C#串口调试助手代码

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO.Ports; namespace 串口调试助手 { public partial class Form1 : Form { public Form1() { InitializeComponent(); System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false; } private void Form1_Load(object sender, EventArgs e) { for (int i = 0; i < 10; i++) { comboBox1.Items.Add("COM" + i.ToString()); } comboBox1.Text = "COM1";//串口号默认值 comboBox2.Text = "4800";//波特率默认值 /***************非常重要*****************/ serialPort1.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived); } private void port_DataReceived(object sender, SerialDataReceivedEventArgs e) { if (!radioButton3.Checked)//如果接受模式为字符模式 { string str = serialPort1.ReadExisting();//字符串方式读 textBox1.AppendText(str);//添加内容 } else//如果接受模式为数值模式 { byte data; data = (byte)serialPort1.ReadByte();//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("0x" + (str.Length == 1 ? "0" + str : str) + " ");//空位补"0" // 上一句等同于 // if (str.Length == 1) // { // str = "0" + str; // } // else // { // str = str; // } // textBox1.AppendText("0x" + str); } } private void button1_Click(object sender, EventArgs e) { try { serialPort1.PortName = comboBox1.Text; serialPort1.BaudRate = Convert.ToInt32(comboBox2.Text,10);//十进制数据转换 serialPort1.Open(); button1.Enabled = false;//打开串口按钮不可用 button2.Enabled = true;//关闭串口 } catch { MessageBox.Show("端口错误，请检查串口！", "错误"); } } private void button2_Click(object sender, EventArgs e) { try { serialPort1.Close(); button1.Enabled = true;//打开串口按钮可用 button2.Enabled = false;//关闭串口按钮不可用 } catch(Exception 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) { byte[] Data = new byte[1]; if (serialPort1.IsOpen)//判断串口是否打开，如果打开执行下一步操作 { if (textBox2.Text != "") { if(!radioButton1.Checked)//如果发送模式是字符模式 { try { serialPort1.WriteLine(textBox2.Text); } catch (Exception err) { MessageBox.Show("串口数据写入错误", "错误"); serialPort1.Close(); button1.Enabled = true;//打开串口按钮可用 button2.Enabled = false;//关闭串口按钮不可用 } } else { for (int i = 0 ; i < (textBox2.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 { Data[0] = Convert.ToByte(textBox2.Text.Substring(i * 2, 2), 16); serialPort1.Write(Data, 0, 1);//循环发送（如果输入字符位0A0BB，则只发送0A,0B） } if(textBox2.Text.Length % 2 != 0) { //等同于下句 //Data[0] = Convert.ToByte(textBox2.Text.Substring(textBox2.Text.Length - textBox2.Text.Length % 2, textBox2.Text.Length % 2),16); Data[0] = Convert.ToByte(textBox2.Text.Substring(textBox2.Text.Length - 1, 1), 16);//单独发送B(0B) serialPort1.Write(Data,0,1); } } } } } } }