/// <summary>
/// Read DLMS Data from the device.
/// </summary>
/// <param name="data">Data to send.</param>
/// <returns>Received data.</returns>
public void ReadDLMSPacket(byte[] data, GXReplyData reply)
{
if (data == null)
{
return;
}
reply.Error = 0;
object eop = (byte)0x7E;
//In network connection terminator is not used.
if (Client.InterfaceType == InterfaceType.WRAPPER && Media is GXNet)
{
eop = null;
}
int pos = 0;
bool succeeded = false;
ReceiveParameters <byte[]> p = new ReceiveParameters <byte[]>()
{
Eop = eop,
Count = 5,
WaitTime = WaitTime,
};
lock (Media.Synchronous)
{
while (!succeeded && pos != 3)
{
WriteTrace("<- " + DateTime.Now.ToLongTimeString() + "\t" + GXCommon.ToHex(data, true));
Media.Send(data, null);
succeeded = Media.Receive(p);
if (!succeeded)
{
//If Eop is not set read one byte at time.
if (p.Eop == null)
{
p.Count = 1;
}
//Try to read again...
if (++pos != 3)
{
System.Diagnostics.Debug.WriteLine("Data send failed. Try to resend " + pos.ToString() + "/3");
continue;
}
throw new Exception("Failed to receive reply from the device in given time.");
}
}
try
{
//Loop until whole COSEM packet is received.
while (!Client.GetData(p.Reply, reply))
{
//If Eop is not set read one byte at time.
if (p.Eop == null)
{
p.Count = 1;
}
while (!Media.Receive(p))
{
//If echo.
if (p.Reply.Length == data.Length)
{
Media.Send(data, null);
}
//Try to read again...
if (++pos != 3)
{
System.Diagnostics.Debug.WriteLine("Data send failed. Try to resend " + pos.ToString() + "/3");
continue;
}
throw new Exception("Failed to receive reply from the device in given time.");
}
}
}
catch (Exception ex)
{
WriteTrace("-> " + DateTime.Now.ToLongTimeString() + "\t" + GXCommon.ToHex(p.Reply, true));
throw ex;
}
}
WriteTrace("-> " + DateTime.Now.ToLongTimeString() + "\t" + GXCommon.ToHex(p.Reply, true));
if (reply.Error != 0 && reply.Error != (short)ErrorCode.Rejected)
{
throw new GXDLMSException(reply.Error);
}
}
