Csharp实现串口自动收发指定数据

1、串口 COM3正常情况下依次发送过来“G1 G2 G3”内容，串口助手判断接收的数据内容，然后发送特定长度的随机内容给串口，当串口接收到的非“ G1G2G3 ”内容，提示system root 错误整个软件功能包含如下：搜索电脑上的串口，并打开指定的串口设置串口的波特率设置发送和接受的模式，是数值还是字符打开或者关闭端口，打开端口后，发送和接收模式、端口和波特率不能更改发送，当文本内容为空的时候，“发送”按钮显示灰色，不能使用当接收到G1的时候，记数一次，并在lobel上显示当接收异常的是时候，记数一次，并在lobel上显示主要代码如下：using System;using System.Co

2、llections.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 SerialCommunicatepublic partial class Form1 : Formint count = 0; /记数G1收到的次数int root = 0;/ 记数 收到错误的次数public Form1()Initia

3、lizeComponent();System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;private void button1_Click(object sender, EventArgs e)tryserialPort1.PortName = comboBox1.Text;serialPortl.BaudRate = Convert.ToInt32(comboBox2.Text,10); /十进制数据转 换serialPort1.Open();button1.Enabled = false ;/打开串 口按钮

4、不可用butt on2.Enabled = t rue;/关闭串口 comboBox1.Enabled = false; comboBox2.Enabled = false; panel1.Enabled = false; panel2.Enabled = false;catch MessageBox.Show(端口错误，请检查串口 ，”错误)；private void Form1_Load (object sender， EventArgs e)this.timer1.Start();this. timer1.Interval = 1000; /定时间隔 100msst ring str =

5、 Sys te m.IO.Por ts.SerialPor t.Ge tPor tNames();/获取串口数组 comboBox1.Items.AddRange(str);string bote = new string 9600， 115200， 2400 ; /comboBox1.Text = COM 1 ; /串口号多额默认值 comboBox1.Text = str0;comboBox2.Items.AddRange(bote);comboBox2.Text = bot e0;/波特率默认值/btnOK.Enabled = txMsg.Text.Trim() != String.Em

6、pty;/button3.Enabled = textBox2.Text.Trim() != string.Empty;textBox2.Text = ;if (textBox2.Text.Length != 0) /判断文本2是否为空，为空不能发送 button3.Enabled = true; else button3.Enabled = false;label4.Text = count.ToString() + 次发送 G1; label5.Text = root.ToString() + 次出现 system root;/Tj 匚 ril-l-l-l/*非常重要*/serialPor

7、t1.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived) ; /必须手动添加事件处理程序private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)/ 串口数据接收事件if (!radioButton3. Checked) /如果接收模式为字符模式 string str = serialPort1. ReadExisting () ; /字符串方式读 t ex tBox1.AppendTex t(s tr); /添加

8、内容else /如果接收模式为数值接收byte data;da ta = (by te)serialPor t1.ReadBy te();/此处需要强制类型转换，将(int)类型 数据转换为(byte类型数据，不必考虑是否会丢失数据string str = Convert.ToString(data, 16). ToUpper() /转换为大写十六进制字 符串textBox1.AppendText(0 x + (str.Length = 1 ?0 + str : str) + );/ 空位补“0”/上一句等同为：if(str.Length = 1)/str = 0 + str;/else/st

9、r = str;/textBox1.AppendText(0 x + str);private void radioButton2_CheckedChanged(object sender, EventArgs e) private void button2_Click(object sender, EventArgs e)tryserialPor t1.Close();/关闭串口butt onl.Enabled = t rue;/打开串口按钮可用button2.Enabled = false ;/关闭串 口按钮不可用 comboBox1.Enabled = true;comboBox2.En

10、abled = true;panel1.Enabled = true;panel2.Enabled = true;catch (Excep tion err) /一般情况下关闭串口不会出错，所以不需要加处理程序 private void button3_Click(object sender, EventArgs e)byt e Da ta = new byt e1;/作用同上集if (serialPor t1.Is0pen)/判断串口是否打开，如果打开执行下一步操作 if (textBox2.Text != )/button3.Enabled = true;if (!radioBu tt o

