基于C#的串口通信上位機(jī)和下位機(jī)源程序

1、 基于單片機(jī)串口通信的上位機(jī)和下位機(jī)實(shí)踐串口是計(jì)算機(jī)上一種非常通用設(shè)備通信的協(xié)議（不要與通用串行總線Universal Serial Bus或者USB混淆）。大多數(shù)計(jì)算機(jī)包含兩個(gè)基于RS232的串口。串口同時(shí)也是儀器儀表設(shè)備通用的通信協(xié)議；很多GPIB兼容的設(shè)備也帶有RS-232口。同時(shí)，串口通信協(xié)議也可以用于獲取遠(yuǎn)程采集設(shè)備的數(shù)據(jù)。 串口通信的概念非常簡(jiǎn)單，串口按位（bit）發(fā)送和接收字節(jié)。盡管比按字節(jié)（byte）的并行通信慢，但是串口可以在使用一根線發(fā)送數(shù)據(jù)的同時(shí)用另一根線接收數(shù)據(jù)。它很簡(jiǎn)單并且能夠?qū)崿F(xiàn)遠(yuǎn)距離通信。比如IEEE488定義并行通行狀態(tài)時(shí)，規(guī)定設(shè)備線總常不得超過20米，并且任意

2、兩個(gè)設(shè)備間的長度不得超過2米；而對(duì)于串口而言，長度可達(dá)1200米。首先亮出C#的源程序吧。主要界面：只是作為簡(jiǎn)單的運(yùn)用，可以擴(kuò)展的。源代碼：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 單片機(jī)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;/串口號(hào) String str2 = comboBox2.Text;/波特率 String str3 = comboBox3.Text;/校驗(yàn)位 String str4 = comboBox5.Text;/停止位 String str5 = c

4、omboBox4.Text;/數(shù)據(jù)位 Int32 int2 = Convert.ToInt32(str2);/將字符串轉(zhuǎn)為整型 Int32 int5 = Convert.ToInt32(str5);/將字符串轉(zhuǎn)為整型 groupBox3.Enabled = true;/LED控制界面變可選 try if (button1.Text = "打開串口") if (str1 = null) MessageBox.Show("請(qǐng)先選擇串口！", "Error"); return; sp.Close(); sp = new SerialPort

5、(); sp.PortName = comboBox1.Text;/串口編號(hào) 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：參數(shù)不正確&

6、quot;, "Error"); break; switch (str3) case "NONE": sp.Parity = Parity.None; break; case "ODD": sp.Parity = Parity.Odd; break; case "EVEN": sp.Parity = Parity.Even; break; default: MessageBox.Show("Error：參數(shù)不正確", "Error"); break; sp.DataBits

7、= int5;/數(shù)據(jù)位 sp.Parity = Parity.Even;/設(shè)置串口屬性 sp.Open();/打開串口 button1.Text = "關(guān)閉串口" textBox1.Text = Convert.ToString(sp.PortName) + "已開啟！" else sp.Close(); button1.Text = "打開串口" groupBox3.Enabled = false;/LED控制界面變灰色 textBox1.Text = Convert.ToString(sp.PortName) + "已關(guān)

8、閉！" catch (Exception er) MessageBox.Show("Error:" + er.Message, "Error"); return; private void Form1_Load(object sender, EventArgs e) /初始化 textBox1.Text = "歡迎使用簡(jiǎn)易的串口助手！" groupBox3.Enabled = false;/LED控制界面變灰色 groupBox6.Enabled = false; groupBox7.Enabled = false; gro

9、upBox8.Enabled = false; button3.Enabled = false; button6.Enabled = false; timer1.Start(); try foreach (string com in System.IO.Ports.SerialPort.GetPortNames() /自動(dòng)獲取串行口名稱 boBox1.Items.Add(com); /默認(rèn)設(shè)置 comboBox1.SelectedIndex = 0;/選擇第一個(gè)com口 comboBox2.SelectedIndex = 4;/波特率4800 comboBox3.SelectedIndex =

10、 0;/校驗(yàn)位NONE comboBox4.SelectedIndex = 0;/停止位為1 comboBox5.SelectedIndex = 0;/數(shù)據(jù)位為8 catch MessageBox.Show("找不到通訊端口！", "串口調(diào)試助手"); private void timer1_Tick(object sender, EventArgs e) label6.Text = DateTime.Now.ToString(); private void button2_Click(object sender, EventArgs e) try if

11、 (button2.Text = "開啟") groupBox6.Enabled = true; radioButton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Checked = false; checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = false; checkBox4.Checked = false; checkBox5.Che

