public override void Open()
{
NativeStream = NativeDevice.Open();
Task.Run(() =>
{
while (IsOpen)
{
try
{
int temp = NativeStream.ReadByte();
if (temp != -1)
{
ReceivedData.Enqueue((byte)temp);
DataReceived?.Invoke(this, new System.EventArgs());
}
}
catch
{
}
}
});
}
private int ReadOneChar(int timeout)
{
int beginReadPos = readPos;
int nextByte;
int timeUsed = 0;
Debug.Assert(isOpen, "ReadOneChar - port not open");
if (timeout < 0 && timeout != SerialPort.InfiniteTimeout)
{
return(-1);
}
if (encoding.GetCharCount(inBuffer, readPos, readLen - readPos) != 0)
{
do
{
nextByte = (int)inBuffer[readPos++];
} while (encoding.GetCharCount(inBuffer, beginReadPos, readPos - beginReadPos) < 1);
encoding.GetChars(inBuffer, beginReadPos, readPos - beginReadPos, oneChar, 0);
return(oneChar[0]);
}
else
{
if (timeout == 0)
{
if (InBufferBytes + readPos >= inBuffer.Length)
{
ResizeBuffer();
}
int bytesRead = internalSerialStream.Read(inBuffer, readLen, InBufferBytes - (readLen - readPos)); // read all immediately avail.
readLen += bytesRead;
if (ReadBufferIntoChars(oneChar, 0, 1) == 0)
{
return(-1);
}
else
{
return(oneChar[0]);
}
}
int startTicks = Win32API_Serial.GetTickCount();
do
{
timeUsed = Win32API_Serial.GetTickCount() - startTicks;
if (timeout != SerialPort.InfiniteTimeout && (timeout - timeUsed <= 0))
{
nextByte = -1;
break;
}
nextByte = internalSerialStream.ReadByte((timeout == InfiniteTimeout) ? InfiniteTimeout : timeout - timeUsed);
if (nextByte == -1)
{
break;
}
if (readLen >= inBuffer.Length)
{
ResizeBuffer();
}
inBuffer[readLen++] = (byte)nextByte;
readPos++;
} while (encoding.GetCharCount(inBuffer, beginReadPos, readPos - beginReadPos) < 1);
}
if (nextByte == -1)
{
return(-1);
}
encoding.GetChars(inBuffer, beginReadPos, readPos - beginReadPos, oneChar, 0);
return(oneChar[0]);
}
