LUFA/Drivers/USB/HighLevel/Template/Template_Endpoint_RW.c

   1 uint8_t TEMPLATE_FUNC_NAME (TEMPLATE_BUFFER_TYPE Buffer,
   2                             uint16_t Length,
   3                             uint16_t* const BytesProcessed)
   4 {
   5         uint8_t* DataStream      = ((uint8_t*)Buffer + TEMPLATE_BUFFER_OFFSET(Length));
   6         uint16_t BytesInTransfer = 0;
   7         uint8_t  ErrorCode;
   8
   9         if ((ErrorCode = Endpoint_WaitUntilReady()))
  10           return ErrorCode;
  11
  12         if (BytesProcessed != NULL)
  13         {
  14                 Length -= *BytesProcessed;
  15                 TEMPLATE_BUFFER_MOVE(DataStream, *BytesProcessed);
  16         }
  17
  18         while (Length)
  19         {
  20                 if (!(Endpoint_IsReadWriteAllowed()))
  21                 {
  22                         TEMPLATE_CLEAR_ENDPOINT();
  23
  24                         if (BytesProcessed != NULL)
  25                         {
  26                                 *BytesProcessed += BytesInTransfer;
  27                                 return ENDPOINT_RWSTREAM_IncompleteTransfer;
  28                         }
  29
  30                         if ((ErrorCode = Endpoint_WaitUntilReady()))
  31                           return ErrorCode;
  32                 }
  33                 else
  34                 {
  35                         TEMPLATE_TRANSFER_BYTE(DataStream);
  36                         TEMPLATE_BUFFER_MOVE(DataStream, 1);
  37                         Length--;
  38                         BytesInTransfer++;
  39                 }
  40         }
  41
  42         return ENDPOINT_RWSTREAM_NoError;
  43 }
  44
  45 #undef TEMPLATE_FUNC_NAME
  46 #undef TEMPLATE_BUFFER_TYPE
  47 #undef TEMPLATE_TRANSFER_BYTE
  48 #undef TEMPLATE_CLEAR_ENDPOINT
  49 #undef TEMPLATE_BUFFER_OFFSET
  50 #undef TEMPLATE_BUFFER_MOVE