//1C帧的接收处理
private void ComRecvProc()
{
//string strRecv = serialPort.ReadExisting();
byte[] buf = new byte[recvMax];
while (!recvExit)
{
Thread.Sleep(recvInterval);
// Console.WriteLine("begin recv:");
if (!serialPort.IsOpen || (!isConnect))
{
continue;
}
int recvLen = 0;
try
{
recvLen = serialPort.Read(buf, 0, 128);
for (int i = 0; i < recvLen; i++)
{
// Console.WriteLine("recv:0x{0}",buf[i].ToString("X2"));
if (recvBytes >= recvMax)
{
break;
}
switch (buf[i])
{
case STX:
{
Array.Clear(recvBuffer, 0, recvBuffer.Count());
recvBytes = 0;
recvBegin = true;
this.currentRecvType = RecvPackageType.RECV_STX;
recvBuffer[recvBytes++] = buf[i];
break;
}
case ACK:
{
Array.Clear(recvBuffer, 0, recvBuffer.Count());
recvBytes = 0;
recvBegin = true;
this.currentRecvType = RecvPackageType.RECV_ACK;
recvBuffer[recvBytes++] = buf[i];
break;
}
case ETX:
{
responseOk = true;
recvBegin = false;
recvBuffer[recvBytes++] = buf[i];
recvAutoEvent.Set();
serialPort.DiscardInBuffer();
break;
}
case NAK:
{
//Console.Write("recv from plc: NAK " + recvLen.ToString());
responseOk = false;
recvAutoEvent.Set();
// AddLog("FX PLC 站号:" + plcStationNumber + ",收到NAK 错误应答", EnumLogType.错误);
//if (eventLinkLost != null)
//{
// eventLinkLost.Invoke(this, null);
//}
break;
}
default:
{
if (recvBegin)
{
recvBuffer[recvBytes++] = buf[i];
}
else
{
string log = string.Format("FX PLC 站号{0},通信错误,未收到STX或ACK起始标志符，收到无效数据：buf[{1}]={2}", plcStationNumber, i, buf[i]);
//AddLog(log, EnumLogType.错误);
serialPort.DiscardInBuffer();
//if (eventLinkLost != null)
//{
// eventLinkLost.Invoke(this, null);
//}
}
if ((this.currentRecvType == RecvPackageType.RECV_ACK) && (recvBytes == 5))
{
//应答包结束
responseOk = true;
recvBegin = false;
recvAutoEvent.Set();
serialPort.DiscardInBuffer();
}
break;
}
}
}
}
catch (System.Exception ex)
{
serialPort.Close();
isConnect = false;
//AddLog("FX PLC 站号:"+plcStationNumber+",接收数据遇到异常："+ex.ToString(), EnumLogType.错误);
//if (eventLinkLost != null)
//{
// eventLinkLost.Invoke(this, null);
//}
}
if (recvLen > 0 && comRecvHandler != null)
{
byte[] recvBytesReal = new byte[recvLen];
Array.Copy(buf, recvBytesReal, recvLen);
ComRwBytesEventArgs args = new ComRwBytesEventArgs();
args.buf = recvBytesReal;
comRecvHandler.Invoke(this, args);
}
}
}
/// <summary>
/// 4C帧，报文格式5的接收处理
/// </summary>
private void ComRecvProc2()
{
byte[] buf = new byte[recvMax];
while (!recvExit)
{
Thread.Sleep(recvInterval);
if (!serialPort.IsOpen || (!isConnect))
{
continue;
}
int recvLen = 0;
try
{
recvLen = serialPort.Read(buf, 0, 128);
for (int i = 0; i < recvLen; i++)
{
if (recvBytes >= recvMax)
{
break;
}
switch (buf[i])
{
case STX:
{
Array.Clear(recvBuffer, 0, recvBuffer.Count());
recvBytes = 0;
responseOk = false;
recvBegin = true;
this.currentRecvType = RecvPackageType.RECV_STX;
recvBuffer[recvBytes++] = buf[i];
break;
}
case ETX:
{
responseOk = true;
recvBegin = false;
recvBuffer[recvBytes++] = buf[i];
recvAutoEvent.Set();
serialPort.DiscardInBuffer();
break;
}
default:
{
if (recvBegin)
{
recvBuffer[recvBytes++] = buf[i];
}
break;
}
}
}
if (recvLen > 0 && comRecvHandler != null)
{
byte[] recvBytesReal = new byte[recvLen];
Array.Copy(buf, recvBytesReal, recvLen);
ComRwBytesEventArgs args = new ComRwBytesEventArgs();
args.buf = recvBytesReal;
comRecvHandler.Invoke(this, args);
}
}
catch (Exception)
{
serialPort.Close();
isConnect = false;
throw;
}
}
}
