soldernerd/hid_utility

This open source (GNU GPLv3) project is aimed at simplifying the development of C# applications that communicate with USB HID (Human Interface Device) devices.

hid_utility's Issues

Error getting Device Details

Hi, I loaded your demo project, change the VID and PID to a known device, When trying to connect here:

if (SetupDiEnumDeviceInterfaces(DeviceInfoTable, IntPtr.Zero, ref InterfaceClassGuid, InterfaceIndex, ref InterfaceDataStructure)) { ErrorStatus = (uint)Marshal.GetLastWin32Error(); if (ErrorStatus == ERROR_NO_MORE_ITEMS) //Did we reach the end of the list of matching devices in the DeviceInfoTable? { //Cound not find the device. Must not have been attached. SetupDiDestroyDeviceInfoList(DeviceInfoTable); //Clean up the old structure we no longer need. return null; } } else //Else some other kind of unknown error ocurred... { ErrorStatus = (uint)Marshal.GetLastWin32Error(); SetupDiDestroyDeviceInfoList(DeviceInfoTable); //Clean up the old structure we no longer need. return null; // error here }

SetupDiEnumDeviceInterfaces returns error 1784

Raw Input messages not received when app loses focus

Hi. Thank you for creating this intriguing program.

I have had some success getting your demo application to read XBox One gamepads. Unfortunately - I only receive Input buffer data when running HidDemoWindowsForms, and even then the form MUST be in focus for button presses to be registered.

I am trying to run HID Utility as a service in the background - something to quietly log buffer data changes while other applications run over the top of it.

To reproduce the loss of focus issue, simply:

1. Run the Windows Demo application.
2. Press some buttons on the controller to verify packets are being received in the form.
3. Open a windowed application (such as Paint, or Notepad), and bring said application to the foreground / into focus. Ensure you can still see the form packet data stats in the Windows Demo Form behind it.
4. Press some more buttons.

Actual Outcome:
No packets are received while Windows Demo app is out of focus.

Desired Outcome:
Packets continue to be received if the Windows Demo app is out of focus, or even minimised. The 'packets received' stats in the form would show this in real-time.

I would greatly appreciate your thoughts on how I can make this work.

Ideally - I would like to achieve this outcome with a console-only version of your Windows Demo app, but I don't believe a device can be registered to the console window handler. (At any rate - I imagine I would have the same issues when the console loses focus).

Thanks!

Windows forms demo bug

Dear, i have used Hid_Utility as it was really good working software and reliable. Suddenly, it have stucked at one point, it stucked at point that Vid & Pid selected device is connected and working, if you unplug it and replug, program hangs. First it was seen as some error in dll, i na usb searcher.. But it is not. It is just found to be writing to textbox of devices found. Im not c expert, but workaround works,, That is how it was:

           string txt = "";
            foreach (Device dev in HidUtil.DeviceList)
            {
                string devString = string.Format("VID=0x{0:X4} PID=0x{1:X4}: {2} ({3})", dev.Vid, dev.Pid, dev.Caption, dev.Manufacturer);
                txt += devString + Environment.NewLine;
            }
            DevicesTextBox.Text = txt.TrimEnd('\n');

Changed to this:

          DevicesTextBox.Text = "";
            foreach (Device dev in HidUtil.DeviceList)
            {
                string devString = string.Format("VID=0x{0:X4} PID=0x{1:X4}: {2} ({3})", dev.Vid, dev.Pid, dev.Caption, dev.Manufacturer);
                DevicesTextBox.Text = DevicesTextBox.Text + Environment.NewLine + devString;
            }

I hope it helps to anyone! And thanks for that DLL,

Bostjan

Non-blocking reading

Hello and thank you for making this utility!
Is there any way to have an event-based receiption of reports? I mean now if I try to read a report from a device, but device haven't sent it yet, the code stalls at WinAPI ReadFile function. So I unable neither read any reports nor write them to the device untill device send me something.
I'm not sure, but can write/read report operations execute asynchronously?

Can the out buffer be greater than 64 bytes?

First, thanks for a really easy to use HID API. I am working on a project where I need to transfer more than 64 bytes. Can the out buffer be greater than 64 bytes?