/// <summary> /// Callback function for sender ready event /// </summary> /// <param name="ar"></param> private static void SendCallback(IAsyncResult ar) { // Retrieve the communication object from the state object. UARTCommunicator communicator = (UARTCommunicator)ar.AsyncState; try { // Retrieve serial port SerialPort serial_port = communicator.m_serial_port; // Complete sending the data to the remote device. serial_port.BaseStream.EndWrite(ar); Interlocked.Add(ref communicator.m_downstream_bytes, communicator.m_transmit_data_length); // Signal that all bytes have been sent. communicator.m_sender_lock.Release(); // signal communication manager about the freed buffer communicator.m_communication_manager.GenerateEvent(); } catch { // stop thread because of the unexpected error communicator.m_stop_requested = true; communicator.m_thread_event.Set(); } }
/// <summary> /// Callback function for data received event /// </summary> /// <param name="ar"></param> private static void ReceiveCallback(IAsyncResult ar) { // Retrieve the communication object from the state object. UARTCommunicator communicator = (UARTCommunicator)ar.AsyncState; if (communicator == null) { return; } try { // Retrieve serial port SerialPort serial_port = communicator.m_serial_port; if (serial_port != null) { // Read data from the remote device. int bytes_read = serial_port.BaseStream.EndRead(ar); if (bytes_read > 0) { communicator.m_received_data_length = bytes_read; communicator.m_thread_event.Set(); } else { communicator.m_read_pending = false; communicator.m_thread_event.Set(); } } } catch { // stop thread because of the unexpected error communicator.m_stop_requested = true; communicator.m_thread_event.Set(); } }