C#|C# 串口波形显示 C#串口波形显示

C#做的串口示波器，可以实现动态波形显示的效果。

文章图片

文章图片

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 serial1
{
public partial class Form1 : Form
{

int maxRate; //最大比例
private bool listening = false;
private bool closing = false;

Point lastPoint,nowPoint;
List l = new List(); //存储串口接收的值
Graphics g; //生成图形
Pen drawPen=new Pen(Color.Red,1);
private StringBuilder builder = new StringBuilder();

private SerialPort comm = new SerialPort();
public Form1()
【C#|C# 串口波形显示】 {
InitializeComponent();
}

private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
g = e.Graphics;
pictureBox1.Width = l.Count();
g.DrawLine(new Pen(Color.Black, 1), new Point(0, pictureBox1.Height / 2), new Point(pictureBox1.Width, pictureBox1.Height / 2));
lastPoint = new Point(0,pictureBox1.Height/2);

//如果发生值大于最大值，则画笔变为黄色
for (int i = 1; i < this.pictureBox1.Width; i++)
{
if (l[i] > maxRate/2)
{
drawPen.Color = Color.Yellow;
l[i] = maxRate/2;
}
else
{
drawPen.Color = Color.Red;
}

nowPoint.X = i;
double tmpY = l[i] / maxRate;
tmpY =Math.Abs( (tmpY * pictureBox1.Height)-(pictureBox1.Height/2));
nowPoint.Y =Convert.ToInt32( tmpY);

//nowPoint.Y = Math.Abs(l[i] / maxRate * pictureBox1.Height - pictureBox1.Height);
g.DrawLine(drawPen, lastPoint, nowPoint);
lastPoint = nowPoint;
}

}

private void Form1_Load(object sender, EventArgs e)
{

}
void comm_dataReceived(object sender, SerialDataReceivedEventArgs e)
{

if (closing) return; //防止关闭时锁死
string tmpS = comm.ReadLine();
builder.Append(tmpS);
string s = builder.ToString();
builder.Clear(); //清除字符串构造器
string[] arr = s.Split('\n', '\r').Where(t => t.Trim() != "").ToArray();

因为要访问ui资源，所以需要使用invoke方式同步ui。
this.Invoke((EventHandler)(delegate
{
try
{
int tmpC=0;
listening = true;
for (int i = 0; i < arr.Length; i++)
{
int c = Convert.ToInt32(arr[i]);
if (Math.Abs(tmpC - c) > 100) Console.Out.WriteLine("错误");
textBox1.AppendText(Convert.ToString(c)+'\n');
l.Add(c);
tmpC = c;
}

}
catch
{
;
}
finally
{
listening = false;
}
pictureBox1.Width = l.Count();
}));

}
private void button1_Click(object sender, EventArgs e)
{

comm.PortName = comboBox1.SelectedItem.ToString();
comm.BaudRate =Convert.ToInt32( comboBox2.SelectedItem.ToString());
maxRate =Convert.ToInt32( textBox2.Text);

comm.Open();
comm.DataReceived += comm_dataReceived;

}

private void button2_Click(object sender, EventArgs e)
{

closing = true;
while (listening) Application.DoEvents();
MessageBox.Show("ok");
comm.Close();
closing = false;

}
private void button4_Click(object sender, EventArgs e)
{
//16进制发送
if (checkBoxHexSend.Checked)
{
//我们不管规则了。如果写错了一些，我们允许的，只用正则得到有效的十六进制数
MatchCollection mc = Regex.Matches(txSend.Text, @"(?i)[/da-f]{2}");
List buf = new List(); //填充到这个临时列表中
//依次添加到列表中
foreach (Match m in mc)
{
buf.Add(byte.Parse(m.Value));
}
//转换列表为数组后发送
comm.Write(buf.ToArray(), 0, buf.Count);

}
else//ascii编码直接发送
{
//包含换行符
if (checkBoxNewlineSend.Checked)
{
comm.WriteLine(txSend.Text);

}
else//不包含换行符
{
comm.Write(txSend.Text);

}
}
}
}
}

转载于:https://www.cnblogs.com/bankyh/p/4330275.html