基于C#的串口通信上位机和下位机源程序[优选材料]

1、 基于单片机串口通信的上位机和下位机实践串口是计算机上一种非常通用设备通信的协议（不要与通用串行总线Universal Serial Bus或者USB混淆）。大多数计算机包含两个基于RS232的串口。串口同时也是仪器仪表设备通用的通信协议；很多GPIB兼容的设备也带有RS-232口。同时，串口通信协议也可以用于获取远程采集设备的数据。 串口通信的概念非常简单，串口按位（bit）发送和接收字节。尽管比按字节（byte）的并行通信慢，但是串口可以在使用一根线发送数据的同时用另一根线接收数据。它很简单并且能够实现远距离通信。比如IEEE488定义并行通行状态时，规定设备线总常不得超过20米，并且任意

2、两个设备间的长度不得超过2米；而对于串口而言，长度可达1200米。首先亮出C#的源程序吧。主要界面：只是作为简单的运用，可以扩展的。源代码：using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.IO.Ports;using System.Timers;namespace 单片机功能控制 public parti

3、al class Form1 : Form public Form1() InitializeComponent(); SerialPort sp = new SerialPort(); private void button1_Click(object sender, EventArgs e) String str1 = comboBox1.Text;/串口号 String str2 = comboBox2.Text;/波特率 String str3 = comboBox3.Text;/校验位 String str4 = comboBox5.Text;/停止位 String str5 = c

4、omboBox4.Text;/数据位 Int32 int2 = Convert.ToInt32(str2);/将字符串转为整型 Int32 int5 = Convert.ToInt32(str5);/将字符串转为整型 groupBox3.Enabled = true;/LED控制界面变可选 try if (button1.Text = 打开串口) if (str1 = null) MessageBox.Show(请先选择串口！, Error); return; sp.Close(); sp = new SerialPort(); sp.PortName = comboBox1.Text;/串口

5、编号 sp.BaudRate = int2;/波特率 switch (str4)/停止位 case 1: sp.StopBits = StopBits.One; break; case 1.5: sp.StopBits = StopBits.OnePointFive; break; case 2: sp.StopBits = StopBits.Two; break; default: MessageBox.Show(Error：参数不正确, Error); break; switch (str3) case NONE: sp.Parity = Parity.None; break; case

6、ODD: sp.Parity = Parity.Odd; break; case EVEN: sp.Parity = Parity.Even; break; default: MessageBox.Show(Error：参数不正确, Error); break; sp.DataBits = int5;/数据位 sp.Parity = Parity.Even;/设置串口属性 sp.Open();/打开串口 button1.Text = 关闭串口; textBox1.Text = Convert.ToString(sp.PortName) + 已开启！; else sp.Close(); butt

7、on1.Text = 打开串口; groupBox3.Enabled = false;/LED控制界面变灰色 textBox1.Text = Convert.ToString(sp.PortName) + 已关闭！; catch (Exception er) MessageBox.Show(Error: + er.Message, Error); return; private void Form1_Load(object sender, EventArgs e) /初始化 textBox1.Text = 欢迎使用简易的串口助手！; groupBox3.Enabled = false;/LED

8、控制界面变灰色 groupBox6.Enabled = false; groupBox7.Enabled = false; groupBox8.Enabled = false; button3.Enabled = false; button6.Enabled = false; timer1.Start(); try foreach (string com in System.IO.Ports.SerialPort.GetPortNames() /自动获取串行口名称 boBox1.Items.Add(com); /默认设置 comboBox1.SelectedIndex = 0;

9、/选择第一个com口 comboBox2.SelectedIndex = 4;/波特率4800 comboBox3.SelectedIndex = 0;/校验位NONE comboBox4.SelectedIndex = 0;/停止位为1 comboBox5.SelectedIndex = 0;/数据位为8 catch MessageBox.Show(找不到通讯端口！, 串口调试助手); private void timer1_Tick(object sender, EventArgs e) label6.Text = DateTime.Now.ToString(); private void

10、 button2_Click(object sender, EventArgs e) try if (button2.Text = 开启) groupBox6.Enabled = true; radioButton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Checked = false; checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = false; che

11、ckBox4.Checked = false; checkBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = false; button3.Enabled = true; textBox2.Text = String.Empty; button2.Text = 关闭; else groupBox6.Enabled = false; button3.Enabled = false; button2.Text = 开启; textBox2.Text = Str

12、ing.Empty; catch (Exception er) MessageBox.Show(Error: + er.Message, Error); return; private void button3_Click(object sender, EventArgs e) groupBox6.Enabled = true; label7.Text = 已发送; if (textBox2.Text = ) MessageBox.Show(发送失败，请选择发送的数据！); else sp.WriteLine(textBox2.Text);/往串口写数据 private void checkB