11、n1.Checked)/如果发送模式是字符模式try /textBox2.Text = !000 100 0000 000.0 +50.0 00.0 00.0 00.0;serialPort1.WriteLine(textBox2.Text); /写数据catch (Exception err)MessageBox.Show(串口数据写入错误，”错误)；/出错提示 serialPort1.Close();butto n1.Enabled = t rue;/打开串口按钮可用 button2.Enabled = false ;/关闭串 口按钮不可用else for(inti =0; i (text

12、Box2.Text.Length - textBox2. Text. Length %2) / 2; i+)/取余3运算作用是防止用户输入的字符为奇数个Data0 = Convert.ToByte(textBox2.Text.Substring(i * 2， 2)， 16);serialPortl.Write(Data, 0, 1);/循环发送(如果输入字符为 0A0BB, 则只发送0A,0B)if (textBox2.Text.Length % 2 != 0) /剩下一位单独处理Data0 =Convert.ToByte(textBox2.Text.Substring(textBox2.Te

13、xt.LengthT, 1), 16);/单独发送 B (OB) serialPort1.Write(Data, 0, 1);/发送private void textBox2_TextChanged (object sender, EventArgs e)if (textBox2.Text.Length != 0) /判断文本2是否为空，为空不能发送button3.Enabled = true;elsebutton3.Enabled = false;private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)pr

14、ivate void comboBox1_SelectedIndexChanged(object sender, EventArgs e) private void button4_Click(object sender, EventArgs e) private void button4_Click_1(object sender, EventArgs e) textBox1.Text = ;/清除按钮按下 清空private void textBox1_TextChanged(object sender, EventArgs e) private void timer1_Tick(obje

15、ct sender, EventArgs e)this.timer1.Stop();/ 首先关闭定时器，因有可能后面执行的代码时间大于设置的定 时间隔时间if (textBox1.Text = 0 x47 0 x33 0 x0D )Random r2 = new Random();/产生随机数int z = r2.Next(999);textBox2.Text = !225.9/255.8/255.6 255.9/255.8/226.6 219.1/001.0/001.0001.7/001.0/001.0n;/textBox2.Text = !+z.ToString()+/+ z.ToStri

16、ng() + /+ z.ToString() + / + +/ 255.9 / 255.8 / 226.6 219.1 / 001.0 / 001.0 001.7 / 001.0 / 001.0n ;/serialPor tl.Wri teLine( text Box2.Tex t);/写数据 button4_Click(sender, e);textBox1.Text = null; /textBox2.Text = null;else if (textBox1.Text = 0 x47 0 x32 0 x0D )/G2Random r1 = new Random();/产生随机数int v

17、 = r1.Next(1);textBox2.Text = !0000 + v.ToString() + 011 00000111 00000000n;/textBox2.Text = !00000011 00000111 00000000n;/serialPor tl.Wri teLine( text Box2.Tex t);/写数据 button4_Click(sender, e);textBox1.Text = null; /textBox2.Text = null;else if (textBox1.Text = 0 x47 0 x31 0 x0D ) /G1Random r1 = n

18、ew Random();/产生随机数int v = r1.Next(99);/随机数范围 099Random r2 = new Random();/产生随机数 int z = r2.Next(9999);/随机数范围 09999/textBox2.Text = !000 100 0000 000.0 + v.ToString()+.0 00.0 00.0 00.0n;textBox2.Text =!000 + v.ToString() + + z.ToString() + 000.0 + + + v.ToString() + .0 00.0 00.0 00.0n;serialPor tl.Wri teLine( tex tBox2.Tex t); /写数据 bu tt on4_Click(sender, e);/ 引用 butt on 事件 textBox1.Text = null;/textBox2.Text = null;label4.Text = count.ToString() + 次发送 G1 ;/label 上显示发送的次数 count+;else if(textBox1.Text !=)label5.Text = root.ToString() + 次出现 syst