private void J2534InterfaceItem_Click(object sender, EventArgs e)
{
ToolStripItem caller = (ToolStripItem)sender;
if (Connection != null)
{
Connection.TryCleanup();
}
Connection = new ECUConnection(caller.Tag.ToString(), caller.Text);
Connection.ConnectionStateChangeEvent += ConnectionStateChangedHandler;
Connection.OpenDevice();
// loadtree should not be necessary if the prior state was disconnected
// LoadTree();
}
// FIN = Fahrzeug-Identifizierungs-Nummer
// VIN = Vehicle Identification Number
public static bool TryReadChassisNumber(ECUConnection connection, out string chassisNumber)
{
chassisNumber = "";
// we need a existing hardware connection to a J2534 device
if (connection is null)
{
return(false);
}
if (connection.IsSimulation())
{
return(false);
}
if (connection.ConnectionDevice is null)
{
// no valid j2534 device initialized yet, can't do anything
return(false);
}
bool connectionWasEstablished = connection.ConnectionProtocol != null;
// if the connection is already open, we can use the protocol's vin query
int[] baudratesToTest = new int[] { 500000, 800000 };
foreach (int baudrateToTest in baudratesToTest)
{
// if there is an established connection (i.e. already connected and identified a target, do not reconfigure the connection
if (!connectionWasEstablished)
{
SetupConnectionForBaud(connection, baudrateToTest);
}
// try KW2C3PE first, since it is a legacy protocol; UDS seems to be somewhat aware, and deliberately avoids known KW2C3PE identifiers
if (TryReadKW2C3PEChassisNumber(connection, out string KW2C3PEChassisNumber))
{
chassisNumber = KW2C3PEChassisNumber;
return(true);
}
if (TryReadUDSChassisNumber(connection, out string udsChassisNumber))
{
chassisNumber = udsChassisNumber;
return(true);
}
// if there's an established connection that failed both UDS/KW2C3PE, the loop is no longer required
if (connection.ConnectionProtocol != null)
{
return(false);
}
}
// if a connection was unavailable, it would have been established earlier on; clean it up
if (!connectionWasEstablished)
{
connection.TryCleanup();
connection = null;
}
return(false);
}
