// 从并口读取数据
public bool ReadPort(int NumBytes, ref byte[] commRead)
{
if (hComm == INVALID_HANDLE_VALUE)
{
return(false);
}
COMSTAT ComStat = new COMSTAT();
int dwErrorFlags = 0;
ClearCommError(hComm, ref dwErrorFlags, ref ComStat);
if (dwErrorFlags != 0)
{
PurgeComm(hComm, PURGE_RXCLEAR | PURGE_RXABORT);
}
if (ComStat.cbInQue > 0)
{
OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesRead = 0;
return(ReadFile(hComm, commRead, NumBytes, ref BytesRead, ref ovlCommPort));
}
else
{
return(false);
}
}
public long ByteToRead()
{
if (hComm != INVALID_HANDLE_VALUE)
{
COMSTAT lSTAT = new COMSTAT();
uint lerror = 0;
bool f = ClearCommError((IntPtr)hComm, ref lerror, ref lSTAT);
return(lSTAT.cbInQue);
}
else
{
return(-1);
}
}
public void threadRead()
{
uint uBytesRead = 0;
byte [] byData = new byte[100];
System.Text.ASCIIEncoding asciiEncoder = new System.Text.ASCIIEncoding();
try
{
PurgeComm(m_hCOMPort, PURGE_RXCLEAR);
while (!m_bClose) //close thread
{
if (ReadFile(m_hCOMPort, byData, 20, ref uBytesRead, IntPtr.Zero))
{
if (uBytesRead > 0 && m_bClose == false)
{
string sData = asciiEncoder.GetString(byData, 0, (int)uBytesRead);
m_GpsTracker.COMCallback(m_iIndex, sData);
try
{
if (m_GpsTracker.m_MessageMonitor != null)
{
m_GpsTracker.m_MessageMonitor.AddMessageCOMRaw(sData);
}
}
catch (Exception)
{
m_GpsTracker.m_MessageMonitor = null;
}
}
}
else
{
Thread.Sleep(50);
if (GetLastError() == ERROR_OPERATION_ABORTED)
{
uint uxErrors = 0;
COMSTAT xstat = new COMSTAT();
ClearCommError(m_hCOMPort, ref uxErrors, ref xstat);
PurgeComm(m_hCOMPort, PURGE_RXCLEAR);
}
}
} //while
}
catch (Exception)
{
}
}
// 往并口写数据
public bool WritePort(byte[] WriteBytes)
{
if (hComm == INVALID_HANDLE_VALUE) //如果并口未打开
{
return(false);
}
COMSTAT ComStat = new COMSTAT();
int dwErrorFlags = 0;
ClearCommError(hComm, ref dwErrorFlags, ref ComStat);
if (dwErrorFlags != 0)
{
PurgeComm(hComm, PURGE_TXCLEAR | PURGE_TXABORT);
}
OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesWritten = 0;
// SET THE COMM TIMEOUTS.
COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS();
GetCommTimeouts(hComm, ref ctoCommPort);
ctoCommPort.ReadIntervalTimeout = Int32.MaxValue;
ctoCommPort.ReadTotalTimeoutConstant = 0;
ctoCommPort.ReadTotalTimeoutMultiplier = 0;
ctoCommPort.WriteTotalTimeoutMultiplier = 10;
ctoCommPort.WriteTotalTimeoutConstant = 3000;
if (!SetCommTimeouts(hComm, ref ctoCommPort))
{
return(false);
}
WriteFile(hComm, WriteBytes, WriteBytes.Length, ref BytesWritten, ref ovlCommPort);
if (BytesWritten > 0)
{
return(true);
}
else
{
return(false);
}
}
// 往串口写数据
public bool WritePort(byte[] WriteBytes)
{
if (hComm == INVALID_HANDLE_VALUE)
{
return(false);
}
COMSTAT ComStat = new COMSTAT();
int dwErrorFlags = 0;
ClearCommError(hComm, ref dwErrorFlags, ref ComStat);
if (dwErrorFlags != 0)
{
PurgeComm(hComm, PURGE_TXCLEAR | PURGE_TXABORT);
}
OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesWritten = 0;
return(WriteFile(hComm, WriteBytes, WriteBytes.Length, ref BytesWritten, ref ovlCommPort));
}
public int Read(ref byte[] commRead, int NumBytes)
{
if (hComm != INVALID_HANDLE_VALUE)
{
COMSTAT ComStat = new COMSTAT();
uint dwErrorFlags = 0;
ClearCommError(hComm, ref dwErrorFlags, ref ComStat);
if (ComStat.cbInQue > 0 && NumBytes > 0)
{
int count = Math.Min(NumBytes, (int)(ComStat.cbInQue));
OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesRead = 0;
if (!GetCommState(hComm, ref DCBlock))
{
