/// <summary>
/// Raise tag detected event
/// </summary>
/// <param name="nfcTagType">NFC tag type</param>
/// <param name="conn">Connection instance to NFC tag</param>
private void OnTagDetected(NfcTagType nfcTagType, NfcTagConnection conn)
{
if (this.TagDetected != null)
{
this.TagDetected(this, new NfcTagEventArgs(nfcTagType, conn));
}
}
/// <summary>
/// Thread for tag detecting
/// </summary>
private void DetectionThread()
{
while (this.isRunning)
{
byte[] target = this.pn532.InListPassiveTarget(this.targetType);
// target detected
if (target != null)
{
switch (this.targetType)
{
case PN532.TargetType.Iso14443TypeA:
// no current tag set
if (this.nfcTagConn == null)
{
// get ATQA and SAK
byte[] ATQA = new byte[2];
Array.Copy(target, PN532.ISO14443A_SENS_RES_OFFSET + 2, ATQA, 0, ATQA.Length); // +2 for 4B and NbTg (pn532um.pdf, pag. 116)
byte SAK = target[PN532.ISO14443A_SEL_RES_OFFSET + 2]; // +2 for 4B and NbTg (pn532um.pdf, pag. 116)
// get tag ID
byte[] tagId = new byte[target[PN532.ISO14443A_IDLEN_OFFSET + 2]]; // +2 for 4B and NbTg (pn532um.pdf, pag. 116)
Array.Copy(target, PN532.ISO14443A_IDLEN_OFFSET + 2 + 1, tagId, 0, tagId.Length);
// check ATQA and SAK for Mifare Classic 1k
if (ATQA[0] == 0x00 && ATQA[1] == 0x04 && SAK == 0x08)
{
this.nfcTagType = NfcTagType.MifareClassic1k;
this.nfcTagConn = new NfcMifareTagConnection(this, tagId);
this.OnTagDetected(this.nfcTagType, this.nfcTagConn);
}
// check ATQA and SAK for Mifare Ultralight
else if (ATQA[0] == 0x00 && ATQA[1] == 0x44 && SAK == 0x00)
{
this.nfcTagType = NfcTagType.MifareUltralight;
this.nfcTagConn = new NfcMifareUlTagConnection(this, tagId);
this.OnTagDetected(this.nfcTagType, this.nfcTagConn);
}
}
break;
default:
break;
}
}
// no target detected
else
{
// if current tag set and no target detected...
if (this.nfcTagConn != null)
{
// ...current tag is lost
this.OnTagLost(this.nfcTagType, this.nfcTagConn);
this.nfcTagConn = null;
}
}
}
}
public void Open(NfcTagType nfcTagType)
{
this.nfcTagType = nfcTagType;
// map NFC tag type to PN532 target type (baud rate/protocol)
this.targetType = this.NfcToPN532Type(nfcTagType);
this.isRunning = true;
this.nfcTagConn = null;
// get info and configure PN532 ic
this.pn532.GetFirmwareVersion();
this.pn532.SAMConfiguration(PN532.SamMode.NormalMode, false);
// start thread for tag detection
this.detectionThread = new Thread(this.DetectionThread);
this.detectionThread.Start();
}
public async Task Open(NfcTagType nfcTagType)
{
this._nfcTagType = nfcTagType;
// map NFC tag type to PN532 target type (baud rate/protocol)
_targetType = NfcToPn532Type(nfcTagType);
_nfcTagConn = null;
// get info and configure PN532 ic
await _pn532.GetFirmwareVersion();
await _pn532.SAMConfiguration(PN532.SamMode.NormalMode, false);
_isRunning = true;
// start thread for tag detection
await Task.Factory.StartNew(DetectionThread,
CancellationToken.None,
TaskCreationOptions.LongRunning,
TaskScheduler.Default);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="nfcTagType">NFC tag type</param>
/// <param name="conn">Connection instance to NFC tag</param>
public NfcTagEventArgs(NfcTagType nfcTagType, NfcTagConnection conn)
{
this.NfcTagType = nfcTagType;
this.Connection = conn;
}
public void Close()
{
this.nfcTagConn = null;
this.isRunning = false;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="nfcTagType">NFC tag type</param>
/// <param name="conn">Connection instance to NFC tag</param>
public NfcTagEventArgs(NfcTagType nfcTagType, NfcTagConnection conn)
{
this.NfcTagType = nfcTagType;
this.Connection = conn;
}
public void Close()
{
_pn532.Close();
_nfcTagConn = null;
_isRunning = false;
}
/// <summary>
/// Raise tag lost event
/// </summary>
/// <param name="nfcTagType">NFC tag type</param>
/// <param name="conn">Connection instance to NFC tag</param>
private void OnTagLost(NfcTagType nfcTagType, NfcTagConnection conn)
{
TagLost?.Invoke(this, new NfcTagEventArgs(nfcTagType, conn));
}
/// <summary>
/// Thread for tag detecting
/// </summary>
private async Task DetectionThread()
{
while (_isRunning)
{
try
{
var target = await _pn532.InListPassiveTarget(_targetType);
// target detected
if (target != null)
{
switch (_targetType)
{
case PN532.TargetType.Iso14443TypeA:
// no current tag set
if (_nfcTagConn == null)
{
// get ATQA and SAK
byte[] atqa = new byte[2];
Array.Copy(target, PN532.ISO14443A_SENS_RES_OFFSET + 2, atqa, 0, atqa.Length); // +2 for 4B and NbTg (pn532um.pdf, pag. 116)
byte sak = target[PN532.ISO14443A_SEL_RES_OFFSET + 2]; // +2 for 4B and NbTg (pn532um.pdf, pag. 116)
// get tag ID
byte[] tagId = new byte[target[PN532.ISO14443A_IDLEN_OFFSET + 2]]; // +2 for 4B and NbTg (pn532um.pdf, pag. 116)
Array.Copy(target, PN532.ISO14443A_IDLEN_OFFSET + 2 + 1, tagId, 0, tagId.Length);
// check ATQA and SAK for Mifare Classic 1k
if (atqa[0] == 0x00 && atqa[1] == 0x04 && sak == 0x08)
{
_nfcTagType = NfcTagType.MifareClassic1K;
_nfcTagConn = new NfcMifareTagConnection(this, tagId);
OnTagDetected(_nfcTagType, _nfcTagConn);
}
// check ATQA and SAK for Mifare Ultralight
else if (atqa[0] == 0x00 && atqa[1] == 0x44 && sak == 0x00)
{
_nfcTagType = NfcTagType.MifareUltralight;
_nfcTagConn = new NfcMifareUlTagConnection(this, tagId);
OnTagDetected(_nfcTagType, _nfcTagConn);
}
}
break;
default:
break;
}
}
// no target detected
else
{
// if current tag set and no target detected...
