libusbdonet read
时间: 2023-09-05 22:08:29 浏览: 50
libusbdotnet is a library for accessing USB devices in .NET applications. The "read" function in libusbdotnet is used to read data from a USB device.
To use the "read" function, you first need to open a connection to the USB device using the "Open" function. Once you have an open connection, you can call the "read" function to read data from the device.
The "read" function takes several parameters, including the USB device handle, a buffer to hold the data, the number of bytes to read, and a timeout value. The function will block until either the requested number of bytes have been read or the timeout value has elapsed.
Here is an example of using the "read" function in C#:
```csharp
byte[] buffer = new byte[64]; // create a buffer to hold the data
int bytesRead = 0;
// open a connection to the USB device
UsbDevice device = UsbDevice.OpenDeviceWithVidPid(vid, pid);
// read up to 64 bytes of data from the device
bytesRead = device.Read(buffer, 0, 64, 1000);
// do something with the data
Console.WriteLine("Read {0} bytes of data: {1}", bytesRead, BitConverter.ToString(buffer));
```
In this example, we open a connection to a USB device with a specified vendor ID (vid) and product ID (pid). We then call the "read" function to read up to 64 bytes of data from the device with a timeout of 1000 milliseconds. Finally, we print out the number of bytes read and the data itself.
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