private void timer1_Tick(object sender, EventArgs e)
{
string errmsg = "";
timer1.Stop();
// Handle device plug/unplug events
YAPI.UpdateDeviceList(ref errmsg);
YAPI.HandleEvents(ref errmsg);
if (spiPort != null)
{
// Yocto-SPI connected, check if a card swipe message was received
List <string> msgs = spiPort.readMessages("", 1);
if (DEBUG)
{
for (int i = 0; i < msgs.Count; i++)
{
Log("Read: " + msgs[i]);
}
}
if (msgs.Count > 0)
{
// Decode ABA Track 2 data from magnetic card
string track2 = this.DecodeTrack2(msgs[0]);
string firstChar = track2.Substring(0, 1);
string lastChar = track2.Substring(track2.Length - 1);
Log("Track 2: " + track2);
if (firstChar == "!")
{
card_id.Text = "Error !";
card_exp.Text = "";
card_extra.Text = track2.Substring(2);
}
else if (firstChar == ";" && lastChar == "?")
{
int separator = track2.IndexOf("=");
string ident = track2.Substring(1, separator - 1);
for (int i = 4; i < ident.Length; i += 5)
{
ident = ident.Insert(i, " ");
}
card_id.Text = ident;
card_exp.Text = track2.Substring(separator + 3, 2) + "/" + track2.Substring(separator + 1, 2);
card_extra.Text = track2.Substring(separator + 8, track2.Length - separator - 9);
}
else
{
card_id.Text = "Error !";
card_exp.Text = "";
card_extra.Text = "Bad format, may be a reverse swipe ?";
}
// Clear read buffer to catch next swipe
spiPort.reset();
}
}
timer1.Start();
}
public void ArrivalCallback(YModule module)
{
// Check if the device features a SPI Port
for (int i = 0; i < module.functionCount(); i++)
{
if (module.functionType(i) == "SpiPort")
{
// SPI Port found, use it
string identifier = module.get_serialNumber() + "." + module.functionId(i);
Log("Using " + identifier);
spiPort = YSpiPort.FindSpiPort(identifier);
spiPort.set_spiMode("0,0,lsb");
spiPort.reset();
}
}
}
private bool SendAndReceive(string[] commands, out Frame[] result)
{
int i;
bool success = true;
spiPort.reset();
for (i = 0; i < commands.Length; i++)
{
spiPort.writeHex(commands[i]);
}
// append an extra command to read result of the last command
spiPort.writeHex(READ_ID);
// wait for the result of all commands to come
int expectedLength = commands.Length * 4;
while (spiPort.read_avail() < expectedLength)
{
string errmsg = "";
YAPI.Sleep(3, ref errmsg);
}
string hexstr = spiPort.readHex(2 * expectedLength);
// Parse result
result = new Frame[commands.Length];
for (i = 0; i < commands.Length; i++)
{
Frame query = new Frame(commands[i]);
result[i] = new Frame(hexstr.Substring(8 + 8 * i, 8));
if (result[i].crc_error || result[i].addr != query.addr)
{
success = false;
}
_chip_ready = (result[i].rs == 1);
}
return(success);
}
