Csharp串口通讯

【实例简介】

C# 简单的串口通讯 亲测可用

【实例截图】

【核心代码】

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

namespace Csharp串口
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private delegate void MyDelegate(string s);

        private void SetText(string s)
        {
            TX_Rev.Text = TX_Rev.Text s;
        }

        private void groupBox2_Enter(object sender, EventArgs e)
        {

        }

        private void statusStrip1_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
        {

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                serialPort1 = new System.IO.Ports.SerialPort("COM3", 9600, System.IO.Ports.Parity.None, 8, System.IO.Ports.StopBits.One);
                serialPort1.DataReceived = new System.IO.Ports.SerialDataReceivedEventHandler(serialPort1_DataReceived);
                serialPort1.Open();
            }
            catch (Exception err)
            {
                MessageBox.Show(err.Message);
            }

        }
        public static string byteToHexStr(byte[] bytes)
        {
            string returnStr = "";
            if (bytes != null)
            {
                for (int i = 0; i < bytes.Length; i )
                {
                    returnStr = bytes[i].ToString("X2");
                }
            }
            return returnStr;
        }



        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            MyDelegate md = new MyDelegate(SetText);
            try
            {
                if (serialPort1.IsOpen == true)
                {     
                    int buffersize = 5;   //十六进制数的大小（假设为6Byte）
                    byte[] ReadBuffer = new Byte[buffersize];   //创建缓冲区
                    serialPort1.Read(ReadBuffer, 0, ReadBuffer.Length);
                    string ReadStr = byteToHexStr(ReadBuffer);                  
                    Invoke(md, ReadStr);
                }
            }
            catch (Exception err)
            {
                throw err;
            }
        }

        private void BTN_Send_Click(object sender, EventArgs e)
        {
            serialPort1.WriteLine(TX_Send.Text);
        }

        private void BTN_Clear_Click(object sender, EventArgs e)
        {
            TX_Rev.Text = "";
        }

        private void groupBox1_Enter(object sender, EventArgs e)
        {

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            float tmp1, tmp2, tmp3,tmp4;
            if (TX_Rev.Text != "")
            {
                string aaa = TX_Rev.Text;
                if (aaa.Substring(2, 2) == "03")
                {
                    tmp1 =Convert.ToInt16(aaa.Substring(5, 1));
                    tmp2 = Convert.ToInt16(aaa.Substring(6, 1));
                    tmp3 = Convert.ToInt16(aaa.Substring(6, 1));
                    tmp4 = tmp1 * 256 tmp2 * 16 tmp3;
                    textBox1.Text = Convert.ToString(tmp4);

//                    textBox1.Text = aaa.Substring(4, 1);
//                    textBox2.Text = aaa.Substring(5, 1);
//                    textBox3.Text = aaa.Substring(6, 1);
//                    textBox4.Text = aaa.Substring(7, 1);

                }
                else
                {
                    textBox1.Text = "NULL";
                }
                
            }
            else
            {
                
            }
//            TX_Rev.Text = "";

        }
        private static byte[] strToToHexByte(string hexString)
        {
            hexString = hexString.Replace(" ", "");
            if ((hexString.Length % 2) != 0)
                hexString = " ";
            byte[] returnBytes = new byte[hexString.Length / 2];
            for (int i = 0; i < returnBytes.Length; i )
                returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
            return returnBytes;
        }

   

    }
}


/*
 string src = "6f";
 List<byte> bytes = new List<byte>();
 byte a = byte.Parse(src,...);
 bytes.Add(a);
 * //如果字符串有多个16进制数，首先要分割，然后循环转换、添加
 * byte[] bytearr = bytes.ToArray();
 
 */