public void Close()
{
GWin32.CloseHandle(m_hCommPort);
m_hCommPort = IntPtr.Zero;
}
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();
}