基于单片机串口通信的上位机和下位机实践串口Universal Serial Bus或者USBRS232GPIB兼容的设备也带有RS-232获取远程采集设备的数据。

bitbyte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IEEE4882021200米。

首先亮出C#的源程序吧。

using System;using System.Collections.Generic;using ponentModel;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 partial 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 = comboBox4.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("", "Error");return;}sp.Close();sp = new SerialPort();sp.PortName = comboBox1.Text;//串口编号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确", "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) + "";}else{sp.Close();button1.Text = "打开串口";groupBox3.Enabled = false;//LED控制界面变灰色textBox1.Text = Convert.ToString(sp.PortName) + "";}}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";groupBox3.Enabled = false;//LED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;//选择第一个com口comboBox2.SelectedIndex = 4;//波特率4800comboBox3.SelectedIndex = 0;//校验位NONEcomboBox4.SelectedIndex = 0;//停止位为1comboBox5.SelectedIndex = 0;//数据位为8}catch{MessageBox.Show("", "串口调试助手");}}private void timer1_Tick(object sender, EventArgs e){label6.Text = DateTime.Now.ToString();}private void button2_Click(object sender, EventArgs e){try {if (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;checkBox4.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 = String.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("");elsesp.WriteLine(textBox2.Text);//往串口写数据}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 = false;checkBox8.Checked = false;label7.Text = "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;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.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; checkBox7.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 checkBox4_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;radioButton1.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 (checkBox5.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;radioButton3.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.Checked = 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.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 = 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){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.Checked = 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 = "准备发送";textBox2.Text = "8";}}catch (Exception er){MessageBox.Show("Error:" + er.Message, "Error");return;} }private void 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; checkBox5.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 = String.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。