.net6中WPF的串口通信和USB通信
之前写过串口通信，不过是winform的。
c#使用串口进行通信_c# 串口通信_故里2130的博客-CSDN博客
今天说一下，.net6中wpf的串口通信和USB通信，在工控行业中，这2种的方式非常多，还有网口通信，它们都是用来和硬件打交道的，进行交互信息。
一、串口通信
1.安装System.IO.Ports
2.基本上代码都是一样的，xaml界面
<Window x:Class="WPFPortsUSB.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WPFPortsUSB"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<StackPanel>
<TextBox Name="txtPort"/>
<Button Name="btnLink" Height="25" Content="连接" Click="btnLink_Click"/>
<TextBox Name="txtSend"/>
<Button Name="btnSend" Height="25" Content="发送" Click="btnSend_Click"/>
<TextBlock Text="接收的数据"/>
<TextBox Name="txtReceive"/>
</StackPanel>
</Window>
3.cs代码
using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace WPFPortsUSB
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
SerialPort serialPort = new SerialPort();
public MainWindow()
{
InitializeComponent();
}
private void btnLink_Click(object sender, RoutedEventArgs e)
{
string[] ports = System.IO.Ports.SerialPort.GetPortNames();
if (ports.Length == 0)
{
MessageBox.Show("本机没有串口！");
}
serialPort.PortName = ports[Convert.ToInt16(txtPort.Text)];//这里的0，就是COM1，1是COM2。因为电脑创建了2个COM串口
serialPort.BaudRate = 9600;//波特率
serialPort.DataBits = 8;//数据位
serialPort.StopBits = System.IO.Ports.StopBits.One;//停止位
//serialPort.Encoding = System.Text.Encoding.GetEncoding("GB2312");//此行非常重要，解决接收中文乱码的问题
serialPort.DataReceived += SerialPort_DataReceived;
// 打开串口
try
{
serialPort.Open();
}
catch (Exception ex)
{
//捕获到异常信息，创建一个新的comm对象，之前的不能用了。
serialPort = new System.IO.Ports.SerialPort();
//将异常信息传递给用户。
MessageBox.Show(ex.Message);
return;
}
}
private void SerialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
System.Threading.Thread.Sleep(500);
string txt = serialPort.ReadExisting();
this.Dispatcher.Invoke(new Action(() =>
{
txtReceive.Text = txt;
}));
}
private void btnSend_Click(object sender, RoutedEventArgs e)
{
serialPort.Write(txtSend.Text);
}
}
}
4.开启2个COM
5.效果
直接运行2个客户端
一个写1端口，一个写2端口，进行通信
可见，2个客户端能进行信息传送
二、USB通信
1.安装Management
2.操作USB有2种方式
一是LibUsbDotNet
二是使用P/Invoke
3.代码
using LibUsbDotNet.Main;
using LibUsbDotNet;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Management;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using LibUsbDotNet.Info;
namespace USB
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
//const int HID_DEVICE_VID = 0x093A;
//const int HID_DEVICE_PID = 0x2533;
const int HID_DEVICE_VID = 0x0461;
const int HID_DEVICE_PID = 0x4E28;
public MainWindow()
{
InitializeComponent();
}
private void btnQuery_Click(object sender, RoutedEventArgs e)
{
ManagementScope scope = new ManagementScope("\\\\.\\ROOT\\CIMV2");
ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_USBHub");
using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query))
{
ManagementObjectCollection collection = searcher.Get();
string str = string.Empty;
foreach (ManagementObject device in collection)
{
str += device["Name"].ToString() + device["DeviceID"] + "\r";
//Console.WriteLine("设备名称: " + device["Name"]);
//Console.WriteLine("设备ID: " + device["DeviceID"]);
//Console.WriteLine();
}
txtReceive.Text = str;
}
}
public static void GetUSBInfo()
{
UsbRegDeviceList allDevices = UsbDevice.AllDevices;
Console.WriteLine("Found {0} devices", allDevices.Count);
foreach (UsbRegistry usb in allDevices)
{
Console.WriteLine("----------------");
Console.WriteLine($"Device info: {usb.Device.Info.ProductString}");
Console.WriteLine($"Pid: {usb.Pid}, VID: {usb.Vid}");
}
Console.WriteLine(allDevices.Count);
}
private void btnOK_Click(object sender, RoutedEventArgs e)
{
//1.使用LibUsbDotNet
// 获取所有已连接的USB设备
GetUSBInfo();
//var usbDevices = UsbDevice.AllDevices;
遍历每个USB设备
//foreach (UsbDevice usbDevice in usbDevices)
//{
// // 打印USB设备的信息
// Console.WriteLine("设备描述: " + usbDevice.Info.DeviceDescription);
// Console.WriteLine("厂商ID: " + usbDevice.Info.UsbVendorId);
// Console.WriteLine("产品ID: " + usbDevice.Info.UsbProductId);
// Console.WriteLine();
// // 检查是否为目标设备（根据VID和PID判断）
// if (usbDevice.Info.UsbVendorId == 0x1234 && usbDevice.Info.UsbProductId == 0x5678)
// {
// try
// {
// // 打开USB设备
// usbDevice.Open();
// // 进行你的USB通信操作（读取或写入数据等）
// // ...
// // 关闭USB设备
// usbDevice.Close();
// }
// catch (Exception ex)
// {
// Console.WriteLine("发生异常: " + ex.Message);
// }
// }
//}
//2.使用P/Invoke
IntPtr deviceHandle = UsbCommunication.OpenHidDevice(HID_DEVICE_VID, HID_DEVICE_PID);
if (deviceHandle != IntPtr.Zero)
{
byte[] sendData = { /* 发送的数据 */ };
byte[] receiveData = new byte[64];
int bytesWritten = UsbCommunication.WriteHid(deviceHandle, sendData, sendData.Length);
int bytesRead = UsbCommunication.ReadHid(deviceHandle, receiveData, receiveData.Length);
// 处理接收到的数据
UsbCommunication.CloseHidDevice(deviceHandle);
}
else
{
Console.WriteLine("无法打开HID设备");
}
Console.WriteLine("按任意键退出...");
Console.ReadKey();
}
class UsbCommunication
{
// 调用底层库进行USB通信，此处省略具体实现，需要根据实际情况编写相应的P/Invoke声明和方法实现
[DllImport("usb_communication.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern IntPtr OpenHidDevice(int vid, int pid);
[DllImport("usb_communication.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int WriteHid(IntPtr handle, byte[] data, int length);
[DllImport("usb_communication.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int ReadHid(IntPtr handle, byte[] data, int length);
[DllImport("usb_communication.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern void CloseHidDevice(IntPtr handle);
}
}
}
4.效果
目前只是查询出来4个USB设备，但是对USB进行发送和接收信息，还有报错。这个似乎需要和硬件通信协议和数据传输规范有关系，否则好像成功不了，也不清楚可不可以使用虚拟的USB，类似于COM虚拟口一样操作，暂时这么记录吧。
源码
https://download.csdn.net/download/u012563853/88053882
————————————————
版权声明：本文为CSDN博主「故里2130」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/u012563853/article/details/131732968
