LUFA/Drivers/USB/LowLevel/Template/Template_Endpoint_Control_R.c

   1 uint8_t TEMPLATE_FUNC_NAME (void* Buffer, uint16_t Length)
   2 {
   3         uint8_t* DataStream     = (uint8_t*)(Buffer + TEMPLATE_BUFFER_OFFSET(Length));
   4         bool     LastPacketFull = false;
   5
   6         if (Length > USB_ControlRequest.wLength)
   7           Length = USB_ControlRequest.wLength;
   8
   9         while (Length || LastPacketFull)
  10         {
  11                 if (Endpoint_IsSETUPReceived())
  12                   return ENDPOINT_RWCSTREAM_HostAborted;
  13
  14                 if (USB_DeviceState == DEVICE_STATE_Unattached)
  15                   return ENDPOINT_RWCSTREAM_DeviceDisconnected;
  16
  17                 if (Endpoint_IsOUTReceived())
  18                 {
  19                         LastPacketFull = (Endpoint_BytesInEndpoint() == USB_ControlEndpointSize);
  20
  21                         while (Length && Endpoint_BytesInEndpoint())
  22                         {
  23                                 TEMPLATE_TRANSFER_BYTE(DataStream);
  24                                 Length--;
  25                         }
  26
  27                         Endpoint_ClearOUT();
  28
  29                         if (!(LastPacketFull))
  30                           Length = 0;
  31                 }
  32         }
  33
  34         while (!(Endpoint_IsINReady()))
  35         {
  36                 if (USB_DeviceState == DEVICE_STATE_Unattached)
  37                   return ENDPOINT_RWCSTREAM_DeviceDisconnected;
  38         }
  39
  40         return ENDPOINT_RWCSTREAM_NoError;
  41 }
  42
  43
  44 #undef TEMPLATE_BUFFER_OFFSET
  45 #undef TEMPLATE_FUNC_NAME
  46 #undef TEMPLATE_TRANSFER_BYTE