Logger.Error("GetCommState Error!");
}
//Logger.Info("Com[{0}] Info: {1}, {2}, {3}, {4}", PortName, DCBlock.BaudRate, DCBlock.ByteSize, DCBlock.Parity, DCBlock.StopBits);
bool ret = ReadFile(hComm, commRead, count, ref BytesRead, ref ovlCommPort);
if (ret)
{
return(BytesRead);
}
else
{
return(0);
}
}
else
{
return(0);
}
}
else
{
return(-1);
}
}
public static extern bool ClearCommError(IntPtr hFile, out uint lpErrors, out COMSTAT cs);
internal static extern bool ClearCommError(IntPtr hFile, out uint lpErrors, out COMSTAT cs);
private static extern bool ClearCommError(
int hFile, // handle to file
ref int lpErrors,
ref COMSTAT lpStat
);
internal static extern bool ClearCommError( IntPtr hFile, ref int lpErrors, ref COMSTAT lpStat );
internal static extern Boolean ClearCommError(IntPtr hFile, out UInt32 lpErrors, out COMSTAT cs);
public static extern Boolean ClearCommError([In()] CreateFileWHandle hFile, ref IntPtr lpErrors, ref COMSTAT lpStat);
private static extern bool ClearCommError(uint hFile, ref uint lpErrors,ref COMSTAT lpStat);
public static extern bool ClearCommError(IntPtr handle, out uint errors, ref COMSTAT ver);
public static extern Boolean ClearCommError(IntPtr hFile, out UInt32 lpErrors, out COMSTAT cs);
public bool Open()
{
bool fRet = false;
DCB dcbCommPort = new DCB();
COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS();
//ensure comport is closed
Close();
// Open select Gps COM port
m_hCOMPort = CreateFile("\\\\.\\COM" + m_iCOMPort.ToString().Trim(), GENERIC_READ, 0, 0, OPEN_EXISTING, 0, 0);
if (m_hCOMPort != INVALID_HANDLE_VALUE)
{
uint uxErrors = 0;
COMSTAT xstat = new COMSTAT();
ClearCommError(m_hCOMPort, ref uxErrors, ref xstat);
PurgeComm(m_hCOMPort, PURGE_RXCLEAR);
// SET THE COMM TIMEOUTS.
GetCommTimeouts(m_hCOMPort, ref ctoCommPort);
ctoCommPort.ReadIntervalTimeout = 0; //200ms read timeout
ctoCommPort.ReadTotalTimeoutConstant = 100;
ctoCommPort.ReadTotalTimeoutMultiplier = 0;
SetCommTimeouts(m_hCOMPort, ref ctoCommPort);
// SET BAUD RATE, PARITY, WORD SIZE, AND STOP BITS.
dcbCommPort.DCBlength = (uint)Marshal.SizeOf(dcbCommPort);
GetCommState(m_hCOMPort, ref dcbCommPort);
dcbCommPort.DCBlength = (uint)Marshal.SizeOf(dcbCommPort);
dcbCommPort.BaudRate = m_iBaudRate;
dcbCommPort.Parity = m_byParity;
dcbCommPort.ByteSize = m_byByteSize;
dcbCommPort.StopBits = m_byStopBits;
dcbCommPort.flags = 1;
switch (m_iFlowControl)
{
case 0: //None
dcbCommPort.flags = 0x1091; //use 1091 for no abort on error 50
break;
case 1: //Hardware
dcbCommPort.flags = 0x2095; //use 2095 for no abort on error 60
break;
case 2: //Sw
dcbCommPort.flags = 0x1391; //use 1391 for no abort on error 53
break;
}
dcbCommPort.XonLim = 0x50;
dcbCommPort.XoffLim = 0xC8;
dcbCommPort.XonChar = Convert.ToChar(0x11);
dcbCommPort.XoffChar = Convert.ToChar(0x13);
dcbCommPort.wReserved = 0;
dcbCommPort.wReserved1 = 0;
dcbCommPort.ErrorChar = Convert.ToChar(0);
dcbCommPort.EvtChar = Convert.ToChar(0);
dcbCommPort.EofChar = Convert.ToChar(0);
if (SetCommState(m_hCOMPort, ref dcbCommPort))
{
fRet = true;
}
}
IsOpen = fRet;
m_bClose = !fRet;
return(fRet);
}
private static extern bool ClearCommError(uint hFile, ref uint lpErrors, ref COMSTAT lpStat);
internal static extern bool ClearCommError(
IntPtr hFile,
ref uint lpErrors,
ref COMSTAT lpStat);
public void threadRead()
{
uint uBytesRead=0;
byte [] byData = new byte[100];
System.Text.ASCIIEncoding asciiEncoder = new System.Text.ASCIIEncoding();
try
{
