LUFA/Drivers/USB/LowLevel/Template/Template_Endpoint_Control_W.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 && !(Endpoint_IsOUTReceived()))
  10         {
  11                 while (!(Endpoint_IsINReady()))
  12                 {
  13                         if (USB_DeviceState == DEVICE_STATE_Unattached)
  14                           return ENDPOINT_RWCSTREAM_DeviceDisconnected;
  15                 }
  16
  17                 while (Length && (Endpoint_BytesInEndpoint() < USB_ControlEndpointSize))
  18                 {
  19                         TEMPLATE_TRANSFER_BYTE(DataStream);
  20                         Length--;
  21                 }
  22
  23                 LastPacketFull = (Endpoint_BytesInEndpoint() == USB_ControlEndpointSize);
  24                 Endpoint_ClearIN();
  25         }
  26
  27         if (Endpoint_IsOUTReceived())
  28           return ENDPOINT_RWCSTREAM_HostAborted;
  29
  30         if (LastPacketFull)
  31         {
  32                 while (!(Endpoint_IsINReady()))
  33                 {
  34                         if (USB_DeviceState == DEVICE_STATE_Unattached)
  35                           return ENDPOINT_RWCSTREAM_DeviceDisconnected;
  36                 }
  37
  38                 Endpoint_ClearIN();
  39         }
  40
  41         while (!(Endpoint_IsOUTReceived()))
  42         {
  43                 if (USB_DeviceState == DEVICE_STATE_Unattached)
  44                   return ENDPOINT_RWCSTREAM_DeviceDisconnected;
  45         }
  46
  47         return ENDPOINT_RWCSTREAM_NoError;
  48 }
  49
  50 #undef TEMPLATE_BUFFER_OFFSET
  51 #undef TEMPLATE_FUNC_NAME
  52 #undef TEMPLATE_TRANSFER_BYTE