C#实现串口示波器

开发工具

visual studio2019

C#串口示波器，实时刷新端口号，动态绘制多条折线，获取串口数据并输出到文本框

之前用Java实现串口示波器对我来说还是比较困难的，而且实现的效果不尽如人意，就用C#开发了。

C#可以自由布置界面，在工具栏直接拖拽控件到窗体，然后双击控件就能添加事件了，很方便

最终效果是实现了，但是有个数据丢失的问题

数据处理到绘图分三个步骤： 1、获取串口发送的数据 2、把数据按需要提取到中间容器集合list1中 3、从集合中提取绘图的y值

测试得出的结果就是数据放进集合前不存在丢失，从集合中拿出数据这一过程也没问题。所以问题就出在第二步了，已解决（按需提取数据的规则要尽可能设置的详细一点就行）。

代码：

namespace CommPortsDesigner { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) //窗体运行完成即为加载，加载完成会触发事件 { } //传入原始数据datas及需要匹配的字符串r，得到需要的数据列表list private List<int> DealData(string datas, Regex r, string split) { if (string.IsNullOrEmpty(datas)) { throw new ArgumentException($"“{nameof(datas)}”不能是 Null 或为空。", nameof(datas)); } List<int> list1=new List<int> { }; string s1=""; MatchCollection mc = r.Matches(datas); //提取符合要求的字符串 for (int i = 0; i < mc.Count; i++) { textBox2.AppendText(mc[i].Value + "\r\n"); //测试数据是否正确输出 s1 = s1 + mc[i].Value; } string[] d = s1.Split( new string[]{split}, StringSplitOptions.RemoveEmptyEntries); for (int i=0;i<d.Length;i++) //将数字存入列表 { list1.Add( int.Parse(d[i])); } //测试画图用的数据是否解析正确 if (split.Equals("LP4:")) { foreach (int m in list1) { textBox3.AppendText(m + "\r\n"); } } return list1; } private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { } private void comboBox2_SelectedIndexChanged(object sender, EventArgs e) { serialPort1.BaudRate = int.Parse(comboBox2.SelectedItem.ToString()); } private void searchPort() { string Buffer; comboBox1.Items.Clear(); for (int i = 1; i < 20; i++) { try { Buffer = "COM" + i.ToString(); serialPort1.PortName = Buffer; serialPort1.Open(); comboBox1.Items.Add(Buffer); comboBox1.SelectedItem = Buffer; serialPort1.Close(); } catch { } } } private void getDatas() { System.Text.RegularExpressions.Regex r1 = new System.Text.RegularExpressions.Regex("LP1:(-?)\\d+"); System.Text.RegularExpressions.Regex r2 = new System.Text.RegularExpressions.Regex("LP2:(-?)\\d+"); System.Text.RegularExpressions.Regex r3 = new System.Text.RegularExpressions.Regex("LP3:(-?)\\d+"); System.Text.RegularExpressions.Regex r4 = new System.Text.RegularExpressions.Regex("LP4:(-?)\\d+"); System.Text.RegularExpressions.Regex r5 = new System.Text.RegularExpressions.Regex("LP5:(-?)\\d+"); System.Text.RegularExpressions.Regex r6 = new System.Text.RegularExpressions.Regex("CC1:(-?)\\d+"); System.Text.RegularExpressions.Regex r7 = new System.Text.RegularExpressions.Regex("CC2:(-?)\\d+"); System.Text.RegularExpressions.Regex r8 = new System.Text.RegularExpressions.Regex("CC3:(-?)\\d+"); System.Text.RegularExpressions.Regex r9 = new System.Text.RegularExpressions.Regex("CC4:(-?)\\d+"); System.Text.RegularExpressions.Regex r10 = new System.Text.RegularExpressions.Regex("CC5:(-?)\\d+"); byte[] inbuffer = null; //Queue<int> q1 = new Queue<int>(); if (serialPort1.IsOpen && serialPort1.BytesToRead > 0) { chart1.ChartAreas[0].AxisX.LabelStyle.Format = "hh:mm:ss.ff"; chart1.ChartAreas[0].AxisX.IntervalType = DateTimeIntervalType.Milliseconds; chart1.ChartAreas[0].AxisX.MajorGrid.IntervalType = DateTimeIntervalType.Milliseconds; try { inbuffer = new byte[serialPort1.BytesToRead]; serialPort1.Read(inbuffer, 0, serialPort1.BytesToRead); string strRaad = ASCIIEncoding.ASCII.GetString(inbuffer, 0, inbuffer.Length); textBox1.AppendText(strRaad); chart1.ChartAreas[0].AxisX.Minimum = DateTime.Now.AddSeconds(-5).ToOADate(); chart1.ChartAreas[0].AxisX.Maximum = DateTime.Now.ToOADate(); chart1.ChartAreas[0].AxisX.Interval = 500; if (btn_start.Text.Equals("停止")) { //LP1 if (checkBox2.Checked) { foreach (int y in DealData(strRaad, r2, "LP2:")) { chart1.Series[1].Points.AddXY(DateTime.Now.ToOADate(), y); //count2 = count2 + 5; } } else { chart1.Series[1].Points.Clear(); } //LP2 if (checkBox2.Checked) { foreach (int y in DealData(strRaad, r2, "LP2:")) { chart1.Series[1].Points.AddXY(DateTime.Now.ToOADate(), y); //count2 = count2 + 5; } } else { chart1.Series[1].Points.Clear(); } //LP3 if (checkBox3.Checked) { foreach (int y in DealData(strRaad, r3, "LP3:")) { chart1.Series[2].Points.AddXY(DateTime.Now.ToOADate(), y); //count3 = count3 + 5; } } else { chart1.Series[2].Points.Clear(); } //LP4 if (checkBox4.Checked) { foreach (int y in DealData(strRaad, r4, "LP4:")) { chart1.Series[3].Points.AddXY(DateTime.Now.ToOADate(), y); //count4 = count4 + 5; } } else { chart1.Series[3].Points.Clear(); } //LP5 if (checkBox5.Checked) { foreach (int y in DealData(strRaad, r5, "LP5:")) { chart1.Series[4].Points.AddXY(DateTime.Now.ToOADate(), y); //count5 = count5 + 5; } } else { chart1.Series[4].Points.Clear(); } //CC1 if (checkBox6.Checked) { foreach (int y in DealData(strRaad, r6, "CC1:")) { chart1.Series[5].Points.AddXY(DateTime.Now.ToOADate(), y); //count6 = count6 + 5; } } else { chart1.Series[5].Points.Clear(); } //CC2 if (checkBox7.Checked) { foreach (int y in DealData(strRaad, r7, "CC2:")) { chart1.Series[6].Points.AddXY(DateTime.Now.ToOADate(), y); //count7 = count7 + 5; } } else { chart1.Series[6].Points.Clear(); } //CC3 if (checkBox8.Checked) { foreach (int y in DealData(strRaad, r8, "CC3:")) { chart1.Series[7].Points.AddXY(DateTime.Now.ToOADate(), y); //count8 = count8 + 5; } } else { chart1.Series[8].Points.Clear(); } //CC4 if (checkBox9.Checked) { foreach (int y in DealData(strRaad, r9, "CC4:")) { chart1.Series[8].Points.AddXY(DateTime.Now.ToOADate(), y); //count9 = count9 + 5; } } else { chart1.Series[8].Points.Clear(); } //CC5 if (checkBox10.Checked) { foreach (int y in DealData(strRaad, r10, "CC5:")) { chart1.Series[9].Points.AddXY(DateTime.Now.ToOADate(), y); //count10 = count10 + 5; } } else { chart1.Series[9].Points.Clear(); } } } catch { } } } private void btn_open_Click(object sender, EventArgs e) { if (serialPort1.IsOpen||btn_open.Text.Equals("关闭")) { try { serialPort1.Close(); btn_open.Text = "打开"; } catch { } } else { try { serialPort1.PortName = comboBox1.Text; serialPort1.Open(); btn_open.Text = "关闭"; } catch { MessageBox.Show("串口打开失败！", "错误"); } } } private void timer1_Tick(object sender, EventArgs e) { if (!serialPort1.IsOpen) { searchPort(); } else{} getDatas(); } private void btn_clear_Click(object sender, EventArgs e) { textBox1.Clear(); } private void btn_save_Click(object sender, EventArgs e) { if (this.textBox1.TextLength > 0) { string path = "D:\\log.txt"; using (StreamWriter sw = new StreamWriter(path, true)) { String time = DateTime.Now.ToLocalTime().ToString(); sw.WriteLine("\n" + time); sw.Write(this.textBox1.Text); } MessageBox.Show("已保存到 D:\\log.txt！"); } } private void btn_start_Click(object sender, EventArgs e) { if (serialPort1.IsOpen) { if (btn_start.Text.Equals("开始")) { try { btn_start.Text = "停止"; } catch { } } else { try { btn_start.Text = "开始"; } catch { } } } else { if (btn_start.Text.Equals("停止")) { try { btn_start.Text = "开始"; } catch { } } else { MessageBox.Show("串口未打开！"); } } } } }

因为第一次开发，所以要实现的功能代码都放在一个类里了，大家将就着看吧

最终实现的效果