//====================================================================================================================================================================
/// <summary>
/// Gets the endpoint addresses for the specified interface number an pipe
/// </summary>
/// <param name="deviceHandle">The device handle</param>
/// <param name="alternateInterfaceNumber">The interface number</param>
/// <param name="pipeIndex">The pipe index</param>
/// <param name="pipeInformation">An instance of UsbPipeInformation</param>
/// <returns>True if the call succeeded otherwise false</returns>
//====================================================================================================================================================================
private bool McUsb_QueryPipe(SafeFileHandle deviceHandle,
byte alternateInterfaceNumber,
byte pipeIndex,
ref UsbPipeInformation pipeInformation)
{
int bytesReturned = 0;
byte[] inBuffer = new byte[] { alternateInterfaceNumber, pipeIndex };
byte[] outBuffer = new byte[sizeof(UsbPipeInformation)];
bool result = DeviceIoControl(deviceHandle,
DeviceIOControlCodes.QueryPipe,
inBuffer,
inBuffer.Length,
outBuffer,
outBuffer.Length,
ref bytesReturned,
IntPtr.Zero);
pipeInformation.PipeType = (UsbPipeType)BitConverter.ToInt32(outBuffer, 0);
pipeInformation.PipeId = (byte)BitConverter.ToChar(outBuffer, 4);
pipeInformation.MaximumPacketSize = BitConverter.ToUInt16(outBuffer, 5);
pipeInformation.Interval = (byte)BitConverter.ToChar(outBuffer, 6);
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;
}
}