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[英]Get input from a scanner connected to USB port or Serial Port in .net
[英]How to get signals from a scanner connected over usb
我有一台KODAK i2600掃描儀通過SX Virtual Link連接到網絡,該網絡中的每台PC都模擬與掃描儀的usb連接。 我可以很容易地找到模擬的usbs pid和vid:
或這個:
我試圖用LibUsbDotNet檢測信號,但是他們的例子它不起作用。 我試過這個例子:
public static UsbDevice MyUsbDevice;
#region SET YOUR USB Vendor and Product ID!
public static UsbDeviceFinder MyUsbFinder = new UsbDeviceFinder(int.Parse("040a", System.Globalization.NumberStyles.HexNumber), int.Parse("601d", System.Globalization.NumberStyles.HexNumber));
#endregion
public static void Main(string[] args)
{
ErrorCode ec = ErrorCode.None;
try
{
// Find and open the usb device.
MyUsbDevice = UsbDevice.OpenUsbDevice(MyUsbFinder);
// If the device is open and ready
if (MyUsbDevice == null) throw new Exception("Device Not Found.");
// If this is a "whole" usb device (libusb-win32, linux libusb-1.0)
// it exposes an IUsbDevice interface. If not (WinUSB) the
// 'wholeUsbDevice' variable will be null indicating this is
// an interface of a device; it does not require or support
// configuration and interface selection.
IUsbDevice wholeUsbDevice = MyUsbDevice as IUsbDevice;
if (!ReferenceEquals(wholeUsbDevice, null))
{
// This is a "whole" USB device. Before it can be used,
// the desired configuration and interface must be selected.
// Select config #1
wholeUsbDevice.SetConfiguration(1);
// Claim interface #0.
wholeUsbDevice.ClaimInterface(0);
}
// open read endpoint 1.
UsbEndpointReader reader = MyUsbDevice.OpenEndpointReader(ReadEndpointID.Ep01);
byte[] readBuffer = new byte[1024];
while (ec == ErrorCode.None)
{
int bytesRead;
// If the device hasn't sent data in the last 5 seconds,
// a timeout error (ec = IoTimedOut) will occur.
ec = reader.Read(readBuffer, 5000, out bytesRead);
if (bytesRead == 0) throw new Exception(string.Format("{0}:No more bytes!", ec));
Console.WriteLine("{0} bytes read", bytesRead);
// Write that output to the console.
Console.Write(Encoding.Default.GetString(readBuffer, 0, bytesRead));
}
Console.WriteLine("\r\nDone!\r\n");
}
catch (Exception ex)
{
Console.WriteLine();
Console.WriteLine((ec != ErrorCode.None ? ec + ":" : String.Empty) + ex.Message);
}
finally
{
if (MyUsbDevice != null)
{
if (MyUsbDevice.IsOpen)
{
// If this is a "whole" usb device (libusb-win32, linux libusb-1.0)
// it exposes an IUsbDevice interface. If not (WinUSB) the
// 'wholeUsbDevice' variable will be null indicating this is
// an interface of a device; it does not require or support
// configuration and interface selection.
IUsbDevice wholeUsbDevice = MyUsbDevice as IUsbDevice;
if (!ReferenceEquals(wholeUsbDevice, null))
{
// Release interface #0.
wholeUsbDevice.ReleaseInterface(0);
}
MyUsbDevice.Close();
}
MyUsbDevice = null;
// Free usb resources
UsbDevice.Exit();
}
// Wait for user input..
Console.ReadKey();
}
}
在此示例中,當我嘗試打開USB設備時,結果為null
。 所以我試圖通過這個例子檢測來自任何USB設備的任何信號:
public static IDeviceNotifier UsbDeviceNotifier = DeviceNotifier.OpenDeviceNotifier();
private static void Main(string[] args)
{
// Hook the device notifier event
UsbDeviceNotifier.OnDeviceNotify += OnDeviceNotifyEvent;
// Exit on and key pressed.
Console.Clear();
Console.WriteLine();
Console.WriteLine("Waiting for system level device events..");
Console.Write("[Press any key to exit]");
while (!Console.KeyAvailable)
Application.DoEvents();
UsbDeviceNotifier.Enabled = false; // Disable the device notifier
// Unhook the device notifier event
UsbDeviceNotifier.OnDeviceNotify -= OnDeviceNotifyEvent;
}
private static void OnDeviceNotifyEvent(object sender, DeviceNotifyEventArgs e)
{
// A Device system-level event has occured
Console.SetCursorPosition(0,Console.CursorTop);
Console.WriteLine(e.ToString()); // Dump the event info to output.
Console.WriteLine();
Console.Write("[Press any key to exit]");
}`
在這個例子中,我只能檢測connect
和disconnect
信號。 所以我試圖用LibUsbDotNet連接到USB鍵盤/鼠標端口,這也沒有用。
似乎我
severely
不明白這里需要做些什么。
接下來,我甚至試圖通過這個例子來檢查某個USB設備是否完全連接起來: USB設備連接即使這樣也行不通。
總結一下,我需要這樣做:
我想你可以從供應商那里獲得柯達完美頁面SDK 。 Pinvoke供應商提供的電話。
查看鏈接http://www.kodak.com/eknec/PageQuerier.jhtml?pq-path=2714&pq-locale=en_US&_requestid=3863鏈接中的開發人員工具部分
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