/// <summary>
/// Sets the integer value of a Hid feature code.
/// </summary>
/// <param name="featureCode">The Hid feature code to set.</param>
/// <param name="value">The value to set.</param>
/// <returns></returns>
/// <remarks></remarks>
public bool HidSetFeature(byte featureCode, int value)
{
bool HidSetFeatureRet = default;
var hfile = HidFeatures.OpenHid(this);
if (hfile == IntPtr.Zero)
{
return(false);
}
var mm = new MemPtr();
mm.Alloc(5L);
mm.ByteAt(0L) = featureCode;
mm.IntAtAbsolute(1L) = value;
if (!UsbLibHelpers.HidD_SetFeature(hfile, mm, 5))
{
HidSetFeatureRet = false;
}
else
{
HidSetFeatureRet = true;
}
HidFeatures.CloseHid(hfile);
mm.Free();
return(HidSetFeatureRet);
}
private void StartWatching(HidDeviceInfo d)
{
IntPtr h;
int i = 0;
if (_devThread is object)
{
StopWatching();
}
var s = new ObservableCollection <string>();
_lastDevice = d;
this.ViewingArea.ItemsSource = s;
for (i = 0; i <= 255; i++)
{
s.Add("");
}
var th = new Thread(() =>
{
cts = new CancellationTokenSource();
h = HidFeatures.OpenHid(d);
if ((long)h <= 0L)
{
return;
}
var mm = new MemPtr(65L);
try
{
do
{
this.Dispatcher.Invoke(() =>
{
for (i = 0; i <= 255; i++)
{
mm.LongAtAbsolute(1L) = 0L;
mm.ByteAt(0L) = (byte)i;
if (HidD_GetFeature(h, mm, 65))
{
s[i] = "HID CODE " + i.ToString("X2") + " = " + mm.IntAtAbsolute(1L);
}
}
});
Thread.Sleep(1000);
if (cts is null || cts.IsCancellationRequested)
{
break;
}
}while (true);
mm.Free();
HidFeatures.CloseHid(h);
cts = null;
return;
}
catch (ThreadAbortException)
{
mm.Free();
HidFeatures.CloseHid(h);
cts = null;
return;
}
catch (Exception)
{
mm.Free();
HidFeatures.CloseHid(h);
cts = null;
return;
}
});
th.IsBackground = true;
th.SetApartmentState(ApartmentState.STA);
_devThread = th;
th.Start();
}