial.print(F(" Id Length 0x"));Serial.println(_idLength, HEX);
}
Serial.print(F(" Type "));PrintHexChar(_type, _typeLength);
// TODO chunk large payloads so this is readable
Serial.print(F(" Payload "));PrintHexChar(_payload, _payloadLength);
if (_idLength)
{
Serial.print(F(" Id "));PrintHexChar(_id, _idLength);
}
Serial.print(F(" Record is "));Serial.print(getEncodedSize());Serial.println(" bytes");
}
// Note if buffer % blockSize != 0, last block will not be written
void DumpHex(const byte * data, const long numBytes, const unsigned int blockSize)
{
int i;
for (i = 0; i < (numBytes / blockSize); i++)
{
PrintHexChar(data, blockSize);
data += blockSize;
}
}
NdefMessage::NdefMessage(const byte * data, const int numBytes)
{
#ifdef NDEF_DEBUG
Serial.print(F("Decoding "));Serial.print(numBytes);Serial.println(F(" bytes"));
PrintHexChar(data, numBytes);
//DumpHex(data, numBytes, 16);
#endif
_recordCount = 0;
int index = 0;
while (index <= numBytes)
{
// decode tnf - first byte is tnf with bit flags
// see the NFDEF spec for more info
byte tnf_byte = data[index];
bool mb = (tnf_byte & 0x80) != 0;
bool me = (tnf_byte & 0x40) != 0;
bool cf = (tnf_byte & 0x20) != 0;
bool sr = (tnf_byte & 0x10) != 0;
bool il = (tnf_byte & 0x8) != 0;
byte tnf = (tnf_byte & 0x7);
NdefRecord record = NdefRecord();
record.setTnf(tnf);
index++;
int typeLength = data[index];
int payloadLength = 0;
if (sr)
{
index++;
payloadLength = data[index];
}
else
{
payloadLength =
((0xFF & data[++index]) << 24)
| ((0xFF & data[++index]) << 16)
| ((0xFF & data[++index]) << 8)
| (0xFF & data[++index]);
}
int idLength = 0;
if (il)
{
index++;
idLength = data[index];
}
index++;
record.setType(&data[index], typeLength);
index += typeLength;
if (il)
{
record.setId(&data[index], idLength);
index += idLength;
}
record.setPayload(&data[index], payloadLength);
index += payloadLength;
addRecord(record);
if (me) break; // last message
}
}