12、cked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = false; button3.Enabled = true; textBox2.Text = String.Empty; button2.Text = "關(guān)閉" else groupBox6.Enabled = false; button3.Enabled = false; button2.Text = "開啟" textBox2.Text = String.Empty; catc

13、h (Exception er) MessageBox.Show("Error:" + er.Message, "Error"); return; private void button3_Click(object sender, EventArgs e) groupBox6.Enabled = true; label7.Text = "已發(fā)送" if (textBox2.Text = "") MessageBox.Show("發(fā)送失敗，請(qǐng)選擇發(fā)送的數(shù)據(jù)！"); else sp.WriteLin

14、e(textBox2.Text);/往串口寫數(shù)據(jù) private void checkBox1_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 = f

15、alse; checkBox8.Checked = false; label7.Text = "準(zhǔn)備發(fā)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.Check

16、ed = false; checkBox2.Checked = true; checkBox3.Checked = false; checkBox4.Checked = false; checkBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = false; label7.Text = "準(zhǔn)備發(fā)送" textBox2.Text = "2" radioButton1.Checked = false; radioButt

17、on2.Checked = false; radioButton3.Checked = false; radioButton4.Checked = false; catch (Exception er) MessageBox.Show("Error:" + er.Message, "Error"); return; private void checkBox3_CheckedChanged(object sender, EventArgs e) try if (checkBox3.Checked) checkBox1.Checked = false; c

18、heckBox2.Checked = false; checkBox3.Checked = true; checkBox4.Checked = false; checkBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = false; radioButton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Checked =

19、false; label7.Text = "準(zhǔn)備發(fā)送" textBox2.Text = "3" catch (Exception er) MessageBox.Show("Error:" + er.Message, "Error"); return; private void checkBox4_CheckedChanged(object sender, EventArgs e) try if (checkBox4.Checked) checkBox1.Checked = false; checkBox2.Chec

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

21、.Text = "準(zhǔn)備發(fā)送" textBox2.Text = "4" catch (Exception er) MessageBox.Show("Error:" + er.Message, "Error"); return; private void checkBox5_CheckedChanged(object sender, EventArgs e) try if (checkBox5.Checked) checkBox1.Checked = false; checkBox2.Checked = false;

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

23、;準(zhǔn)備發(fā)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.Checked = false; checkBox3.Che

24、cked = 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.Text = "準(zhǔn)備發(fā)送" t

25、extBox2.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;

26、 checkBox4.Checked = 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 = "準(zhǔn)備發(fā)送" textBox2.Text

27、= "7" catch (Exception er) MessageBox.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.Ch

28、ecked = false; checkBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = true; radioButton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Checked = false; label7.Text = "準(zhǔn)備發(fā)送" textBox2.Text = "8&quo

29、t; catch (Exception er) MessageBox.Show("Error:" + er.Message, "Error"); return; private void button5_Click(object sender, EventArgs e) try if (button5.Text = "開啟") radioButton1.Checked = false; radioButton2.Checked = false; radioButton3.Checked = false; radioButton4.Ch

30、ecked = false; checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = false; checkBox4.Checked = false; checkBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = false; groupBox7.Enabled = true; button6.Enabled = true; textBox2.Text = Str

31、ing.Empty; button5.Text = "關(guān)閉" else groupBox7.Enabled = false; button6.Enabled = false; button5.Text = "開啟" textBox2.Text = String.Empty; catch (Exception er) MessageBox.Show("Error:" + er.Message, "Error"); return; private void button6_Click(object sender, Ev

32、entArgs e) label7.Text = "已發(fā)送" if (textBox2.Text = "") MessageBox.Show("發(fā)送失敗。請(qǐng)選擇發(fā)送的數(shù)據(jù)！"); else sp.WriteLine(textBox2.Text);/往串口寫數(shù)據(jù) private void radioButton1_CheckedChanged(object sender, EventArgs e) try if (radioButton1.Checked) label7.Text = "準(zhǔn)備發(fā)送" textBox2.

33、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 = false; catch (Exception er) MessageBox.Show("Error:" + er.Me

34、ssage, "Error"); return; private void radioButton2_CheckedChanged(object sender, EventArgs e) try if (radioButton2.Checked) label7.Text = "準(zhǔn)備發(fā)送" textBox2.Text = "a" checkBox1.Checked = false; checkBox2.Checked = false; checkBox3.Checked = false; checkBox4.Checked = false; checkBox5.Checked = false; checkBox6.Checked = false; checkBox7.Checked = false; checkBox8.Checked = false; catch (Ex