PurgeComm(m_hCOMPort,PURGE_RXCLEAR);
while (!m_bClose) //close thread
{
if (ReadFile(m_hCOMPort,byData,20,ref uBytesRead,IntPtr.Zero))
{
if (uBytesRead>0 && m_bClose==false)
{
string sData = asciiEncoder.GetString(byData,0,(int)uBytesRead);
m_GpsTracker.COMCallback(m_iIndex,sData);
try
{
if(m_GpsTracker.m_MessageMonitor!=null)
m_GpsTracker.m_MessageMonitor.AddMessageCOMRaw(sData);
}
catch (Exception)
{
m_GpsTracker.m_MessageMonitor=null;
}
}
}
else
{
Thread.Sleep(50);
if (GetLastError()==ERROR_OPERATION_ABORTED)
{
uint uxErrors=0;
COMSTAT xstat = new COMSTAT();
ClearCommError (m_hCOMPort,ref uxErrors, ref xstat);
PurgeComm(m_hCOMPort,PURGE_RXCLEAR);
}
}
} //while
}
catch(Exception)
{
}
}
public bool Open()
{
bool fRet=false;
DCB dcbCommPort = new DCB();
COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS();
//ensure comport is closed
Close();
// Open select Gps COM port
m_hCOMPort = CreateFile("\\\\.\\COM" + m_iCOMPort.ToString().Trim() ,GENERIC_READ,0, 0,OPEN_EXISTING,0,0);
if(m_hCOMPort != INVALID_HANDLE_VALUE)
{
uint uxErrors=0;
COMSTAT xstat = new COMSTAT();
ClearCommError (m_hCOMPort,ref uxErrors, ref xstat);
PurgeComm(m_hCOMPort,PURGE_RXCLEAR);
// SET THE COMM TIMEOUTS.
GetCommTimeouts(m_hCOMPort,ref ctoCommPort);
ctoCommPort.ReadIntervalTimeout=0; //200ms read timeout
ctoCommPort.ReadTotalTimeoutConstant = 100;
ctoCommPort.ReadTotalTimeoutMultiplier = 0;
SetCommTimeouts(m_hCOMPort,ref ctoCommPort);
// SET BAUD RATE, PARITY, WORD SIZE, AND STOP BITS.
dcbCommPort.DCBlength=(uint)Marshal.SizeOf(dcbCommPort);
GetCommState(m_hCOMPort, ref dcbCommPort);
dcbCommPort.DCBlength=(uint)Marshal.SizeOf(dcbCommPort);
dcbCommPort.BaudRate=m_iBaudRate;
dcbCommPort.Parity=m_byParity;
dcbCommPort.ByteSize=m_byByteSize;
dcbCommPort.StopBits=m_byStopBits;
dcbCommPort.flags=1;
switch (m_iFlowControl)
{
case 0: //None
dcbCommPort.flags=0x1091; //use 1091 for no abort on error 50
break;
case 1: //Hardware
dcbCommPort.flags=0x2095; //use 2095 for no abort on error 60
break;
case 2: //Sw
dcbCommPort.flags=0x1391; //use 1391 for no abort on error 53
break;
}
dcbCommPort.XonLim=0x50;
dcbCommPort.XoffLim=0xC8;
dcbCommPort.XonChar=Convert.ToChar(0x11);
dcbCommPort.XoffChar=Convert.ToChar(0x13);
dcbCommPort.wReserved=0;
dcbCommPort.wReserved1=0;
dcbCommPort.ErrorChar=Convert.ToChar(0);
dcbCommPort.EvtChar=Convert.ToChar(0);
dcbCommPort.EofChar=Convert.ToChar(0);
if (SetCommState(m_hCOMPort, ref dcbCommPort))
fRet=true;
}
IsOpen=fRet;
m_bClose=!fRet;
return fRet;
}
public static extern bool ClearCommError(IntPtr handle, out uint errors, ref COMSTAT ver);
internal static partial bool ClearCommError(
SafeFileHandle hFile,
ref int lpErrors,
ref COMSTAT lpStat);
internal static extern bool ClearCommError(
SafeFileHandle hFile, // handle to comm device
ref int lpErrors,
ref COMSTAT lpStat
);
// 장치의 오류 Flag를 지우거나 송수신된 데이타의 갯수를 확인한다.
// lpErrors :
// [1]CE_RXOVER: 수신버퍼 Overflow 발생
// [2]CE_OVERRUN: 수신버퍼 Overrun 에러발생
// [4]CE_RXPARITY: 수신 데이타 패리티비트 에러발생
// [8]CE_FRAME: 수신 Framing 에러발생
// lpStat->cbInQue : 수신버퍼에 입력된 데이타 갯수
// lpStat->cbOutQue: 송신버퍼에 남은 데이타 갯수
[DllImport("kernel32.dll")] public static extern uint AxsPortClearCommError(int nPortNo, out uint lpErrors, ref COMSTAT lpStat);
internal static extern bool ClearCommError(
SafeFileHandle hFile, // handle to comm device
ref int lpErrors,
ref COMSTAT lpStat
);
public static extern bool ClearCommError(int hFile, ref int lpErrors, ref COMSTAT lpStat);
