串行端口在Visual C＃2010中不起作用 [英] Serial Port not working in Visual C# 2010

问题描述

我正在努力让我的串口工作。 第一部分工作得很好。 它找到所有可用的通信端口，我可以正确选择端口。 但是当我尝试向其发送字符时，接收事件不会发生。 这是我的代码
。 我做错了什么？ 现在我只想显示收到消息框的内容，但理想情况下我想解析数据。

I am trying to get my Serial port to work.  The first part is working great.  It finds all available comm ports and I can correctly select the port.  But when I try to send characters to it, the receive event does not happen.  here is my code.  what am I doing wrong?  Right now I just want to display what is being received into a Message Box, but ideally I want to parse through the data.

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        string RxString;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            foreach (string ports in System.IO.Ports.SerialPort.GetPortNames())
            {
                COMPortsBox.Items.Add(ports);
            }
            COMPortsBox.Sorted = true;

        }

        private void COMPortsBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (serialPort1.IsOpen)
            {
                serialPort1.RtsEnable = false;
                serialPort1.DtrEnable = false;
                serialPort1.Close();
                System.Threading.Thread.Sleep(250);
                
            }
            serialPort1.PortName = COMPortsBox.Text;
            serialPort1.BaudRate = 115200;              // Default for 115200 bit/s, 8 data bits, no parity, 1 stop bit
            serialPort1.WriteTimeout = 2000;            // Max time to wait for CTS = 2 sec.
            serialPort1.DataBits = 8;
            serialPort1.Parity = Parity.None;
            serialPort1.StopBits = StopBits.One;
            

            serialPort1.Open();
        }

        private void DisplayText(object sender, EventArgs e)
        {
            MessageBox.Show(RxString);
        }

        private void serialPort1_DataReceived
          (object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            RxString = serialPort1.ReadExisting();
            this.Invoke(new EventHandler(DisplayText));
        }

    }
}

推荐答案

你好engirerwolf，

Hello engirerwolf,

我想让我的串口工作。 第一部分工作得很好。 它找到所有可用的通信端口，我可以正确选择端口。 但是当我尝试向其发送字符时，接收事件不会发生。 这是我的代码
。 我做错了什么？ 现在我只想显示收到消息框的内容，但理想情况下我想解析数据。

I am trying to get my Serial port to work.  The first part is working great.  It finds all available comm ports and I can correctly select the port.  But when I try to send characters to it, the receive event does not happen.  here is my code.  what am I doing wrong?  Right now I just want to display what is being received into a Message Box, but ideally I want to parse through the data.

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        string RxString;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            foreach (string ports in System.IO.Ports.SerialPort.GetPortNames())
            {
                COMPortsBox.Items.Add(ports);
            }
            COMPortsBox.Sorted = true;

        }

        private void COMPortsBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (serialPort1.IsOpen)
            {
                serialPort1.RtsEnable = false;
                serialPort1.DtrEnable = false;
                serialPort1.Close();
                System.Threading.Thread.Sleep(250);
                
            }
            serialPort1.PortName = COMPortsBox.Text;
            serialPort1.BaudRate = 115200;              // Default for 115200 bit/s, 8 data bits, no parity, 1 stop bit
            serialPort1.WriteTimeout = 2000;            // Max time to wait for CTS = 2 sec.
            serialPort1.DataBits = 8;
            serialPort1.Parity = Parity.None;
            serialPort1.StopBits = StopBits.One;
            

            serialPort1.Open();
        }

        private void DisplayText(object sender, EventArgs e)
        {
            MessageBox.Show(RxString);
        }

        private void serialPort1_DataReceived
          (object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            RxString = serialPort1.ReadExisting();
            this.Invoke(new EventHandler(DisplayText));
        }

    }
}

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