public void SendReceiveWithBeginEnd()
{
using (SerialPortStream src = new SerialPortStream(SourcePort, 115200, 8, Parity.None, StopBits.One))
using (SerialPortStream dst = new SerialPortStream(DestPort, 115200, 8, Parity.None, StopBits.One)) {
src.WriteTimeout = TimeOut; src.ReadTimeout = TimeOut;
dst.WriteTimeout = TimeOut; dst.ReadTimeout = TimeOut;
src.Open(); Assert.That(src.IsOpen, Is.True);
dst.Open(); Assert.That(dst.IsOpen, Is.True);
SendReceiveAsyncState state = new SendReceiveAsyncState {
src = src,
dst = dst,
sendBuf = new byte[src.WriteBufferSize],
recvBuf = new byte[src.WriteBufferSize + 10]
};
Random r = new Random();
r.NextBytes(state.sendBuf);
// Here we start the read and write in parallel. The read will wait up to c_Timeout for the first byte.
dst.BeginRead(state.recvBuf, 0, state.recvBuf.Length, SendReceiveAsyncReadComplete, state);
src.BeginWrite(state.sendBuf, 0, state.sendBuf.Length, SendReceiveAsyncWriteComplete, state);
if (!state.finished.WaitOne(30000))
{
Assert.Fail("BeginWrite/BeginRead test case timeout");
}
}
}
public static IAsyncResult BeginRead(this SerialPortStream stream, out Message message, AsyncCallback callback, object state) => stream.BeginRead((message = new Message()).MessageBytes, 0, Message.messageSize, callback, state);
