Unity3D 使用 LibUsbDotNet

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1. 先下载，下载地址： http://download.csdn.net/detail/cumtwys/7713473，下载完之后进行安装。

2. 把 LibUsbDotNet.dll 丢到Unity3D 工程中，就开始使用LibUsbDotNet库了。

3. 根据复制官方例子，进行测试

using System;using LibUsbDotNet;using LibUsbDotNet.Descriptors;using LibUsbDotNet.Info;using LibUsbDotNet.Main;using LibUsbDotNet.LudnMonoLibUsb;using System.Collections.ObjectModel;using UnityEngine;public class ShowInfo : MonoBehaviour {    public static UsbDevice MyUsbDevice;    // Use this for initialization    void Start () {        // Dump all devices and descriptor information to console output.        UsbDevice.ForceLibUsbWinBack = true;        UsbRegDeviceList allDevices = UsbDevice.AllDevices;        Debug.Log(allDevices.Count);        foreach (UsbRegistry usbRegistry in allDevices)        {            if (usbRegistry.Open(out MyUsbDevice))            {                Debug.Log(MyUsbDevice.Info.ToString());                for (int iConfig = 0; iConfig < MyUsbDevice.Configs.Count; iConfig++)                {                    UsbConfigInfo configInfo = MyUsbDevice.Configs[iConfig];                    Debug.Log(configInfo.ToString());                    ReadOnlyCollection<UsbInterfaceInfo> interfaceList = configInfo.InterfaceInfoList;                    for (int iInterface = 0; iInterface < interfaceList.Count; iInterface++)                    {                        UsbInterfaceInfo interfaceInfo = interfaceList[iInterface];                        Debug.Log(interfaceInfo.ToString());                        ReadOnlyCollection<UsbEndpointInfo> endpointList = interfaceInfo.EndpointInfoList;                        for (int iEndpoint = 0; iEndpoint < endpointList.Count; iEndpoint++)                        {                            Debug.Log(endpointList[iEndpoint].ToString());                        }                    }                }            }        }        // Free usb resources.        // This is necessary for libusb-1.0 and Linux compatibility.        UsbDevice.Exit();    }    // Update is called once per frame    void Update () {}}

4. 如果发现有报错缺少 libusb-1.0.dll 的话，就需要去下载 libusb-1.0.dll，下载地址就是，https://sourceforge.net/projects/libusb/files/libusb-1.0/libusb-1.0.19/，

下载libusb-1.0.19-rc1-win，解压就有 libusb-1.0.dll，把 libusb-1.0.dll 放到Windows/System32中就可以解决了。

5. 如果无法检测设备，那么需要运行 install-filter-win.exe 安装对应的 USB 的设备。

6. 目前发现，XBox 手柄可以识别出来。

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