在 C# 中检测 Arduino 端口 [英] Detect Arduino port in C#

问题描述

我试图打开每个端口并串行发送 ，我的微控制器将响应 \n 之后 C# 代码必须退出 for 每个循环.

I'm trying to open each port and send <mccon> serially, for which my microcontroller will respond <connected>\n after which the C# code must exit the for each loop.

我在 serialPort.PortName = str; 行遇到问题.两次迭代后，不再继续.

I'm having a problem at the serialPort.PortName = str; line. After two iterations, it does not continue further.

我也尝试过手动执行此操作.我做了一个下拉菜单，一一选择了端口.在第二个端口之后，不允许更改串口.但如果我在两次尝试内选择，它就可以正常工作.

I tried doing this manually too. I made a drop down and selected ports one by one. After the second port, it does not allow to change the serial Port. But in case I select within two tries, it works fine.

我知道 C++ 中的 OOP.但我是 C# 的新手.我不确定为什么循环失败.

I know OOP in C++. But I'm new to C#. I'm not sure why the loop fails.

public Form1()
{
    InitializeComponent();
    send_button.Enabled = false;

    //Availabe COM ports
    SerialPort tmp;
    foreach(string str in SerialPort.GetPortNames())
    {
        tmp = new SerialPort(str);
        if (tmp.IsOpen == false)
        {
            serialPort.PortName = str;

            try
            {
                //Open serial port
                serialPort.Open();
                serialPort.BaudRate = 9600;
                serialPort.WriteTimeout = 10;
                serialPort.ReadTimeout = 10;
                serialPort.Write("<mccon>");
                readtxt.Text = serialPort.ReadTo("\n");
                if (readtxt.Text == "<connected>")
                {
                    send_button.Enabled = true;
                    port_combobox.Enabled = false;
                    break;
                }
                else
                {
                    serialPort.Close();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }
}

推荐答案

我没有多个串口，但是当我编译和执行你的代码时，我注意到如果在执行过程中出错，你并没有关闭串口读.我建议你修改你的代码如下:

I don't have multiple serial ports, but when I compiled and executed your code, I noticed that you are not closing the serial port if it errors during the read. I suggest you modify your code as follows:

        SerialPort tmp;
        foreach (string str in SerialPort.GetPortNames())
        {
            tmp = new SerialPort(str);
            if (tmp.IsOpen == false)
            {

                serialPort.PortName = str;

                try
                {
                    //open serial port
                    serialPort.Open();
                    serialPort.BaudRate = 9600;
                    serialPort.WriteTimeout = 10;
                    serialPort.ReadTimeout = 10;
                    serialPort.Write("<mccon>");
                    String s = serialPort.ReadTo("\n");
                    if (s == "<connected>")
                    {
                        break;
                    }
                    else
                    {
                        serialPort.Close();
                    }
                }
                catch (TimeoutException)
                {
                    serialPort.Close();
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }

我不确定在端口打开时更改端口名称的效果，但这很可能会导致您看到的问题.

I'm not sure the effect on changing the port name while it's open, but it could well cause the issues you are seeing.

这篇关于在 C# 中检测 Arduino 端口的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！