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

   1 uint8_t TEMPLATE_FUNC_NAME (TEMPLATE_BUFFER_TYPE const 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         Pipe_SetPipeToken(TEMPLATE_TOKEN);
  10
  11         if ((ErrorCode = Pipe_WaitUntilReady()))
  12           return ErrorCode;
  13
  14         if (BytesProcessed != NULL)
  15         {
  16                 Length -= *BytesProcessed;
  17                 TEMPLATE_BUFFER_MOVE(DataStream, *BytesProcessed);
  18         }
  19
  20         while (Length)
  21         {
  22                 if (!(Pipe_IsReadWriteAllowed()))
  23                 {
  24                         TEMPLATE_CLEAR_PIPE();
  25
  26                         if (BytesProcessed != NULL)
  27                         {
  28                                 *BytesProcessed += BytesInTransfer;
  29                                 return PIPE_RWSTREAM_IncompleteTransfer;
  30                         }
  31
  32                         if ((ErrorCode = Pipe_WaitUntilReady()))
  33                           return ErrorCode;
  34                 }
  35                 else
  36                 {
  37                         TEMPLATE_TRANSFER_BYTE(DataStream);
  38                         TEMPLATE_BUFFER_MOVE(DataStream, 1);
  39                         Length--;
  40                         BytesInTransfer++;
  41                 }
  42         }
  43
  44         return PIPE_RWSTREAM_NoError;
  45 }
  46
  47 #undef TEMPLATE_FUNC_NAME
  48 #undef TEMPLATE_BUFFER_TYPE
  49 #undef TEMPLATE_TOKEN
  50 #undef TEMPLATE_TRANSFER_BYTE
  51 #undef TEMPLATE_CLEAR_PIPE
  52 #undef TEMPLATE_BUFFER_OFFSET
  53 #undef TEMPLATE_BUFFER_MOVE