/// <summary>
/// Writes a block of data to the MFRC522 reader.
/// </summary>
/// <param name="blockNumber">The number of the block to write data to.</param>
/// <param name="uid">The MFRC522 tag to write data to.</param>
/// <param name="keyA">The first key to use while writing.</param>
/// <param name="keyB">The second key to use while writing.</param>
/// <returns>true if the data was written; false otherwise.</returns>
public bool WriteBlock(byte blockNumber, TagUid uid, byte[] data, byte[] keyA = null, byte[] keyB = null)
{
if (keyA != null)
{
Authenticate(PiccCommands.AuthenticateKeyA, blockNumber, uid, keyA);
}
else if (keyB != null)
{
Authenticate(PiccCommands.AuthenticateKeyB, blockNumber, uid, keyB);
}
else
{
return(false);
}
//Write block
Transceive(true, PiccCommands.Write, blockNumber);
if (ReadFromFifo() != PiccResponses.Acknowledge)
{
return(false);
}
//Make sure we write only 16 bytes
var buffer = new byte[MaxBlockLength];
data.CopyTo(buffer, 0);
Transceive(true, buffer);
return(ReadFromFifo() == PiccResponses.Acknowledge);
}
/// <summary>
/// Selects a MFRC522 tag.
/// </summary>
/// <param name="uid">The tag to be selected.</param>
/// <returns>true if the specified tag was selected; false otherwise.</returns>
public bool SelectTag(TagUid uid)
{
//Send Select command to tag
var data = new byte[7];
data[0] = PiccCommands.Select1;
data[1] = PiccCommands.Select2;
uid.FullUid.CopyTo(data, 2);
Transceive(true, data);
return(GetFifoLevel() == 1 && ReadFromFifo() == PiccResponses.SelectAcknowledge);
}
private void Authenticate(byte command, byte blockNumber, TagUid uid, [ReadOnlyArray] byte[] key)
{
//Put reader in Idle mode
WriteRegister(MFRC522Registers.Command, PcdCommands.Idle);
//Clear the FIFO
SetRegisterBits(MFRC522Registers.FifoLevel, 0x80);
//Create Authentication packet
var data = new byte[AuthenticationPacketLength];
data[0] = command;
data[1] = (byte)(blockNumber & 0xFF);
key.CopyTo(data, 2);
uid.Bytes.CopyTo(data, 8);
WriteToFifo(data);
//Put reader in MfAuthent mode
WriteRegister(MFRC522Registers.Command, PcdCommands.Authenticate);
}
/// <summary>
/// Reads a block of data from the MFRC522 reader.
/// </summary>
/// <param name="blockNumber">The number of the block to read data from.</param>
/// <param name="uid">The MFRC522 tag to read data from.</param>
/// <param name="keyA">The first key to use while reading.</param>
/// <param name="keyB">The second key to use while reading.</param>
/// <returns>The data read.</returns>
public byte[] ReadBlock(byte blockNumber, TagUid uid, byte[] keyA = null, byte[] keyB = null)
{
if (keyA != null)
{
Authenticate(PiccCommands.AuthenticateKeyA, blockNumber, uid, keyA);
}
else if (keyB != null)
{
Authenticate(PiccCommands.AuthenticateKeyB, blockNumber, uid, keyB);
}
else
{
return(null);
}
//Read block
Transceive(true, PiccCommands.Read, blockNumber);
return(ReadFromFifo(MaxBlockLength));
}
private void Authenticate(byte command, byte blockNumber, TagUid uid, [ReadOnlyArray] byte[] key)
{
//Put reader in Idle mode
WriteRegister(MFRC522Registers.Command, PcdCommands.Idle);
//Clear the FIFO
SetRegisterBits(MFRC522Registers.FifoLevel, 0x80);
//Create Authentication packet
var data = new byte[AuthenticationPacketLength];
data[0] = command;
data[1] = (byte)(blockNumber & 0xFF);
key.CopyTo(data, 2);
uid.Bytes.CopyTo(data, 8);
WriteToFifo(data);
//Put reader in MfAuthent mode
WriteRegister(MFRC522Registers.Command, PcdCommands.Authenticate);
}
/// <summary>
/// Writes a block of data to the MFRC522 reader.
/// </summary>
/// <param name="blockNumber">The number of the block to write data to.</param>
/// <param name="uid">The MFRC522 tag to write data to.</param>
/// <param name="keyA">The first key to use while writing.</param>
/// <param name="keyB">The second key to use while writing.</param>
/// <returns>true if the data was written; false otherwise.</returns>
public bool WriteBlock(byte blockNumber, TagUid uid, byte[] data, byte[] keyA = null, byte[] keyB = null)
{
if (keyA != null)
{
Authenticate(PiccCommands.AuthenticateKeyA, blockNumber, uid, keyA);
}
else if (keyB != null)
{
Authenticate(PiccCommands.AuthenticateKeyB, blockNumber, uid, keyB);
}
else
{
return false;
}
//Write block
Transceive(true, PiccCommands.Write, blockNumber);
if (ReadFromFifo() != PiccResponses.Acknowledge)
{
return false;
}
//Make sure we write only 16 bytes
var buffer = new byte[MaxBlockLength];
data.CopyTo(buffer, 0);
Transceive(true, buffer);
return ReadFromFifo() == PiccResponses.Acknowledge;
}
/// <summary>
/// Reads a block of data from the MFRC522 reader.
/// </summary>
/// <param name="blockNumber">The number of the block to read data from.</param>
/// <param name="uid">The MFRC522 tag to read data from.</param>
/// <param name="keyA">The first key to use while reading.</param>
/// <param name="keyB">The second key to use while reading.</param>
/// <returns>The data read.</returns>
public byte[] ReadBlock(byte blockNumber, TagUid uid, byte[] keyA = null, byte[] keyB = null)
{
if (keyA != null)
{
Authenticate(PiccCommands.AuthenticateKeyA, blockNumber, uid, keyA);
}
else if (keyB != null)
{
Authenticate(PiccCommands.AuthenticateKeyB, blockNumber, uid, keyB);
}
else
{
return null;
}
//Read block
Transceive(true, PiccCommands.Read, blockNumber);
return ReadFromFifo(MaxBlockLength);
}
/// <summary>
/// Selects a MFRC522 tag.
/// </summary>
/// <param name="uid">The tag to be selected.</param>
/// <returns>true if the specified tag was selected; false otherwise.</returns>
public bool SelectTag(TagUid uid)
{
//Send Select command to tag
var data = new byte[7];
data[0] = PiccCommands.Select1;
data[1] = PiccCommands.Select2;
uid.FullUid.CopyTo(data, 2);
Transceive(true, data);
return GetFifoLevel() == 1 && ReadFromFifo() == PiccResponses.SelectAcknowledge;
}
/// <summary>
/// Raises the <see cref="StartPageLogic.NewResponse"/> event.
/// </summary>
/// <param name="tagUid">The response to be included in the event data.</param>
private void RaiseNewTagEvent(TagUid tagUid)
{
if (TagPresent != null)
{
TagPresent(this, new TagPresentEventArgs(tagUid));
}
}
public async Task SendTagToServerAsync(TagUid tag)
{
await SendAuthRequestAsync(new AuthRequest() { TagId = tag.ToString(), CarPlate = "", ParkingCNPJ = "46.451.585/0001-67" });
}
