/* This method sends an R-Nack block to the specified reader */
private bool SendRNackBlock(SpringCardIWM2_Serial_Reader reader)
{
byte[] data = new byte[5];
data[0] = ASCII_STX;
data[1] = (byte) (IWM2_MK2_PROTO_R_NACK | reader.block_number);
data[2] = reader.GetAddress();
data[3] = CalculateLRC(data, 3);
data[4] = ASCII_ETX;
byte out_len = 0;
byte[] res = EscapeForbiddenBytes(data, 5, out out_len);
if (show_frames)
LogByteArrayEmitted(res, out_len);
try
{
port.Write(res, 0, out_len);
Thread.Sleep(1); /* slow down the bus */
} catch (Exception)
{
return false;
}
return true;
}
/* This method sends an I-Block with a payload to the specified reader */
private bool SendIBlock(SpringCardIWM2_Serial_Reader reader, byte[] payload)
{
byte[] data;
byte offset = 0;
if (payload == null)
data = new byte[5];
else
data = new byte[5 + payload.Length];
data[offset++] = ASCII_STX;
data[offset++] = (byte) (IWM2_MK2_PROTO_I_BLOCK | reader.block_number);
data[offset++] = reader.GetAddress();
if (payload != null)
for (byte i=0; i<payload.Length; i++)
data[offset++] = payload[i];
data[offset] = CalculateLRC(data, offset);
offset++;
data[offset++] = ASCII_ETX;
byte out_len = 0;
byte[] res = EscapeForbiddenBytes(data, offset, out out_len);
if (show_frames)
LogByteArrayEmitted(res, out_len);
try
{
port.Write(res, 0, out_len);
Thread.Sleep(1); /* slow down the bus */
} catch (Exception)
{
return false;
}
return true;
}
