/// <summary>
/// The open method tries to connect to both busses to see if one of them is connected and
/// active. The first strategy is to listen for any CAN message. If this fails there is a
/// check to see if the application is started after an interrupted flash session. This is
/// done by sending a message to set address and length (only for P-bus).
/// </summary>
/// <returns>OpenResult.OK is returned on success. Otherwise OpenResult.OpenError is
/// returned.</returns>
override public OpenResult open()
{
if (m_deviceHandle != 0)
{
close();
}
m_deviceHandle = LAWICEL.canusb_Open(IntPtr.Zero,
"0x40:0x37",
LAWICEL.CANUSB_ACCEPTANCE_CODE_ALL,
LAWICEL.CANUSB_ACCEPTANCE_MASK_ALL,
LAWICEL.CANUSB_FLAG_TIMESTAMP);
if (m_deviceHandle > 0)
{
LAWICEL.canusb_Flush(m_deviceHandle, 0x01);
Console.WriteLine("Creating new reader thread");
m_readThread = new Thread(readMessages);
try
{
m_readThread.Priority = ThreadPriority.Normal; // realtime enough
}
catch (Exception E)
{
Console.WriteLine(E.Message);
}
if (m_readThread.ThreadState == ThreadState.Unstarted)
{
m_readThread.Start();
}
return(OpenResult.OK);
}
else
{
// second try after unload of dlls?
//close();
return(OpenResult.OpenError);
}
}
override public void clearReceiveBuffer()
{
LAWICEL.canusb_Flush(m_deviceHandle, (byte)(FlushFlags.FLUSH_DONTWAIT | FlushFlags.FLUSH_EMPTY_INQUEUE));
}
override public void clearTransmitBuffer()
{
LAWICEL.canusb_Flush(m_deviceHandle, (byte)FlushFlags.FLUSH_DONTWAIT);
}
public override void Flush()
{
LAWICEL.canusb_Flush(m_deviceHandle, 0x01);
LAWICEL.canusb_Flush(m_deviceHandle, 0x03);
}