The host computer develops C# language: simulates the STC serial port assistant to receive the data sent by the microcontroller

题目概述：
design a simulationSTC串口助手,Receive or send data through the serial port.
STC串口助手：

编程：
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 SerialCommunicate
{

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;
    }

    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 Form1_Load(object sender, EventArgs e)
    {
        textBox3.Text = DateTime.Now.ToString("h:mm:ss");
        timer1.Enabled = true;
        timer1.Interval = 1000;
        for (int i = 1; i < 20; i++)
        {
            comboBox1.Items.Add("COM" + i.ToString());
        }
        comboBox1.Text = "COM4";//串口号多额默认值
        comboBox2.Text = "9600";//波特率默认值
        
        /*****************非常重要************************/
        
        serialPort1.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);//必须手动添加事件处理程序

    }

    private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)//串口数据接收事件
    {
        if (!radioButton3.Checked)//如果接收模式为字符模式
        {
            string str = serialPort1.ReadExisting();//字符串方式读
            textBox1.AppendText(str);//添加内容
        }
        else { //如果接收模式为数值接收
            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,不必考虑是否会丢失数据
            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”   
        }
    }
    
    private void button2_Click(object sender, EventArgs e)
    {
        try
        {
            serialPort1.Close();//关闭串口
            button1.Enabled = true;//打开串口按钮可用
            button2.Enabled = false;//关闭串口按钮不可用
        }
        catch //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];//存储一个字节 Send the next byte after the update
        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);//写数据
                    }
                    catch (Exception err)
                    {
                        MessageBox.Show("串口数据写入错误", "错误");//出错提示
                        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（如果输入字符为0A0BB,则只发送0A,0B）
                    }
                    if (textBox2.Text.Length % 2 != 0)//剩下一位单独处理
                    {
                        Data[0] = Convert.ToByte(textBox2.Text.Substring(textBox2.Text.Length-1, 1), 16);//单独发送B（0B）
                        serialPort1.Write(Data, 0, 1);//发送
                    }
               }
            }
        }
    }
    
    private void timer1_Tick(object sender, EventArgs e)
    {
        textBox3.Text = DateTime.Now.ToString("h:mm:ss");
    }
}

}

上机实践：