13、ox1_CheckedChanged(object sender, EventArgs e) try if (checkBox1.Checked) checkBox1.Checked = true; checkBox2.Checked = false; checkBox3.Checked = false; checkBox4.Checked = false; checkBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = false; label7.Text

14、 = 准备发送; textBox2.Text = 1; catch (Exception er) MessageBox.Show(Error: + er.Message, Error); return; private void checkBox2_CheckedChanged(object sender, EventArgs e) try if (checkBox2.Checked) checkBox1.Checked = false; checkBox2.Checked = true; checkBox3.Checked = false; checkBox4.Checked = false

15、; checkBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = false; label7.Text = 准备发送; textBox2.Text = 2; radioButton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Checked = false; catch (Exception er) MessageBox

16、.Show(Error: + er.Message, Error); return; private void checkBox3_CheckedChanged(object sender, EventArgs e) try if (checkBox3.Checked) checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = true; checkBox4.Checked = false; checkBox5.Checked = false; checkBox6.Checked = false; che

17、ckBox7.Checked = false; checkBox8.Checked = false; radioButton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Checked = false; label7.Text = 准备发送; textBox2.Text = 3; catch (Exception er) MessageBox.Show(Error: + er.Message, Error); return; private void che

18、ckBox4_CheckedChanged(object sender, EventArgs e) try if (checkBox4.Checked) checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = false; checkBox4.Checked = true; checkBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = false; radioBut

19、ton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Checked = false; label7.Text = 准备发送; textBox2.Text = 4; catch (Exception er) MessageBox.Show(Error: + er.Message, Error); return; private void checkBox5_CheckedChanged(object sender, EventArgs e) try if (c

20、heckBox5.Checked) checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = false; checkBox4.Checked = false; checkBox5.Checked = true; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = false; radioButton1.Checked = false; radioButton2.Checked = false; radioBu

21、tton3.Checked = false; radioButton4.Checked = false; label7.Text = 准备发送; textBox2.Text = 5; catch (Exception er) MessageBox.Show(Error: + er.Message, Error); return; private void checkBox6_CheckedChanged(object sender, EventArgs e) try if (checkBox6.Checked) checkBox1.Checked = false; checkBox2.Chec

22、ked = false; checkBox3.Checked = false; checkBox4.Checked = false; checkBox5.Checked = false; checkBox6.Checked = true; checkBox7.Checked = false; checkBox8.Checked = false; radioButton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Checked = false; label7

23、.Text = 准备发送; textBox2.Text = 6; catch (Exception er) MessageBox.Show(Error: + er.Message, Error); return; private void checkBox7_CheckedChanged(object sender, EventArgs e) try if (checkBox7.Checked) checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = false; checkBox4.Checked =

24、 false; checkBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = true; checkBox8.Checked = false; radioButton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Checked = false; label7.Text = 准备发送; textBox2.Text = 7; catch (Exception er) Messa

25、geBox.Show(Error: + er.Message, Error); return; private void checkBox8_CheckedChanged(object sender, EventArgs e) try if (checkBox8.Checked) checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = false; checkBox4.Checked = false; checkBox5.Checked = false; checkBox6.Checked = fals

26、e; checkBox7.Checked = false; checkBox8.Checked = true; radioButton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Checked = false; label7.Text = 准备发送; textBox2.Text = 8; catch (Exception er) MessageBox.Show(Error: + er.Message, Error); return; private voi

27、d button5_Click(object sender, EventArgs e) try if (button5.Text = 开启) radioButton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Checked = false; checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = false; checkBox4.Checked = false; c

28、heckBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = false; groupBox7.Enabled = true; button6.Enabled = true; textBox2.Text = String.Empty; button5.Text = 关闭; else groupBox7.Enabled = false; button6.Enabled = false; button5.Text = 开启; textBox2.Text = St

29、ring.Empty; catch (Exception er) MessageBox.Show(Error: + er.Message, Error); return; private void button6_Click(object sender, EventArgs e) label7.Text = 已发送; if (textBox2.Text = ) MessageBox.Show(发送失败。请选择发送的数据！); else sp.WriteLine(textBox2.Text);/往串口写数据 private void radioButton1_CheckedChanged(obj

30、ect sender, EventArgs e) try if (radioButton1.Checked) label7.Text = 准备发送; textBox2.Text = 9; checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = false; checkBox4.Checked = false; checkBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked

31、 = false; catch (Exception er) MessageBox.Show(Error: + er.Message, Error); return; private void radioButton2_CheckedChanged(object sender, EventArgs e) try if (radioButton2.Checked) label7.Text = 准备发送; textBox2.Text = a; checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = false; checkBox4.Checked = false; checkBox5.Checked = false; checkBox6.Checked = false; ch