C#.NET下设计串口终端程序+示例工程
以前一直用delphi和BCB设计和串口通信有关的软件, 不过为了与时俱进,今天在网上找了找资料,写了一个C#的串口小程序供大家参考学习.
GUI的图片:
功能的设定是非常简单的,为了大家修改成自己需要的模式,我删除了大部分不常用的功能留下了最最基础的代码.
通过选择串口，设定波特率，启动，发送字符，HEX格式切换等基本功能实现了串口通信的功能。
一下是基本代码，因为所有的代码我都简化和加了注释，所以相信是非常容易理解的。
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;namespace MyUSART{ public partial class MainForm : Form { bool USARTstate = true;// 串口状态 true 为可以启动 false 为可以关闭 int RxNum = 0; int TxNum = 0; public MainForm() { InitializeComponent(); } private void MainForm_Load(object sender, EventArgs e) { timer1.Enabled = false; timer1.Interval = 50; try { foreach (string com in System.IO.Ports.SerialPort.GetPortNames()) this.comboBox1PortName.Items.Add(com); comboBox1PortName.SelectedIndex = 0; comboBox2BaudRate.SelectedIndex = 0; } catch (System.Exception ex) { MessageBox.Show("找不到通讯串口！", "串口提示"); } } private void button1USARTstart_Click(object sender, EventArgs e) { if(USARTstate)//默认启动 { button1USARTstart.Text = "停止"; serialPort1.PortName = comboBox1PortName.Text; serialPort1.BaudRate = Convert.ToInt32(comboBox2BaudRate.Text); try { serialPort1.Open(); USARTstate = false;//可以关闭 comboBox1PortName.Enabled = false; comboBox2BaudRate.Enabled = false; timer1.Enabled = true; } catch (System.Exception ex) { MessageBox.Show("打开串口失败！\r\n:"+ex.Message); } } else { button1USARTstart.Text = "启动"; try { serialPort1.Close(); USARTstate = true;//可以启动 comboBox1PortName.Enabled = true; comboBox2BaudRate.Enabled = true; timer1.Enabled = false; } catch (System.Exception ex) { MessageBox.Show("关闭串口失败！\r\n:"+ex.Message); } } } //public static string ByteArrayToHexString(byte[] data)//字节数组转为十六进制字符串 //{ // StringBuilder sb = new StringBuilder(data.Length * 3); // foreach (byte b in data) // sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' ')); // return sb.ToString().ToUpper(); //} public static string ByteArrayToString(byte[] data)//字节数组转为十六进制字符串 { StringBuilder sb = new StringBuilder(data.Length * 3); foreach (byte b in data) sb.Append(Convert.ToChar(b)); //return sb.ToString().ToUpper(); return sb.ToString(); } public static byte[] HexStrToHexByte(string hexStr) { hexStr = hexStr.Replace(" ", "");//去掉字符串中所有的空格 if (hexStr.Length % 2 != 0) hexStr += " "; byte[] returnBytes = new byte[hexStr.Length / 2];//新建一个byte数组，存放16进制byte for (int i = 0; i < returnBytes.Length; i++) { returnBytes[i] = Convert.ToByte(hexStr.Substring(i * 2, 2).Trim(), 16); } return returnBytes; } private void button2SendData_Click(object sender, EventArgs e)//发送数据 { if (serialPort1.IsOpen) { if (checkBox.Checked)//send hex { //byte[] data = Encoding.ASCII.GetBytes(textBox1Tx.Text); byte[] data = HexStrToHexByte(textBox1Tx.Text); //string str = ByteArrayToHexString(data); serialPort1.Write(data, 0, data.Length); //serialPort1.Write(str); TxNum += data.Length; } else { string str = textBox1Tx.Text.Trim();// 获得 serialPort1.Write(str); TxNum += str.Length; } labelTxNum.Text = "TX:" + TxNum.ToString(); } else return; } private void timer1_Tick(object sender, EventArgs e)//定时器读取接受的数据，你想要的处理都可放在这里。 { if (serialPort1.IsOpen == false) return; int receiveNumber = serialPort1.BytesToRead; if (receiveNumber == 0) return; string str = null; byte[] bs = new byte[receiveNumber]; serialPort1.Read(bs, 0, receiveNumber); if (checkBox.Checked) { foreach (byte b in bs) str += b.ToString("x2") + " "; } else { str = ByteArrayToString(bs); } textBox2Rx.AppendText(str); RxNum += receiveNumber; labelRxNum.Text = "RX:" + RxNum.ToString(); } private void buttonClear_Click(object sender, EventArgs e)// 清除接收的textbox中的字符 { textBox2Rx.Clear(); TxNum = 0; RxNum = 0; labelTxNum.Text = "TX:" + TxNum.ToString(); labelRxNum.Text = "RX:" + RxNum.ToString(); } }}