如何访问C＃中的USB端口，发送数据流并接收其他数据？
答案 0 :(得分：4)
有一个.net库：SharpUSBLib
http://www.icsharpcode.net/OpenSource/SharpUSBLib/default.aspx
答案 1 :(得分：4)
术语“usb port”并不意味着什么。 USB中的B表示“总线”，它是任何类型设备与机器通信的通用方式。需要驱动程序才能使设备可用。正如您有视频卡和NIC的驱动程序一样。
使用USB模式代码的常用方法是让驱动程序模拟旧式串行端口。您将在.NET中使用SerialPort类。检查设备的规格，看看它的驱动程序是什么。
答案 2 :(得分：0)
下载一些信息和图书馆：USB & C#
答案 3 :(得分：0)
这个网站绝对有帮助你...
http://libusbdotnet.sourceforge.net
它包含一个类库和2010年发布的一些示例代码
答案 4 :(得分：0)
如果USB设备类是HID，您也可以尝试使用this C＃驱动程序。
答案 5 :(得分：0)
有许多图书馆可以完成这项工作。这是Usb.Net（https://github.com/MelbourneDeveloper/Device.Net）的三个平台的示例代码
Windows（WinUSB）
<img src="{{wing.icon.name}}" class="{{wing.icon.name}}"
#wingIconElm
*ngIf="menuConfig.showIcons || menuConfig.onlyIcons"
[ngStyle]="{
'color': wing.icon.color || menuConfig.wingFontColor,
'font-size': iconSize + 'px',
'width': iconSize + 'px',
'height': iconSize + 'px'
}">
UWP
public override Task InitializeAsync()
{
Dispose();
int errorCode;
if (string.IsNullOrEmpty(DeviceId))
{
throw new WindowsException($"{nameof(DeviceDefinition)} must be specified before {nameof(InitializeAsync)} can be called.");
}
_DeviceHandle = APICalls.CreateFile(DeviceId, (APICalls.GenericWrite | APICalls.GenericRead), APICalls.FileShareRead | APICalls.FileShareWrite, IntPtr.Zero, APICalls.OpenExisting, APICalls.FileAttributeNormal | APICalls.FileFlagOverlapped, IntPtr.Zero);
if (_DeviceHandle.IsInvalid)
{
//TODO: is error code useful here?
errorCode = Marshal.GetLastWin32Error();
if (errorCode > 0) throw new Exception($"Device handle no good. Error code: {errorCode}");
}
var isSuccess = WinUsbApiCalls.WinUsb_Initialize(_DeviceHandle, out var defaultInterfaceHandle);
HandleError(isSuccess, "Couldn't initialize device");
var bufferLength = (uint)Marshal.SizeOf(typeof(USB_DEVICE_DESCRIPTOR));
isSuccess = WinUsbApiCalls.WinUsb_GetDescriptor(defaultInterfaceHandle, WinUsbApiCalls.DEFAULT_DESCRIPTOR_TYPE, 0, 0, out _UsbDeviceDescriptor, bufferLength, out var lengthTransferred);
HandleError(isSuccess, "Couldn't get device descriptor");
byte i = 0;
//Get the first (default) interface
var defaultInterface = GetInterface(defaultInterfaceHandle);
_UsbInterfaces.Add(defaultInterface);
while (true)
{
isSuccess = WinUsbApiCalls.WinUsb_GetAssociatedInterface(defaultInterfaceHandle, i, out var interfacePointer);
if (!isSuccess)
{
errorCode = Marshal.GetLastWin32Error();
if (errorCode == APICalls.ERROR_NO_MORE_ITEMS) break;
throw new Exception($"Could not enumerate interfaces for device {DeviceId}. Error code: { errorCode}");
}
var associatedInterface = GetInterface(interfacePointer);
_UsbInterfaces.Add(associatedInterface);
i++;
}
IsInitialized = true;
RaiseConnected();
return Task.CompletedTask;
}
public override async Task<byte[]> ReadAsync()
{
return await Task.Run(() =>
{
var bytes = new byte[ReadBufferSize];
//TODO: Allow for different interfaces and pipes...
var isSuccess = WinUsbApiCalls.WinUsb_ReadPipe(_DefaultUsbInterface.Handle, _DefaultUsbInterface.ReadPipe.WINUSB_PIPE_INFORMATION.PipeId, bytes, ReadBufferSize, out var bytesRead, IntPtr.Zero);
HandleError(isSuccess, "Couldn't read data");
Tracer?.Trace(false, bytes);
return bytes;
});
}
public override async Task WriteAsync(byte[] data)
{
await Task.Run(() =>
{
if (data.Length > WriteBufferSize)
{
throw new Exception($"Data is longer than {WriteBufferSize} bytes which is the device's max buffer size.");
}
//TODO: Allow for different interfaces and pipes...
var isSuccess = WinUsbApiCalls.WinUsb_WritePipe(_DefaultUsbInterface.Handle, _DefaultUsbInterface.WritePipe.WINUSB_PIPE_INFORMATION.PipeId, data, (uint)data.Length, out var bytesWritten, IntPtr.Zero);
HandleError(isSuccess, "Couldn't write data");
Tracer?.Trace(true, data);
});
}
Android
public override async Task InitializeAsync()
{
await GetDevice(DeviceId);
if (_ConnectedDevice != null)
{
var usbInterface = _ConnectedDevice.Configuration.UsbInterfaces.FirstOrDefault();
if (usbInterface == null)
{
_ConnectedDevice.Dispose();
throw new Exception("There was no Usb Interface found for the device.");
}
var interruptPipe = usbInterface.InterruptInPipes.FirstOrDefault();
if (interruptPipe == null)
{
throw new Exception("There was no interrupt pipe found on the interface");
}
interruptPipe.DataReceived += InterruptPipe_DataReceived;
RaiseConnected();
}
else
{
throw new Exception($"Could not connect to device with Device Id {DeviceId}. Check that the package manifest has been configured to allow this device.");
}
}
public override async Task WriteAsync(byte[] bytes)
{
var bufferToSend = bytes.AsBuffer();
var usbInterface = _ConnectedDevice.Configuration.UsbInterfaces.FirstOrDefault();
var outPipe = usbInterface.InterruptOutPipes.FirstOrDefault();
await outPipe.OutputStream.WriteAsync(bufferToSend);
Tracer?.Trace(false, bytes);
}
public override async Task<byte[]> ReadAsync()
{
if (_IsReading)
{
throw new Exception("Reentry");
}
lock (_Chunks)
{
if (_Chunks.Count > 0)
{
var retVal = _Chunks[0];
Tracer?.Trace(false, retVal);
_Chunks.RemoveAt(0);
return retVal;
}
}
_IsReading = true;
_TaskCompletionSource = new TaskCompletionSource<byte[]>();
return await _TaskCompletionSource.Task;
}