[英]C# serialport communication for Arduino
I made a little application for my Arduino in C#. 我用C#为Arduino开发了一个小应用程序。 Everything works fine, but the problem is in my application. 一切正常,但问题出在我的应用程序中。 The user can chose his/hers COM port in a numericUpDown. 用户可以在numericUpDown中选择他/她的COM端口。
It works, but if the user chose the wrong port and tries to connect, it crashes, so I was thinking I need an IF statmant that gives a message. 它可以工作,但是如果用户选择了错误的端口并尝试连接,则会崩溃,因此我以为我需要提供消息的IF statmant。 For example, the wrong port, etc., but I don't know how to make it. 例如,错误的端口等,但是我不知道该怎么做。 How can I do it? 我该怎么做?
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;
using System.IO.Ports;
namespace IO_Arduino_experiment_project
{
public partial class Form1 : Form
{
public static System.IO.Ports.SerialPort serialPort1;
private delegate void LineReceivedEvent(string line);
public Form1()
{
InitializeComponent();
button5.Enabled = false;
button2.Enabled = false;
button3.Enabled = false;
}
private void button1_Click(object sender, EventArgs e) // Connect Button
{
System.ComponentModel.IContainer components = new System.ComponentModel.Container();
serialPort1 = new System.IO.Ports.SerialPort(components); // Creating the new object.
serialPort1.PortName = "COM" + numericUpDown1.Value.ToString(); // Setting what port number.
serialPort1.BaudRate = 9600;
serialPort1.DtrEnable = true;
serialPort1.Open(); // Open the port for use.
button1.Text = "Connected.";
button1.Enabled = false;
numericUpDown1.Enabled = false;
button5.Enabled = true;
button2.Enabled = true;
button3.Enabled = true;
}
private void numericUpDown1_ValueChanged(object sender, EventArgs e)
{
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (serialPort1.IsOpen) serialPort1.Close();
}
private void button2_Click(object sender, EventArgs e)
{
serialPort1.Write("1");
textBox1.Text = "LED is on!";
button2.Enabled = false;
button3.Enabled = true;
}
private void button3_Click(object sender, EventArgs e)
{
serialPort1.Write("0");
textBox1.Text = "LED is off!";
button2.Enabled = true;
button3.Enabled = false;
}
private void button4_Click(object sender, EventArgs e)
{
Close();
}
private void button5_Click(object sender, EventArgs e)
{
serialPort1.Close();
button1.Enabled = true;
numericUpDown1.Enabled = true;
}
}
}
You should really replace the numeric up/down with a ComboBox
or some other list control/menu that populates when the form opens or when a refresh button is clicked (or by other automatic means such as a timer). 您应该真正用ComboBox
或在列表打开时或单击刷新按钮时(或通过其他自动方式,例如计时器)填充的其他列表控件/菜单替换上/下数字。
The ComboBox
or List
can be filled using the GetPortNames
method:- 可以使用GetPortNames
方法填充ComboBox
或List
:
String[] pNames;
pNames = System.IO.Ports.SerialPort.GetPortNames();
If you want to do what you have described then you can lookup the port to see if it exists prior to attempted use using similar code:- 如果您要执行所描述的操作,则可以使用类似的代码查找端口,以在尝试使用之前查看该端口是否存在:
if (System.IO.Ports.SerialPort.GetPortNames().indexOf("COM" + thePortNum.ToString())>-1)
Note that GetPortNames()
returns a list like this:- 请注意, GetPortNames()
返回如下列表:
COM1
COM10
COM12
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