if (_nfcTagConn != null)
{
// ...current tag is lost
OnTagLost(_nfcTagType, _nfcTagConn);
_nfcTagConn = null;
}
}
}
catch (Exception)
{
//TODO LOG ex
_isRunning = false;
}
}
}
public void Open(NfcTagType nfcTagType)
{
this.nfcTagType = nfcTagType;
// map NFC tag type to PN532 target type (baud rate/protocol)
this.targetType = this.NfcToPN532Type(nfcTagType);
this.isRunning = true;
this.nfcTagConn = null;
// get info and configure PN532 ic
this.pn532.GetFirmwareVersion();
this.pn532.SAMConfiguration(PN532.SamMode.NormalMode, false);
// start thread for tag detection
this.detectionThread = new Thread(this.DetectionThread);
this.detectionThread.Start();
}
public void Close()
{
this.nfcTagConn = null;
this.isRunning = false;
}
/// <summary>
/// Raise tag lost event
/// </summary>
/// <param name="nfcTagType">NFC tag type</param>
/// <param name="conn">Connection instance to NFC tag</param>
private void OnTagLost(NfcTagType nfcTagType, NfcTagConnection conn)
{
if (this.TagLost != null)
this.TagLost(this, new NfcTagEventArgs(nfcTagType, conn));
}
/// <summary>
/// Raise tag detected event
/// </summary>
/// <param name="nfcTagType">NFC tag type</param>
/// <param name="conn">Connection instance to NFC tag</param>
private void OnTagDetected(NfcTagType nfcTagType, NfcTagConnection conn)
{
if (this.TagDetected != null)
this.TagDetected(this, new NfcTagEventArgs(nfcTagType, conn));
}
/// <summary>
/// Thread for tag detecting
/// </summary>
private void DetectionThread()
{
while (this.isRunning)
{
byte[] target = this.pn532.InListPassiveTarget(this.targetType);
// target detected
if (target != null)
{
switch (this.targetType)
{
case PN532.TargetType.Iso14443TypeA:
// no current tag set
if (this.nfcTagConn == null)
{
// get ATQA and SAK
byte[] ATQA = new byte[2];
Array.Copy(target, PN532.ISO14443A_SENS_RES_OFFSET + 2, ATQA, 0, ATQA.Length); // +2 for 4B and NbTg (pn532um.pdf, pag. 116)
byte SAK = target[PN532.ISO14443A_SEL_RES_OFFSET + 2]; // +2 for 4B and NbTg (pn532um.pdf, pag. 116)
// get tag ID
byte[] tagId = new byte[target[PN532.ISO14443A_IDLEN_OFFSET + 2]]; // +2 for 4B and NbTg (pn532um.pdf, pag. 116)
Array.Copy(target, PN532.ISO14443A_IDLEN_OFFSET + 2 + 1, tagId, 0, tagId.Length);
// check ATQA and SAK for Mifare Classic 1k
if (ATQA[0] == 0x00 && ATQA[1] == 0x04 && SAK == 0x08)
{
this.nfcTagType = NfcTagType.MifareClassic1k;
this.nfcTagConn = new NfcMifareTagConnection(this, tagId);
this.OnTagDetected(this.nfcTagType, this.nfcTagConn);
}
// check ATQA and SAK for Mifare Ultralight
else if (ATQA[0] == 0x00 && ATQA[1] == 0x44 && SAK == 0x00)
{
this.nfcTagType = NfcTagType.MifareUltralight;
this.nfcTagConn = new NfcMifareUlTagConnection(this, tagId);
this.OnTagDetected(this.nfcTagType, this.nfcTagConn);
}
}
break;
default:
break;
}
}
// no target detected
else
{
// if current tag set and no target detected...
if (this.nfcTagConn != null)
{
// ...current tag is lost
this.OnTagLost(this.nfcTagType, this.nfcTagConn);
this.nfcTagConn = null;
}
}
}
}
