protected void WriteComm(byte[] buf)
{
new Thread(() =>
{
NativeOverlapped ov = new System.Threading.NativeOverlapped();
if (!GWin32.WriteFileEx(m_hCommPort, buf, (uint)buf.Length, ref ov, (uint err, uint b, ref NativeOverlapped c) =>
{
if (err != 0)
{
Console.WriteLine("Write come done " + err);
}
Console.WriteLine("Write come done tran=" + b);
}))
{
Console.WriteLine("failed write comm " + getWinErr());
}
// IOCompletion routine is only called once this thread is in an alertable wait state.
gwait();
}).Start();
}
public void Close()
{
GWin32.CloseHandle(m_hCommPort);
m_hCommPort = IntPtr.Zero;
}
public void Open()
{
if (m_hCommPort != IntPtr.Zero)
{
return;
}
SerialPort comm = new SerialPort();
comm.BaudRate = 128000;
m_hCommPort = GWin32.CreateFile("COM3",
FileAccess.Read | FileAccess.Write, //GENERIC_READ | GENERIC_WRITE,//access ( read and write)
FileShare.None, //0, //(share) 0:cannot share the COM port
IntPtr.Zero, //0, //security (None)
FileMode.Open, //OPEN_EXISTING,// creation : open_existing
0x20000000 | 0x40000000, //FILE_FLAG_OVERLAPPED,// we want overlapped operation
IntPtr.Zero //0// no templates file for COM port...
);
if (m_hCommPort == IntPtr.Zero)
{
int err = Marshal.GetLastWin32Error();
string errorMessage = new Win32Exception(Marshal.GetLastWin32Error()).Message;
throwWinErr("Open com failed ");
}
const uint EV_RXCHAR = 1, EV_TXEMPTY = 4;
if (!GWin32.SetCommMask(m_hCommPort, EV_RXCHAR | EV_TXEMPTY))
{
throwWinErr("Failed to Set Comm Mask");
}
GWin32.DCB dcb = new GWin32.DCB();
dcb.DCBLength = (uint)Marshal.SizeOf(dcb);
if (!GWin32.GetCommState(m_hCommPort, ref dcb))
{
throwWinErr("CSerialCommHelper : Failed to Get Comm State");
}
dcb.BaudRate = (uint)comm.BaudRate;
dcb.ByteSize = (byte)comm.DataBits;
dcb.Parity = comm.Parity;
dcb.StopBits = comm.StopBits;
dcb.DsrSensitivity = false;
dcb.DtrControl = GWin32.DtrControl.Enable;
dcb.OutxDsrFlow = false;
dcb.OutxCtsFlow = false;
dcb.InX = false;
dcb.RtsControl = GWin32.RtsControl.Disable;
dcb.Binary = true;
if (!GWin32.SetCommState(m_hCommPort, ref dcb))
{
throwWinErr("CSerialCommHelper : Failed to Set Comm State");
}
GWin32.COMMTIMEOUTS commTimeouts = new GWin32.COMMTIMEOUTS();
commTimeouts.ReadIntervalTimeout = 0; // Never timeout, always wait for data.
commTimeouts.ReadTotalTimeoutMultiplier = 0; // Do not allow big read timeout when big read buffer used
commTimeouts.ReadTotalTimeoutConstant = 0; // Total read timeout (period of read loop)
commTimeouts.WriteTotalTimeoutConstant = 0; // Const part of write timeout
commTimeouts.WriteTotalTimeoutMultiplier = 0; // Variable part of write timeout (per byte)
GWin32.SetCommTimeouts(m_hCommPort, ref commTimeouts);
}
protected void gwait()
{
GWin32.SleepEx(GWin32.INFINITE, true);
}
public void Start(IX4Tran tran)
{
GWin32.PurgeComm(m_hCommPort, 0x0004 | 0x0008);
WriteComm(new byte[] { 0xA5, 0x60 });
if (_thread != null)
{
return;
}
threadStarted = true;
_thread = new Thread(() =>
{
NativeOverlapped ov = new System.Threading.NativeOverlapped();
try
{
while (threadStarted)
{
var buf1 = new byte[1];
SetTimeout(0); //set always wait
GWin32.SetLastError(0);
GWin32.ReadFileEx(m_hCommPort, buf1, (uint)buf1.Length, ref ov, (uint err, uint len, ref NativeOverlapped ov1) =>
{
if (err != 0)
{
Console.WriteLine("read got err " + err);
}
else
{
SetTimeout();
uint numRead;
ov.EventHandle = GWin32.CreateEvent(IntPtr.Zero, true, false, null);
var tbuf = new byte[2048];
if (!GWin32.ReadFile(m_hCommPort, tbuf, (uint)tbuf.Length, out numRead, ref ov))
{
if (GWin32.GetLastError() == 997) //IO Pending
{
GWin32.WaitForSingleObject(ov.EventHandle, GWin32.INFINITE);
}
else
{
Console.WriteLine("read got err " + getWinErr());
}
GWin32.GetOverlappedResult(m_hCommPort, ref ov, out numRead, true);
}
GWin32.CloseHandle(ov.EventHandle);
ov.EventHandle = IntPtr.Zero;
//Console.WriteLine("got data " + numRead);
var buf = new byte[1 + numRead];
buf[0] = buf1[0];
if (numRead > 0)
{
Array.Copy(tbuf, 0, buf, 1, numRead);
tran.Translate(buf);
}
//Console.WriteLine(BitConverter.ToString(buf));
}
});
var le = GWin32.GetLastError();
if (le != 0)
{
_thread = null;
Console.WriteLine("Read Error " + le);
break;
}
gwait();
}
} catch (InvalidOperationException iv)
{
_thread = null;
threadStarted = false;
Console.WriteLine("InvalidOperationException " + iv.Message);
}
Console.WriteLine("thread done");
});
_thread.Start();
}
protected void SetTimeout(uint tm = GWin32.INFINITE)
{
GWin32.COMMTIMEOUTS commTimeouts = new GWin32.COMMTIMEOUTS();
commTimeouts.ReadIntervalTimeout = tm;
GWin32.SetCommTimeouts(m_hCommPort, ref commTimeouts);
}
