C#动态绘制心率折线图串口通信

硬件背景：基于stm32芯片，挂载心率监测传感器通过蓝牙传输数据的 心率监测仪 本文将介绍下如何根据 接收到的数据进行动态绘制心率折线图（大神请绕步，此乃菜鸟分享show） 本案例是比较粗糙的动态绘制心率折线图，所以这里拿时间变量来刷新绘制折线图

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;
using System.Text.Regularexpressions;

namespace SerialportSample
{
    public partial class SerialportSampleForm : Form
    {
        private SerialPort comm = new SerialPort（）;
        private StringBuilder builder = new StringBuilder（）;//避免在事件处理方法中反复的创建，定义到外面。
        private long received_count = 0;//接收计数
        private long send_count = 0;//发送计数


        //画图需要
        private int[] RawY = new int[600];
        private int RawY0 = 0;

        //##

        public SerialportSampleForm（）
        {
            InitializeComponent（）;
        }

        //窗体初始化
        private void Form1_Load（object sender EventArgs e）
        {
            //初始化下拉串口名称列表框
            string[] ports = SerialPort.GetPortNames（）;
            Array.Sort（ports）;
            comboPortName.Items.AddRange（ports）;
            comboPortName.SelectedIndex = comboPortName.Items.Count > 0 ? 0 : -1;
            comboBaudrate.SelectedIndex = comboBaudrate.Items.IndexOf（“9600“）;

            //初始化SerialPort对象
            comm.NewLine = “\r\n“;
            comm.RtsEnable = true;//根据实际情况吧。
            comm.ReceivedBytesThreshold = 6;         //触发字节数是11   ##特别重要

            //添加事件注册
            comm.DataReceived += comm_DataReceived;
        }

        void comm_DataReceived（object sender SerialDataReceivedEventArgs e）
        {
            int n = comm.BytesToRead;//先记录下来，避免某种原因，人为的原因，操作几次之间时间长，缓存不一致
            byte[] buf = new byte[n];//声明一个临时数组存储当前来的串口数据
            received_count += n;//增加接收计数
            comm.Read（buf 0 n）;//读取缓冲数据
            builder.Clear（）;//清除字符串构造器的内容
            //因为要访问ui资源，所以需要使用invoke方式同步ui。
            this.Invoke（（EventHandler）（delegate
            {
                //判断是否是显示为16禁止
                if （checkBoxHexView.Checked）
                {
                    //依次的拼接出16进制字符串
                    foreach （byte b in buf）
                    {
                        builder.Append（b.ToString（“X2“） + “ “）;
                    }
                }
                else
                {
                    //直接按ASCII规则转换成字符串
                    builder.Append（Encoding.ASCII.GetString（buf））;
                }


                //########　　　　　　　　数据包   分析
                //
                byte h = 0;
                //String str1 = builder.ToString（）;  //   通过分析缓冲区接收到的数据包的首字符，
                String str1 = this.comm.ReadTo（“\n“）.ToString（）;
                if （str1.Length > 0）
                {
                    if （str1[0] == ‘S‘）
                    { h = 0;
                    str1 = str1.Substring（1）;
                    }
                    else if （str1[0] == ‘B‘）
                    { h = 1;
                    str1 = str1.Substring（1）;
         

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

    ....SH.        77  2016-11-02 19:57  SerialportSample\Desktop.ini

     文件     340992  2016-11-12 10:05  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Debug\Serialport.exe

     文件      36352  2016-11-12 10:05  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Debug\Serialport.pdb

     文件      23168  2016-11-12 10:05  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Debug\Serialport.vshost.exe

     文件        490  2013-03-18 17:00  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Debug\Serialport.vshost.exe.manifest

     文件     339968  2016-05-13 21:33  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Debug\SerialportSample.exe

     文件      34304  2016-05-13 21:33  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Debug\SerialportSample.pdb

     文件      24224  2016-05-13 22:18  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Debug\SerialportSample.vshost.exe

     文件        490  2015-10-30 15:19  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Debug\SerialportSample.vshost.exe.manifest

     文件     340480  2016-07-29 10:17  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Release\Serialport.exe

     文件      40448  2016-07-29 10:17  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Release\Serialport.pdb

     文件      23168  2016-08-02 11:08  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Release\Serialport.vshost.exe

     文件        490  2013-03-18 17:00  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Release\Serialport.vshost.exe.manifest

     文件        490  2015-10-30 15:19  SerialportSample\SerialportSample\SerialportSample\SerialportSample\bin\Release\SerialportSample.vshost.exe.manifest

     文件      11569  2016-08-10 07:24  SerialportSample\SerialportSample\SerialportSample\SerialportSample\Form1.cs

     文件      27919  2016-08-02 11:16  SerialportSample\SerialportSample\SerialportSample\SerialportSample\Form1.Designer.cs

     文件     483338  2016-08-02 11:16  SerialportSample\SerialportSample\SerialportSample\SerialportSample\Form1.resx

     文件       5426  2016-05-10 22:48  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

     文件       7171  2016-08-02 11:09  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件        324  2010-05-17 01:19  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\GenerateResource.read.1.tlog

     文件        812  2010-05-17 01:19  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\GenerateResource.write.1.tlog

     文件     340992  2016-11-12 10:05  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\Serialport.exe

     文件      36352  2016-11-12 10:05  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\Serialport.pdb

     文件       2835  2016-11-12 10:05  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.csproj.FileListAbsolute.txt

     文件        977  2016-08-02 11:16  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.csproj.GenerateResource.Cache

     文件       9180  2016-11-12 10:05  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.csprojResolveAssemblyReference.cache

     文件     339968  2016-05-13 21:33  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.exe

     文件      34304  2016-05-13 21:33  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.pdb

     文件        180  2016-08-02 11:10  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.Properties.Resources.resources

     文件     318866  2016-08-02 11:16  SerialportSample\SerialportSample\SerialportSample\SerialportSample\obj\x86\Debug\SerialportSample.SerialportSampleForm.resources

............此处省略42个文件信息