Question

我正在使用串行端口应用程序发送带有Unicode控制字符的命令，但没有成功。当我在超级终端或Putty中发送相同的命令时，通信正常工作，所以我很好奇这两个程序是否写出了一个字节或Unicode字符数组甚至是一个字符串。如果我模仿他们做了什么，我可能会成功...而且我注意到我从Visual Studio中的工具箱中取出的串口属性被列为使用我在代码中编写的不同COM端口，这就是为什么我没有得到回应或我的代码覆盖了吗？在进行环回测试时，我得到了带有控制字符的正确命令的输出，所以我无法弄清楚我做错了什么。这是.NET 2.0 Framework FYI

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

namespace SimpleSerial
{
    public partial class Form1 : Form
    {
        string RxString;
        public Form1()
        {
            InitializeComponent();
        }
        private void buttonStart_Click(object sender, EventArgs e)
        {
            serialPort1.PortName = "COM3";
            serialPort1.BaudRate = 9600;
            serialPort1.Parity = Parity.None;
            serialPort1.DataBits = 8;
            serialPort1.StopBits = StopBits.One;
            serialPort1.Handshake = Handshake.None;
            serialPort1.ReadTimeout = 500; 
            serialPort1.WriteTimeout = 500;
            serialPort1.Open();
            if (serialPort1.IsOpen)
            {
                buttonStart.Enabled = false;
                buttonStop.Enabled = true;
                textBox1.ReadOnly = false;
            }
        }
        const char STX = '\u0002';
        const char ETX = '\u0003';
        readonly string pull_shelf_104 = string.Format("{0}01P00104##{1}" , STX, ETX);
        private byte[] WrapString(string pull_shelf_104)
        {
            return System.Text.Encoding.ASCII.GetBytes(pull_shelf_104);
        }
        private void linkLabel_HC1_100_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            if (serialPort1.IsOpen)
            {
                byte[] data = WrapString(pull_shelf_104);
                serialPort1.Write(data, 0, data.Length);
            }
        }
        private void buttonStop_Click(object sender, EventArgs e)
        {
            if (serialPort1.IsOpen)
            {
                serialPort1.Close();
                buttonStart.Enabled = true;
                buttonStop.Enabled = false;
                textBox1.ReadOnly = true;
            }
        }
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (serialPort1.IsOpen) serialPort1.Close();
        }
        private void DisplayText(object sender, EventArgs e)
        {
            textBox1.AppendText(RxString);
        }
        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            RxString = serialPort1.ReadExisting();
            this.Invoke(new EventHandler(DisplayText));
        }
    }
}

Answer 1

以上评论帮我解决了这个问题，谢谢你的帮助！我需要在我的代码中启用RTS和DTS，列出COM端口不是问题，虽然我确定它在某些情况下。这是我的代码，适用于任何有类似问题的人。

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

namespace SimpleSerial
{
    public partial class Form1 : Form
    {
        string RxString;
        public Form1()
        {
            InitializeComponent();
        }
        private void buttonStart_Click(object sender, EventArgs e)
        {
            serialPort1.PortName = "COM3";
            serialPort1.BaudRate = 9600;
            serialPort1.Parity = Parity.None;
            serialPort1.DataBits = 8;
            serialPort1.StopBits = StopBits.One;
            serialPort1.Handshake = Handshake.None;
            serialPort1.RtsEnable = true;
            serialPort1.DtrEnable = true;
            serialPort1.ReadTimeout = 2000; 
            serialPort1.WriteTimeout = 2000;
            serialPort1.Open();
            if (serialPort1.IsOpen)
            {
                buttonStart.Enabled = false;
                buttonStop.Enabled = true;
                textBox1.ReadOnly = false;
            }
        }
        const char STX = '\u0002';
        const char ETX = '\u0003';
        readonly string pull_shelf_104 = string.Format("{0}01P00204##{1}" , STX, ETX);
        private byte[] WrapString(string pull_shelf_104)
        {
            return System.Text.Encoding.ASCII.GetBytes(pull_shelf_104);
        }
        private void linkLabel_HC1_100_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            if (serialPort1.IsOpen)
            {
                byte[] data = WrapString(pull_shelf_104);
                serialPort1.Write(data, 0, data.Length);
            }
        }
        private void buttonStop_Click(object sender, EventArgs e)
        {
            if (serialPort1.IsOpen)
            {
                serialPort1.Close();
                buttonStart.Enabled = true;
                buttonStop.Enabled = false;
                textBox1.ReadOnly = true;
            }
        }
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (serialPort1.IsOpen) serialPort1.Close();
        }
        private void DisplayText(object sender, EventArgs e)
        {
            textBox1.AppendText(RxString);
        }
        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            RxString = serialPort1.ReadExisting();
            this.Invoke(new EventHandler(DisplayText));
        }
    }
}

SerialPorts：以字节或字符发送？

1 个答案: