我有用于 AVR 微控制器的 usbasp 编程器。这个程序员使用 libusb 库。我设法将它连接到电脑，系统检测到新设备，我设法为这个设备安装驱动程序。它运行良好，因为我可以用它对 AVR 芯片进行编程。所以硬件部分是 100% OK。
现在软件部分：使用 LibUsbDotNet 对我的 libusb-win32 设备进行简单迭代，我找到了 2 个设备。它们都命名相同（并且具有相同的 VID 和 PID），所以我认为这是复合设备。第二个有一些数据。这在下面的屏幕截图中得到了很好的展示。
和代码（它只是从示例中复制粘贴）
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using LibUsbDotNet;
using LibUsbDotNet.Info;
using LibUsbDotNet.Main;
namespace USB_Test_CLI_CS {
class Program {
public static readonly int VendorID = 0x16C0;
public static readonly int ProductID = 0x05DC;
public static void Main(string[] args) {
UsbDevice usbDevice = null;
UsbRegDeviceList allDevices = UsbDevice.AllDevices;
Console.WriteLine("Found {0} devices", allDevices.Count);
foreach (UsbRegistry usbRegistry in allDevices) {
Console.WriteLine("Got device: {0}\r\n", usbRegistry.FullName);
if (usbRegistry.Open(out usbDevice)) {
Console.WriteLine("Device Information\r\n------------------");
Console.WriteLine("{0}", usbDevice.Info.ToString());
Console.WriteLine("VID & PID: {0} {1}", usbDevice.Info.Descriptor.VendorID, usbDevice.Info.Descriptor.ProductID);
Console.WriteLine("\r\nDevice configuration\r\n--------------------");
foreach (UsbConfigInfo usbConfigInfo in usbDevice.Configs) {
Console.WriteLine("{0}", usbConfigInfo.ToString());
Console.WriteLine("\r\nDevice interface list\r\n---------------------");
IReadOnlyCollection<UsbInterfaceInfo> interfaceList = usbConfigInfo.InterfaceInfoList;
foreach (UsbInterfaceInfo usbInterfaceInfo in interfaceList) {
Console.WriteLine("{0}", usbInterfaceInfo.ToString());
Console.WriteLine("\r\nDevice endpoint list\r\n--------------------");
IReadOnlyCollection<UsbEndpointInfo> endpointList = usbInterfaceInfo.EndpointInfoList;
foreach (UsbEndpointInfo usbEndpointInfo in endpointList) {
Console.WriteLine("{0}", usbEndpointInfo.ToString());
}
}
}
usbDevice.Close();
}
Console.WriteLine("\r\n----- Device information finished -----\r\n");
}
Console.WriteLine("Trying to find our device: {0} {1}", VendorID, ProductID);
UsbDeviceFinder usbDeviceFinder = new UsbDeviceFinder(VendorID, ProductID);
// This does not work !!! WHY ?
usbDevice = UsbDevice.OpenUsbDevice(usbDeviceFinder);
if (usbDevice != null) {
Console.WriteLine("OK");
} else {
Console.WriteLine("FAIL");
}
UsbDevice.Exit();
Console.Write("Press anything to close");
Console.ReadKey();
}
}
}
这是这个程序的输出
Found 2 devices
Got device: Van Ooijen Technische Informatica - USBasp
----- Device information finished -----
Got device: Van Ooijen Technische Informatica - USBasp
Device Information
------------------
Length:18
DescriptorType:Device
BcdUsb:0x0110
Class:VendorSpec
SubClass:0x00
Protocol:0x00
MaxPacketSize0:8
VendorID:0x16C0
ProductID:0x05DC
BcdDevice:0x0103
ManufacturerStringIndex:1
ProductStringIndex:2
SerialStringIndex:0
ConfigurationCount:1
ManufacturerString:www.fischl.de
ProductString:USBasp
SerialString:
VID & PID: 5824 1500
Device configuration
--------------------
Length:9
DescriptorType:Configuration
TotalLength:18
InterfaceCount:1
ConfigID:1
StringIndex:0
Attributes:0x80
MaxPower:25
ConfigString:
Device interface list
---------------------
Length:9
DescriptorType:Interface
InterfaceID:0
AlternateID:0
EndpointCount:0
Class:PerInterface
SubClass:0x00
Protocol:0x00
StringIndex:0
InterfaceString:
Device endpoint list
--------------------
----- Device information finished -----
Trying to find our device: 5824 1500
FAIL
Press anything to close
我想要的是这个简单的代码来检测存在的这个设备（因为对所有设备的简单迭代找到了它，而其他工具“USB Cfg 询问器”也找到了它）。以前有人问过这个问题，但没有建设性的答案。
我也可以使用 libusb-win32 c++ 库并为其创建一些 C# 包装器，但如果不需要它并且我可以使用 LibUsbDotNet 库，我想使用它而不是自己创建包装器。