template <uint8_t _Number, uint8_t _AlternateSetting, uint8_t _SubClass, uint8_t _Protocol, typename _Ep0, typename _Endpoint, typename... _Functionals>
class CdcCommInterface : public Interface<_Number, _AlternateSetting, DeviceAndInterfaceClass::Comm, _SubClass, _Protocol, _Ep0, _Endpoint>
{
  using Base = Interface<_Number, _AlternateSetting, DeviceAndInterfaceClass::Comm, _SubClass, _Protocol, _Ep0, _Endpoint>;
  static LineCoding _lineCoding;
  ...

switch (static_cast<CdcRequest>(setup->Request))
{
case CdcRequest::SetLineCoding:
  if(setup->Length == 7)
  {
    // Wait line coding
    _Ep0::SetOutDataTransferCallback([]{
      memcpy(&_lineCoding, reinterpret_cast<const void*>(_Ep0::RxBuffer), 7);
      _Ep0::ResetOutDataTransferCallback();
      _Ep0::SendZLP();
    });
    _Ep0::SetRxStatus(EndpointStatus::Valid);
  }
  break;
case CdcRequest::GetLineCoding:
  _Ep0::SendData(&_lineCoding, sizeof(LineCoding));
  break;
case CdcRequest::SetControlLineState:
  _Ep0::SendZLP();
  break;
default:
  break;
}

static uint16_t FillDescriptor(InterfaceDescriptor* descriptor)
{
  uint16_t totalLength = sizeof(InterfaceDescriptor);
  *descriptor = InterfaceDescriptor {
    .Number = _Number,
    .AlternateSetting = _AlternateSetting,
    .EndpointsCount = Base::EndpointsCount,
    .Class = DeviceAndInterfaceClass::Comm,
    .SubClass = _SubClass,
    .Protocol = _Protocol
  };
  uint8_t* functionalDescriptors = reinterpret_cast<uint8_t*>(descriptor);
  ((totalLength += _Functionals::FillDescriptor(&functionalDescriptors[totalLength])), ...);
  EndpointDescriptor* endpointDescriptors = reinterpret_cast<EndpointDescriptor*>(&functionalDescriptors[totalLength]);
  totalLength += _Endpoint::FillDescriptor(endpointDescriptors);
  return totalLength;
}

template <uint8_t _Number, uint8_t _AlternateSetting, uint8_t _SubClass, uint8_t _Protocol, typename _Ep0, typename _Endpoint>
class CdcDataInterface : public Interface<_Number, _AlternateSetting, DeviceAndInterfaceClass::CdcData, _SubClass, _Protocol, _Ep0, _Endpoint>
{
  using Base = Interface<_Number, _AlternateSetting, DeviceAndInterfaceClass::CdcData, _SubClass, _Protocol, _Ep0, _Endpoint>;
  ...

template<uint8_t _Number, typename _Ep0, typename _Endpoint>
using DefaultCdcCommInterface = CdcCommInterface<_Number, 0, 0x02, 0x01, _Ep0, _Endpoint, HeaderFunctional, CallManagementFunctional, AcmFunctional, UnionFunctional>;

using CdcCommEndpointBase = InEndpointBase<1, EndpointType::Interrupt, 8, 0xff>;
using CdcDataEndpointBase = BidirectionalEndpointBase<2, EndpointType::Bulk, 32, 0>;
using EpInitializer = EndpointsInitializer<DefaultEp0, CdcCommEndpointBase, CdcDataEndpointBase>;
using Ep0 = EpInitializer::ExtendEndpoint<DefaultEp0>;
using CdcCommEndpoint = EpInitializer::ExtendEndpoint<CdcCommEndpointBase>;
using CdcDataEndpoint = EpInitializer::ExtendEndpoint<CdcDataEndpointBase>;
using CdcComm = DefaultCdcCommInterface<0, Ep0, CdcCommEndpoint>;
using CdcData = CdcDataInterface<1, 0, 0, 0, Ep0, CdcDataEndpoint>;
using Config = Configuration<0, 250, false, false, CdcComm, CdcData>;
using MyDevice = Device<0x0200, DeviceAndInterfaceClass::Comm, 0, 0, 0x0483, 0x5711, 0, Ep0, Config>;

template<>
void CdcDataEndpoint::HandleRx()
{
  uint8_t* data = reinterpret_cast<uint8_t*>(CdcDataEndpoint::RxBuffer);
  uint8_t size = CdcDataEndpoint::RxBufferCount::Get();
  if(size > 0)
  {
    if(data[0] == '0')
    {
      Led::Clear();
      CdcDataEndpoint::SendData("LED is turn off\r\n", 17);
    }
    if(data[0] == '1')
    {
      Led::Set();
      CdcDataEndpoint::SendData("LED is turn on\r\n", 16);
    }
  }
  CdcDataEndpoint::SetRxStatus(EndpointStatus::Valid);
}