//====================================================================================================================================================================
/// <summary>
/// Gets the interface settings for the specified interface number
/// </summary>
/// <param name="deviceHandle">The device handle</param>
/// <param name="alternateInterfaceNumber">The interface number</param>
/// <param name="usbAltInterfaceDescriptor">An instance of UsbInterfaceDescriptor</param>
/// <returns>True if the call succeeded otherwise false</returns>
//====================================================================================================================================================================
private bool McUsb_QueryInterfaceSettings(SafeFileHandle deviceHandle,
byte alternateInterfaceNumber,
ref UsbInterfaceDescriptor usbAltInterfaceDescriptor)
{
int bytesReturned = 0;
byte[] inBuffer = new byte[]{alternateInterfaceNumber};
byte[] outBuffer = new byte[sizeof(UsbInterfaceDescriptor)];
bool result = DeviceIoControl(deviceHandle,
DeviceIOControlCodes.QueryInterfaceSettings,
inBuffer,
inBuffer.Length,
outBuffer,
outBuffer.Length,
ref bytesReturned,
IntPtr.Zero);
int bufferIndex = 0;
usbAltInterfaceDescriptor.Length = outBuffer[bufferIndex++];
usbAltInterfaceDescriptor.DescriptorType = outBuffer[bufferIndex++];
usbAltInterfaceDescriptor.InterfaceNumber = outBuffer[bufferIndex++];
usbAltInterfaceDescriptor.AlternateSetting = outBuffer[bufferIndex++];
usbAltInterfaceDescriptor.NumEndpoints = outBuffer[bufferIndex++];
usbAltInterfaceDescriptor.InterfaceClass = outBuffer[bufferIndex++];
usbAltInterfaceDescriptor.InterfaceSubClass = outBuffer[bufferIndex++];
usbAltInterfaceDescriptor.InterfaceProtocol = outBuffer[bufferIndex++];
usbAltInterfaceDescriptor.Interface = outBuffer[bufferIndex];
return result;
}
//=========================================================================
/// <summary>
/// Initialize and configures the USB device
/// </summary>
/// <param name="deviceHandle">The handle to the device</param>
/// <param name="deviceInfo">The device number</param>
//=========================================================================
protected void InitializeDevice(SafeFileHandle deviceHandle, DeviceInfo deviceInfo)
{
UsbInterfaceDescriptor uid = new UsbInterfaceDescriptor();
UsbPipeInformation pipeInfo = new UsbPipeInformation();
uid.Length = 0;
uid.DescriptorType = 0;
uid.InterfaceNumber = 0;
uid.AlternateSetting = 0;
uid.NumEndpoints = 0;
uid.InterfaceClass = 0;
uid.InterfaceSubClass = 0;
uid.InterfaceProtocol = 0;
uid.Interface = 0;
pipeInfo.PipeType = 0;
pipeInfo.PipeId = 0;
pipeInfo.MaximumPacketSize = 0;
pipeInfo.Interval = 0;
if (!deviceHandle.IsInvalid)
{
if (McUsb_QueryInterfaceSettings(deviceHandle, 0, ref uid) == true)
{
m_deviceInitialized = true;
// get the bulk pipes info
for (byte i = 0; i < uid.NumEndpoints; i++)
{
McUsb_QueryPipe(deviceHandle, 0, i, ref pipeInfo);
unsafe
{
if (pipeInfo.PipeType == UsbPipeType.Bulk)
{
if ((pipeInfo.PipeId & 0x80) == 0x80)
{
deviceInfo.EndPointIn = pipeInfo.PipeId;
deviceInfo.MaxPacketSize = pipeInfo.MaximumPacketSize;
}
else
{
deviceInfo.EndPointOut = pipeInfo.PipeId;
}
}
}
}
}
}
else
{
m_errorCode = ErrorCodes.DeviceHandleAlreadyCreated;
}
}
