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我有一个程序设置，其中 MCU 通过 USART 将传感器数据发送到 C# windows 窗体应用程序。该应用程序在通过 serialdatareceived 事件接收数据后，使用匿名管道将其发送到托管 c++ 应用程序。一旦收到数据，它就会在 OpenGL 3d 环境中绘制。

我的问题是 3D 应用程序每秒只刷新几次，而且动画很慢而且不够流畅。我尽了最大努力提高 USART 速度，但结果是一样的。我相信动画速度受到匿名管道速度的限制。我想知道是否有其他人以前遇到过这个问题，并且可能找到了加快匿名管道数据传输的方法。

所以我的问题是两个应用程序之间的低数据传输速度。理想情况下，我希望每秒 20 多条消息，但至少数据传输的瓶颈应该是 USART 接口而不是匿名管道。我正在运行 19200 的波特率，并且正在传输命令“get_angle”并以相当快的速度接收数据（在 MCU 上计算数据约为 20 毫秒），接收到的数据约为 12 个字符。

我在托管 C++ 中的匿名管道客户端（在 WinMain 中）：

try
{
    String^ args = gcnew String(lpCmdLine);

    PipeStream^ pipeClient = gcnew AnonymousPipeClientStream(PipeDirection::In, args);
    StreamReader^ sr = gcnew StreamReader(pipeClient);

    String^ temp;

    fullscreen = FALSE;


    if (!CreateGLWindow("OpenGL Test", 640, 480, 16, fullscreen))
    {
        return 0;                                   // Quit If Window Was Not Created
    }

    while (!done)                                   // Loop That Runs While done=FALSE
    {
        if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))   // Is There A Message Waiting?
        {
            if (msg.message == WM_QUIT)             // Was the message a quit message?
            {
                done = TRUE;                            // Set Flag to execute program
            }
            else                                    // If Not, Deal With Window Messages
            {
                TranslateMessage(&msg);             // Translate The Message
                DispatchMessage(&msg);              // Dispatch The Message
            }
        }

        temp = sr->ReadLine();                      //  Read text from pipeline

        if (temp != "")                             // Make sure message is not empty/New message has been received
        {
            try
            {
                x_an = FLOAT::Parse(temp->Substring(0, 5));             // Parse X value from string to float
                y_an = FLOAT::Parse(temp->Substring(7, 12));            // Parse Y value from string to float
            }
            catch (Exception^)
            {
                MessageBox(NULL, "Error parsing string to float", "Fatal error", MB_OK);
            }
        }

        if ((!done)&& (1))
        {

            // Draw The Scene.  Watch For ESC Key And Quit Messages From DrawGLScene()
            if ((active && !DrawGLScene()) || keys[VK_ESCAPE])  // Active?  Was There A Quit Received?
            {
                done = TRUE;                            // ESC or DrawGLScene Signalled A Quit
            }
            else                                    // Not Time To Quit, Update Screen
            {
                SwapBuffers(hDC);                   // Swap Buffers (Double Buffering)
            }

        }
    }
    // Shutdown
    sr->Close();
    pipeClient->Close();

    KillGLWindow();                                 // Kill The Window
    return (msg.wParam);                            // Exit The Program
}
catch (Exception^)
{
    MessageBox(NULL, "Pipe connection error", "Fatal error", MB_OK);
    return 0x01;
}

我的 C# 匿名管道服务器部分的代码：

private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
    {
        if (Ready_To_Receive)
        {
            if (Setup_Pipe)
            {
                try
                {
                pipeClient.StartInfo.FileName = "client.exe";
                pipeClient.StartInfo.Arguments =
                pipeServer.GetClientHandleAsString();
                pipeClient.StartInfo.UseShellExecute = false;
                pipeClient.Start();

                pipeServer.DisposeLocalCopyOfClientHandle();

                sw = new System.IO.StreamWriter(pipeServer);

                sw.AutoFlush = true;

                Setup_Pipe = false;
                }
                catch
                {
                    MessageBox.Show("Error setting up pipeserver.");
                    button2_Click(this, null); // Resets application
                }
            }
            Debug_String = serialPort1.ReadExisting();
            Debug_String = Debug_String.Replace(serialPort1.NewLine, "");                           // Delete newline character so all that remains are numbers

            if (!(Debug_String == ""))                        // String is not empty
            {
                DataReceived = true;
                try
                {
                    sw.WriteLine(Debug_String);
                }
                catch (Exception)
                {
                    MessageBox.Show("Connection to Pipe Client lost.");
                    button2_Click(this, null);
                }

            }
        }
        else if (Shutting_Down)
        {
            pipeClient.Close();
        }
        else
        {
        serialPort1.ReadExisting(); // Flush the data buffer
            DataReceived = true;
        }
    }
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