डब्लूएमआई प्रबंधन मार्ग को थोड़ा आगे लेते हुए, मैं एक रैपर वर्ग के साथ आया हूं जो Win32_SerialPorts घटनाओं पर हुक करता है और गतिशील रूप से Arduino और Digi International (X-Bee) उपकरणों के लिए सीरियल पोर्ट्स की एक सूची पॉप्युलेट करता है, पोर्टनाम और BaudRates।
अभी के लिए, मैंने Win32_SerialPorts प्रविष्टि में डिवाइस के लिए कुंजी के रूप में डिवाइस विवरण का उपयोग किया है, लेकिन इसे आसानी से बदला जा सकता है।
यह एक Arduino यूएनओ के साथ सीमित क्षमता के लिए परीक्षण किया गया है और यह स्थिर लगता है।
// -------------------------------------------------------------------------
// <copyright file="ArduinoDeviceManager.cs" company="ApacheTech Consultancy">
// Copyright (c) ApacheTech Consultancy. All rights reserved.
// </copyright>
// <license type="GNU General Public License" version="3">
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see http://www.gnu.org/licenses
// <license>
// -------------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.IO.Ports;
using System.Linq;
using System.Management;
using System.Runtime.CompilerServices;
// Automatically imported by Jetbeans Resharper
using ArduinoLibrary.Annotations;
namespace ArduinoLibrary
{
/// <summary>
/// Provides automated detection and initiation of Arduino devices. This class cannot be inherited.
/// </summary>
public sealed class ArduinoDeviceManager : IDisposable, INotifyPropertyChanged
{
/// <summary>
/// A System Watcher to hook events from the WMI tree.
/// </summary>
private readonly ManagementEventWatcher _deviceWatcher = new ManagementEventWatcher(new WqlEventQuery(
"SELECT * FROM Win32_DeviceChangeEvent WHERE EventType = 2 OR EventType = 3"));
/// <summary>
/// A list of all dynamically found SerialPorts.
/// </summary>
private Dictionary<string, SerialPort> _serialPorts = new Dictionary<string, SerialPort>();
/// <summary>
/// Initialises a new instance of the <see cref="ArduinoDeviceManager"/> class.
/// </summary>
public ArduinoDeviceManager()
{
// Attach an event listener to the device watcher.
_deviceWatcher.EventArrived += _deviceWatcher_EventArrived;
// Start monitoring the WMI tree for changes in SerialPort devices.
_deviceWatcher.Start();
// Initially populate the devices list.
DiscoverArduinoDevices();
}
/// <summary>
/// Gets a list of all dynamically found SerialPorts.
/// </summary>
/// <value>A list of all dynamically found SerialPorts.</value>
public Dictionary<string, SerialPort> SerialPorts
{
get { return _serialPorts; }
private set
{
_serialPorts = value;
OnPropertyChanged();
}
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
// Stop the WMI monitors when this instance is disposed.
_deviceWatcher.Stop();
}
/// <summary>
/// Occurs when a property value changes.
/// </summary>
public event PropertyChangedEventHandler PropertyChanged;
/// <summary>
/// Handles the EventArrived event of the _deviceWatcher control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArrivedEventArgs"/> instance containing the event data.</param>
private void _deviceWatcher_EventArrived(object sender, EventArrivedEventArgs e)
{
DiscoverArduinoDevices();
}
/// <summary>
/// Dynamically populates the SerialPorts property with relevant devices discovered from the WMI Win32_SerialPorts class.
/// </summary>
private void DiscoverArduinoDevices()
{
// Create a temporary dictionary to superimpose onto the SerialPorts property.
var dict = new Dictionary<string, SerialPort>();
try
{
// Scan through each SerialPort registered in the WMI.
foreach (ManagementObject device in
new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_SerialPort").Get())
{
// Ignore all devices that do not have a relevant VendorID.
if (!device["PNPDeviceID"].ToString().Contains("VID_2341") && // Arduino
!device["PNPDeviceID"].ToString().Contains("VID_04d0")) return; // Digi International (X-Bee)
// Create a SerialPort to add to the collection.
var port = new SerialPort();
// Gather related configuration details for the Arduino Device.
var config = device.GetRelated("Win32_SerialPortConfiguration")
.Cast<ManagementObject>().ToList().FirstOrDefault();
// Set the SerialPort's PortName property.
port.PortName = device["DeviceID"].ToString();
// Set the SerialPort's BaudRate property. Use the devices maximum BaudRate as a fallback.
port.BaudRate = (config != null)
? int.Parse(config["BaudRate"].ToString())
: int.Parse(device["MaxBaudRate"].ToString());
// Add the SerialPort to the dictionary. Key = Arduino device description.
dict.Add(device["Description"].ToString(), port);
}
// Return the dictionary.
SerialPorts = dict;
}
catch (ManagementException mex)
{
// Send a message to debug.
Debug.WriteLine(@"An error occurred while querying for WMI data: " + mex.Message);
}
}
/// <summary>
/// Called when a property is set.
/// </summary>
/// <param name="propertyName">Name of the property.</param>
[NotifyPropertyChangedInvocator]
private void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = PropertyChanged;
if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
मैंने इस कोड को आजमाया है और यह मेरी मशीन पर कुछ भी नहीं लगता है। उस समय मेरे पास एक देखा गया था। – cmroanirgo
@cmroanirgo यह डिवाइस मैनेजर में क्या दिखाता है? – Brandon
यह "यूएसबी सीरियल पोर्ट" के रूप में दिखाता है (और एक डेसिमिला भी इसका जवाब देता है)। मेरे लिए, एकमात्र असली समाधान प्रत्येक COM पोर्ट को खोलना था, एक जादू बाइट भेजना और जादू प्रतिक्रिया के लिए सुनना था, जैसे अन्य उत्तरों सुझाव देते हैं। – cmroanirgo