/// <summary>
/// Continue get Hart-IP Response from the connected stream.
/// Remove the received request from the list and release the
/// MsgResponse lock signal.
/// </summary>
private void ReceiveMsg()
{
bool stoploop;
lock (SyncRoot)
{
stoploop = m_bStopped;
}
while (!stoploop)
{
try
{
HartIPResponse Rsp = GetResponse();
if (Rsp == null)
{
continue;
}
m_lLastActivityTime = DateTime.Now.Ticks;
if (Rsp.MessageType == HARTIPMessage.HART_ACK)
{
MsgRequest Req = DequeueRequest(Rsp.TransactionId);
if (Req != null)
{
Req.Response.SetResponse(Rsp);
}
else
{
// just in case can't find the request in the list
LogMsg.Instance.Log(Rsp.ToString());
}
}
else
{
if ((Rsp.MessageType == HARTIPMessage.HART_PUBLISH_NOTIFY) &&
(PublishedCmdNotify != null))
{
HartIPResponseArg Arg = new HartIPResponseArg(Rsp);
PublishedCmdNotify(this, Arg);
}
else
{
LogMsg.Instance.Log(Rsp.ToString());
}
}
}
catch (SocketException se)
{
int nErrorCode = se.ErrorCode;
// socket receive timeout
if ((nErrorCode == 10060) || (nErrorCode == 10035))
{
if (m_nConnection != UDP)
{
break;
}
}
// socket closed, server close the connection or interrupted
else if ((nErrorCode == 995) || (nErrorCode == 10004) || (nErrorCode == 10054))
{
break;
}
else
{
LogMsg.Instance.Log("Error, ReceiveMsg SocketException: ErrorCode:" +
nErrorCode + ". " + se.Message, true);
break;
}
}
catch (EndOfStreamException e)
{
LogMsg.Instance.Log("Error, ReceiveMsg EndOfStreamException: " + e.Message, true);
break;
}
catch (IOException io)
{
if (m_nConnection != TCP)
{
LogMsg.Instance.Log("Error, ReceiveMsg IOException: " + io.Message, true);
break;
}
}
catch (ObjectDisposedException obex)
{
LogMsg.Instance.Log("Error, ReceiveMsg Expection :" + obex.Message, true);
break;
}
catch (ThreadStateException tsEx)
{
// caller failed to release the lock signal and it will timeout
LogMsg.Instance.Log("Error, ReceiveMsg ThreadStateException: " + tsEx.Message, true);
}
}
ClearRequests();
}
/// <summary>
/// Send a Hart Request and it handles Delay Retry.
/// If no more dr retry, it sends nerwork HART device a flush Dr cmd.
/// </summary>
/// <param name="Request"><see cref="HartIPRequest"/></param>
/// <returns><see cref="HartIPResponse"/></returns>
public HartIPResponse SendHartRequest(HartIPRequest Request)
{
HartIPResponse Rsp = null;
if (Request == null)
{
throw new ArgumentException("HartIPRequest is null");
}
if ((m_HartIPConn == null) || !m_HartIPConn.IsConnected)
{
throw new Exception("Call Connect to initialize the network connection first.");
}
lock (SyncRoot)
{
m_Error = String.Empty;
// send the first request
Rsp = SendRequest(Request);
if (Rsp != null)
{
Logger.Log(Rsp.ToString());
}
if ((Rsp != null) &&
((Rsp.ResponseCode == HARTIPMessage.RSP_DR_INITIATE) ||
(Rsp.ResponseCode == HARTIPMessage.RSP_DR_CONFLICT) ||
(Rsp.ResponseCode == HARTIPMessage.RSP_DR_RUNNING) ||
(Rsp.ResponseCode == HARTIPMessage.RSP_DEVICE_BUSY)))
{
if (m_nDrRetries > 0)
{
Rsp = null;
// Create a request task to store the request and retries values.
RequestTask ReqTask = new RequestTask(Request, m_nDrRetries,
m_nDrRetryDelay);
// Create a request worker to do the task with the callback to handles the retries.
RequestWorker ReqWorker = new RequestWorker(ReqTask,
new RequestWorker.HandleSendRequestDelegate(HandleSendHARTIPRequest));
try
{
// start the task
ReqWorker.Perform();
Rsp = ReqTask.HartIPRsp;
}
catch (UserCancelException)
{
// user canceled action
m_Error = "User canceled sending retries command.";
}
}
else
{
SendFlushDrCmd();
}
}
}
// if (Rsp.Command == 77)
// { // unwrap the HART PDU in the response data
// Rsp
// }
return(Rsp);
}
/// <summary>
/// Initiate session with the network HART-IP device.
