mightydevices / mightyhid Goto Github PK

Hi,

In the windows 7 its possible to list the devices and make the handle but every data that you send to the device, is not passed to him.

when running on desktop pc (windows 7, 8, 8.1, 10 ), problem was not.

when using tablet, system.componentmodel.win32exception was occurred.

i found native.css use 'hid.dll.'
but this tablet have not.

What should I do to fix this problem?

sorry for bad english.

---------tested with --------
Model : lenovo YOGA Tablet 2-1051F
windows 8.1, 10

I notice that my RFID card reader was not listed. The problem was CreateFile in HIDBrowser.cs.

Instead of

return Native.CreateFile(path,
    Native.GENERIC_READ | Native.GENERIC_WRITE,
    Native.FILE_SHARE_READ | Native.FILE_SHARE_WRITE,
    IntPtr.Zero, Native.OPEN_EXISTING, 
    Native.FILE_FLAG_OVERLAPPED,
    IntPtr.Zero);

I used

return Native.CreateFile(path,
    0,
    Native.FILE_SHARE_READ | Native.FILE_SHARE_WRITE,
    IntPtr.Zero, 
    Native.OPEN_EXISTING, 
    0,
    IntPtr.Zero);

Listing works fine now.

We are getting a System.ComponentModel.Win32Exception from MightyHID.HIDBrowse.Browse(), as follows:
  HResult=0x80004005
  Message = Element not found
  Source = MightyHID
  Stack trace:
   at MightyHID.HIDBrowse.GetVidPid(IntPtr handle, Int16& Vid, Int16& Pid)
   at MightyHID.HIDBrowse.Browse()
   [...]

So the VID and PID could not be retrieved for some device, and Browse() doesn't catch. I think it should, and then either skip that device altogether or fill in some invalid values (like -1) for the VID and PID. Does that sound reasonable?

Please add a license file/info.

Is there a reason you are using IntPtr instead of SafeFileHandle? It is my understanding that .NET framework SafeFileHandle will take care of properly closing the handles automatically. So SafeFileHandle would free up the native resources in most cases even if the user code doesn't and especially in the case where there is a program crashes which would certainly not close the native resources.

Hi just set everything up but get parameter incorrect. on this line.
_fileStream.Write(data, 0, data.Length);

any ideas?

error:
An unhandled exception of type 'System.IO.IOException' occurred in mscorlib.dll
Additional information: The parameter is incorrect.

This normally is a sharing issue but I don't see what would be using this stream.

Also this is a gamepad device I created with reports I use with HID.dll already (c command line tool)