C# 串口调试-发送接收

串口接收

private long receive_count = 0;//接收字节计数
        public static  SerialPort serialPort1 = new SerialPort();
       public static StringBuilder sb = new StringBuilder();     //为了避免在接收处理函数中反复调用，依然声明为一个全局变量
        public Form1()
        {
            InitializeComponent();
            serialPort1.DataReceived += SerialPort1_DataReceived;//在当前窗体中运行serialport串口接收事件
        }
/// 

        /// 数据接收事件
        /// 
        /// 
        /// 
        public void SerialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {

            int num = 0,tempnum=0;
            Thread.Sleep(25);//延迟接收-- 嵌入式mcu在发送时可能出现一段数据分多个包发送 需要一定的延迟
            byte[] receive_buf = new byte[tempnum];
            byte[] full=new byte[tempnum]; 
            while (serialPort1.BytesToRead>0)
            {
                 tempnum = 0;
                    tempnum = serialPort1.BytesToRead;
                 receive_buf = new byte[tempnum];
                serialPort1.Read(receive_buf, 0, tempnum);
                num += tempnum;
                receive_count += num;
                full = new byte[full.Length + receive_buf.Length];
            }
           
            //           throw new NotImplementedException();
            //int num = serialPort1.BytesToRead;//获取接收缓冲区的字节数
            //byte[] receive_buf = new byte[num];//声明一个大小为num的字节数据用于存放读出的byte型数据
            //serialPort1.Read(receive_buf, 0, num);//读取接收缓存区num的字节数
            sb.Clear();     //防止出错,首先清空字符串构造器

            if (checkBoxshowtime.Checked)
            {
              
                BeginInvoke(new Action(() =>
                {
                    textBoxreceive.AppendText("["+DateTime.Now.TimeOfDay.ToString()+"]收:");
                }));

            }
            if (radioButtonreceiveASCII.Checked)
            {
                 sb.Append(Encoding.ASCII.GetString(receive_buf));  //将整个数组解码为ASCII数组
                
           //科学计数法
           //    sb.Append(Convert.ToDecimal(Convert.ToDouble(Encoding.ASCII.GetString(receive_buf))));
               
               
            }
            else if (radioButtonreceiveHEX.Checked)
            {
                sb.Append(Conversion.byteToHex(receive_buf));
            }

            try
            {
                this.Invoke((EventHandler)(delegate
                {
                    textBoxreceive.AppendText(sb.ToString());
                    textBoxreceive.AppendText("\r\n");
                    label8.Text = "RX:" + receive_count.ToString() + "Bytes";
                }
                )
                );
            }
            catch (Exception ex)
            {
                System.Media.SystemSounds.Beep.Play();
                MessageBox.Show(ex.Message);
            }
        }
/// 

        /// 打开/关闭串口
        /// 
        /// 
        /// 
        private void buttonopen_Click(object sender, EventArgs e)
        {


            if (comboBoxpart.Text.Equals(""))
            {
                MessageBox.Show("选择COM口");
            }
            else
            {


                try
                {
                    if (serialPort1.IsOpen)
                    {
                        serialPort1.Close();
                        buttonopen.Text = "打开串口";

                    }
                    else
                    {
                        serialPort1.PortName = comboBoxpart.Text; //配置COM XX
                        serialPort1.BaudRate = Convert.ToInt32(comboBoxbaudrate.Text); //波特率
                        serialPort1.DataBits = Convert.ToInt32(comboBoxdatabits.Text); //数据位长度
                                     //配置校验{
                        if (comboBoxparity.Text.Equals("None"))
                            serialPort1.Parity = Parity.None;
                        else if (comboBoxparity.Text.Equals("Odd"))
                            serialPort1.Parity = Parity.Odd;
                        else if (comboBoxparity.Text.Equals("Even"))
                            serialPort1.Parity = Parity.Even;
                        else if (comboBoxparity.Text.Equals("Mark"))
                            serialPort1.Parity = Parity.Mark;
                        else if (comboBoxparity.Text.Equals("Space"))
                            serialPort1.Parity = Parity.Space;

                        if (comboBoxstopbits.Text.Equals("0"))
                            serialPort1.StopBits = StopBits.None;
                        if (comboBoxstopbits.Text.Equals("1"))
                            serialPort1.StopBits = StopBits.One;
                        if (comboBoxstopbits.Text.Equals("1.5"))
                            serialPort1.StopBits = StopBits.OnePointFive;
                        if (comboBoxstopbits.Text.Equals("2"))
                            serialPort1.StopBits = StopBits.Two;
                        //}
                        serialPort1.Open();


                    }
                }
                catch (Exception  ex)
                {
                    serialPort1 = new SerialPort();
                    comboBoxpart.Items.Clear();
                    comboBoxpart.Items.AddRange(SerialPort.GetPortNames());
                    System.Media.SystemSounds.Beep.Play();
                  
                   
                }
            }
        }

串口发送

  public  void Send(TextBox textbox)
        {
           string text= textbox.Text.Replace(" ", "");
            
            StringBuilder showtext = new StringBuilder();
            try
            {
                if (serialPort1.IsOpen)
                {
                    if (radioButtonsendASCII.Checked)
                    {//ASCII发送
                        if (checkBoxnewline.Checked)
                        {//发送新行
                            if(checkBoxreturn.Checked)//回车
                            serialPort1.Write(text + "\r\n");
                            else serialPort1.Write(text + "\n");
                        }
                        else serialPort1.WriteLine(text);
                       

                        showtext.Append(text);
                    }
                    else if (radioButtonsendHEX.Checked)
                    {//HEX发送
                        byte[] BytesHex = Conversion.StringsToHexbytes(text);
                        if (checkBoxnewline.Checked)
                        {//换行
                            if (checkBoxreturn.Checked)
                            {
                                serialPort1.Write(BytesHex, 0, BytesHex.Length);
                                serialPort1.Write("\r\n");
                            }
                            else {
                                serialPort1.Write(BytesHex, 0, BytesHex.Length);
                                serialPort1.Write("\n");
                            }                            
                        }
                        else
                        {
                            serialPort1.Write(BytesHex, 0, BytesHex.Length);
                        }

                        foreach (byte b in BytesHex)
                        {
                            showtext.Append(b.ToString("X2") + " ");
                        }
                        //if (textBoxsend1.Text.Length % 2 != 0)//输入的是奇数需单独处理
                        //{
                        //    byte[] temp = new byte[1];
                        //    temp[0] = Convert.ToByte(textBoxsend1.Text.Substring(textBoxsend1.Text.Length - 1, 1), 16);
                        //    serialPort1.Write(temp, 0, 1);
                        //    showtext.Append(temp[0]);
                        //}
                    }
                    if (checkBoxshowtime.Checked)
                    {
                        textBoxreceive.AppendText("[" + DateTime.Now.TimeOfDay.ToString() + "]发:");
                    }

                    textBoxreceive.AppendText(showtext + "\r\n");
                }
            }
            catch (Exception ex)
            {
                serialPort1.Close();
                comboBoxpart.Items.Clear();
                comboBoxpart.Items.AddRange(System.IO.Ports.SerialPort.GetPortNames());
                System.Media.SystemSounds.Beep.Play();
                MessageBox.Show(ex.Message);
            }
        }

以前做的，有删减所以不知道会不会有奇怪的bug
https://download.csdn.net/download/qq_39097092/12642274