/// </summary>
/// <returns>bool</returns>
private bool InitSession()
{
bool bSuccess = false;
HartIPResponse Response = null;
do
{
// create init session request
HartIPRequest Request = HartIPRequest.InitiateSession(TransactionId, m_InactivityCloseTime);
if (!SendHartIPRequest(Request))
{
LogMsg.Instance.Log("Error, sending InitSession request failure.", true);
Close();
break;
}
try
{
Response = GetResponse();
}
catch (SocketException se)
{
m_Error = String.Format("InitSession SocketException: ErrorCode:{0}. {1}.",
se.ErrorCode, se.Message);
LogMsg.Instance.Log("Error, " + m_Error, true);
Close();
break;
}
catch (Exception ex)
{
m_Error = String.Format("InitSession Exception: {0}", ex.Message);
LogMsg.Instance.Log("Error, " + m_Error, true);
Close();
break;
}
if (Response == null)
{
m_Error = "Initiate Session failed getting response.";
LogMsg.Instance.Log("Error, " + m_Error, true);
Close();
break;
}
else if (0 != Response.ResponseCode)
{
m_Error = "InitSession received an error response code: " +
Response.ResponseCode.ToString() + " " +
GetSessionInitStatusCode(Response.ResponseCode);
LogMsg.Instance.Log("Error, " + m_Error, true);
LogMsg.Instance.Log(Response.ToString());
Close();
break;
}
else if (!Response.IsValidResponse)
{
m_Error = "InitSession received an invalid response Msg Type.";
LogMsg.Instance.Log("Error, " + m_Error, true);
LogMsg.Instance.Log(Response.ToString());
Close();
break;
}
LogMsg.Instance.Log(Response.ToString());
bSuccess = (Response.Status == HARTIPMessage.RSP_SUCCESS ||
Response.Status == HARTIPMessage.RSP_SET_TO_NEAREST_POSSIBLE_VALUE) ? true : false;
} while (false); /* ONCE */
return(bSuccess);
}
/// <summary>
/// Send HART device a command 84.
/// </summary>
/// <param name="Dev"><see cref="HartDevice"/></param>
/// <param name="usDeviceIndex">ushort</param>
/// <returns><see cref="HartDevice"/></returns>
private HartDevice SendCmd84(HartDevice Dev, ushort usDeviceIndex)
{
HartDevice HDevice = null;
ushort usDeviceType;
uint nDeviceId;
byte[] Req = new byte[11];
HartIPResponse Rsp = null;
if (Dev != null)
{
usDeviceType = Dev.DeviceType;
nDeviceId = Dev.DeviceId;
// send cmd to HART Device get the device list
Req[0] = 0x82; // long frame
Req[1] = (byte)(((usDeviceType >> 8) & 0x3F) | 0x80);
Req[2] = (byte)(usDeviceType & 0x0ff);
Req[3] = (byte)((nDeviceId >> 16) & 0x0ff);
Req[4] = (byte)((nDeviceId >> 8) & 0x0ff);
Req[5] = (byte)(nDeviceId & 0x0ff);
Req[6] = HARTIPMessage.CMD_READ_SUB_DEVICE_IDENTITY; // cmd byte
Req[7] = 2; // byte count
Req[8] = (byte)((usDeviceIndex >> 8) & 0x0ff);
Req[9] = (byte)(usDeviceIndex & 0x0ff);
Req[10] = HartUtil.GetCheckSum(Req, 10); // get check sum byte
Rsp = SendHartRequest(Req, 11);
if (Rsp != null)
{
byte cDataCount = Rsp.DataCount;
if ((Rsp.ResponseCode != HARTIPMessage.RSP_SUCCESS) &&
(Rsp.Command != HARTIPMessage.CMD_READ_SUB_DEVICE_IDENTITY) ||
(cDataCount < 44))
{
m_Error = String.Format("{0} Received Cmd 84 invalid response from HART device.\r\n{1}",
HartUtil.GetTimeStamp(), Rsp.ToString());
Logger.Log(m_Error);
}
else
{
byte cIOCard, cChannel, cUniversalCmdRev;
byte[] Data = new byte[cDataCount];
Data = Rsp.Data;
int nIndex = 2;
ushort usSubDeviceType;
uint nSubDeviceId;
String Tag = String.Empty;
cIOCard = Data[nIndex++];
cChannel = Data[nIndex++];
// skip the MfgId (2 bytes)
nIndex += 2;
// get the device type
usSubDeviceType = (ushort)((Data[nIndex] << 8) + (Data[nIndex + 1] & 0x0ff));
nIndex += 2;
// get the device id
nSubDeviceId = (uint)((Data[nIndex] << 16) + (Data[nIndex + 1] << 8) +
(Data[nIndex + 2] & 0x0ff));
nIndex += 3;
// get the universal cmd rev
cUniversalCmdRev = Data[nIndex++];
// get the tag
for (int i = nIndex; i < (nIndex + HARTIPMessage.MAX_LONG_TAG_LENGTH); i++)
{
char ch = (char)(Data[i] & 0x00ff);
if (ch == 0)
{
break;
}
Tag += ch;
}
Tag = Tag.TrimEnd();
// if tag is empty, set it to 'Unknown' with its device type and device id similar to MAC address
if (Tag.Length == 0)
{
String strOUI = (cUniversalCmdRev >= 7) ? "00-1B-1E" : "00-00-00";
Tag = String.Format("Unknown ({0}-{1:X2}-{2:X2}-{3:X2}-{4:X2}-{5:X2})",
new object[] { strOUI,
(usSubDeviceType >> 8),
(usSubDeviceType & 0x0ff),
(nSubDeviceId >> 16 & 0x0ff),
(nSubDeviceId >> 8 & 0x0ff),
(nSubDeviceId & 0x0ff) });
}
// Create sub-device
HDevice = new HartDevice(usSubDeviceType, nSubDeviceId, cUniversalCmdRev, Dev);
HDevice.Name = Tag;
HDevice.IOCard = cIOCard;
HDevice.Channel = cChannel;
}
}
}
return(HDevice);
}
