|
private HidD_GetFeature ( |
||
| hidDeviceObject | ||
| lpReportBuffer | byte | |
| reportBufferLength | int | |
| return | bool | |
public bool ReadFeatureData(out byte[] data, byte reportId = 0)
{
if (_deviceCapabilities.FeatureReportByteLength > 0)
{
data = new byte[_deviceCapabilities.FeatureReportByteLength];
byte[] array = CreateFeatureOutputBuffer();
array[0] = reportId;
IntPtr intPtr = IntPtr.Zero;
bool flag = false;
try
{
intPtr = OpenDeviceIO(_devicePath, 0u);
flag = NativeMethods.HidD_GetFeature(intPtr, array, array.Length);
if (flag)
{
Array.Copy(array, 0, data, 0, Math.Min(data.Length, _deviceCapabilities.FeatureReportByteLength));
}
}
catch (Exception innerException)
{
throw new Exception($"Error accessing HID device '{_devicePath}'.", innerException);
}
finally
{
if (intPtr != IntPtr.Zero)
{
CloseDeviceIO(intPtr);
}
}
return(flag);
}
data = new byte[0];
return(false);
}
public bool ReadFeatureData(out byte[] data, byte reportId = 0)
{
if (_deviceCapabilities.FeatureReportByteLength <= 0)
{
data = new byte[0];
return(false);
}
data = new byte[_deviceCapabilities.FeatureReportByteLength];
var buffer = CreateFeatureOutputBuffer();
buffer[0] = reportId;
IntPtr hidHandle = IntPtr.Zero;
bool success = false;
try
{
if (IsOpen)
{
hidHandle = Handle;
}
else
{
hidHandle = OpenDeviceIO(_devicePath, NativeMethods.ACCESS_NONE);
}
success = NativeMethods.HidD_GetFeature(hidHandle, buffer, buffer.Length);
if (success)
{
Array.Copy(buffer, 0, data, 0, Math.Min(data.Length, _deviceCapabilities.FeatureReportByteLength));
}
}
catch (Exception exception)
{
throw new Exception(string.Format("Error accessing HID device '{0}'.", _devicePath), exception);
}
finally
{
if (hidHandle != IntPtr.Zero && hidHandle != Handle)
{
CloseDeviceIO(hidHandle);
}
}
return(success);
}
public bool readFeatureData(byte[] inputBuffer)
{
return(NativeMethods.HidD_GetFeature(safeReadHandle.DangerousGetHandle(), inputBuffer, inputBuffer.Length));
}