• 大小: 76KB
    文件类型: .rar
    金币: 2
    下载: 1 次
    发布日期: 2021-06-11
  • 语言: 其他
  • 标签: 串口MODBUS  

资源简介

最近工作中需要实现远程抄表功能,电表通讯协义为modbus,通过RS485与上位机(电脑)通讯。 网上搜索了好多资料,发现大部分的示例写出来的modbus协议都是错误的,特别是最后面的两位检验码,于是把这个可用的分享给大家。

资源截图

代码片段和文件信息

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;
using System.Text.Regularexpressions;

namespace SerialportSample
{
    public partial class SerialportSampleForm : Form
    {
        private SerialPort comm = new SerialPort();
        private ModbusCRC crc = new ModbusCRC();

        private StringBuilder builder = new StringBuilder();//避免在事件处理方法中反复的创建,定义到外面。
        private long received_count = 0;//接收计数
        private long send_count = 0;//发送计数

        public SerialportSampleForm()
        {
            InitializeComponent();
        }

        //窗体初始化
        private void Form1_Load(object sender EventArgs e)
        {
            //初始化下拉串口名称列表框
            string[] ports = SerialPort.GetPortNames();
            Array.Sort(ports);
            comboPortName.Items.AddRange(ports);
            comboPortName.SelectedIndex = comboPortName.Items.Count > 0 ? 0 : -1;
            comboBaudrate.SelectedIndex = comboBaudrate.Items.IndexOf(“4800“);

            //初始化SerialPort对象
            comm.NewLine = “\r\n“;
            comm.RtsEnable = true;//根据实际情况吧。
            buttonSend.Enabled = false;

            //添加事件注册
            comm.DataReceived += comm_DataReceived;
        }

        void comm_DataReceived(object sender SerialDataReceivedEventArgs e)
        {
            int n = comm.BytesToRead;//先记录下来,避免某种原因,人为的原因,操作几次之间时间长,缓存不一致
            byte[] buf = new byte[n];//声明一个临时数组存储当前来的串口数据
            received_count += n;//增加接收计数
            comm.Read(buf 0 n);//读取缓冲数据
            builder.Clear();//清除字符串构造器的内容
            //因为要访问ui资源,所以需要使用invoke方式同步ui。
            this.Invoke((EventHandler)(delegate
            {
                //判断是否是显示为16禁止
                if (checkBoxHexView.Checked)
                {
                    //依次的拼接出16进制字符串
                    foreach (byte b in buf)
                    {
                        builder.Append(b.ToString(“X2“) + “ “);
                    }
                }
                else
                {
                    //直接按ASCII规则转换成字符串
                    builder.Append(Encoding.ASCII.GetString(buf));
                }
                //追加的形式添加到文本框末端,并滚动到最后。
                this.txGet.AppendText(builder.ToString());
                //修改接收计数
                labelGetCount.Text = “Get:“ + received_count.ToString();
            }));
        }

        private void buttonOpenClose_Click(object sender EventArgs e)
        {
            //根据当前串口对象,来判断操作
            if (comm.IsOpen)
            {
                //打开时点击,则关闭串口
                comm.Close();
                buttonSend.Enabled = false;
            }
            else
            {
                //关闭时点击,则设置好端口,波特率后打开
                comm.PortName = comboPortName.Text;
                comm.BaudRat

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件      17920  2015-01-23 10:30  SerialportSample\SerialportSample\bin\Debug\SerialportSample.exe

     文件      44544  2015-01-23 10:30  SerialportSample\SerialportSample\bin\Debug\SerialportSample.pdb

     文件      22984  2015-01-23 10:30  SerialportSample\SerialportSample\bin\Debug\SerialportSample.vshost.exe

     文件        490  2010-03-18 12:39  SerialportSample\SerialportSample\bin\Debug\SerialportSample.vshost.exe.manifest

     文件       6247  2014-11-28 14:15  SerialportSample\SerialportSample\Form1.cs

     文件      16892  2014-11-27 14:48  SerialportSample\SerialportSample\Form1.Designer.cs

     文件       5817  2014-11-27 14:48  SerialportSample\SerialportSample\Form1.resx

     文件       4797  2014-11-28 14:16  SerialportSample\SerialportSample\ModbusCRC.cs

     文件       5420  2014-11-26 14:06  SerialportSample\SerialportSample\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

     文件       7056  2015-01-23 10:30  SerialportSample\SerialportSample\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件        312  2014-04-02 12:49  SerialportSample\SerialportSample\obj\x86\Debug\GenerateResource.read.1.tlog

     文件        788  2014-04-02 12:49  SerialportSample\SerialportSample\obj\x86\Debug\GenerateResource.write.1.tlog

     文件       7897  2014-04-08 13:54  SerialportSample\SerialportSample\obj\x86\Debug\ResolveAssemblyReference.cache

     文件       3419  2015-01-23 10:30  SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.csproj.FileListAbsolute.txt

     文件        975  2014-11-28 14:16  SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.csproj.GenerateResource.Cache

     文件       9174  2015-01-23 10:30  SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.csprojResolveAssemblyReference.cache

     文件      17920  2015-01-23 10:30  SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.exe

     文件      44544  2015-01-23 10:30  SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.pdb

     文件        180  2015-01-23 10:30  SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.Properties.Resources.resources

     文件        180  2015-01-23 10:30  SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.SerialportSampleForm.resources

     文件        523  2010-05-16 03:24  SerialportSample\SerialportSample\Program.cs

     文件       1468  2010-05-16 02:19  SerialportSample\SerialportSample\Properties\AssemblyInfo.cs

     文件       2858  2010-05-16 02:19  SerialportSample\SerialportSample\Properties\Resources.Designer.cs

     文件       5612  2010-05-16 02:19  SerialportSample\SerialportSample\Properties\Resources.resx

     文件       1099  2010-05-16 02:19  SerialportSample\SerialportSample\Properties\Settings.Designer.cs

     文件        249  2010-05-16 02:19  SerialportSample\SerialportSample\Properties\Settings.settings

     文件       3773  2014-11-28 17:41  SerialportSample\SerialportSample\SerialportSample.csproj

     文件       1240  2014-11-28 17:41  SerialportSample\SerialportSample\uSerialPort.cs

     文件        890  2010-05-16 02:19  SerialportSample\SerialportSample.sln

    ..A..H.     21504  2014-04-08 13:56  SerialportSample\SerialportSample.suo

............此处省略14个文件信息

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