LUFA/Drivers/USB/Core/XMEGA/Template/Template_Endpoint_RW.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2020.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2020  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaims all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 #if defined(TEMPLATE_FUNC_NAME)
  32
  33 uint8_t TEMPLATE_FUNC_NAME (TEMPLATE_BUFFER_TYPE const Buffer,
  34                             uint16_t Length,
  35                             uint16_t* const BytesProcessed)
  36 {
  37         uint8_t* DataStream      = ((uint8_t*)Buffer + TEMPLATE_BUFFER_OFFSET(Length));
  38         uint16_t BytesInTransfer = 0;
  39         uint8_t  ErrorCode;
  40
  41         if ((ErrorCode = Endpoint_WaitUntilReady()))
  42           return ErrorCode;
  43
  44         if (BytesProcessed != NULL)
  45         {
  46                 Length -= *BytesProcessed;
  47                 TEMPLATE_BUFFER_MOVE(DataStream, *BytesProcessed);
  48         }
  49
  50         while (Length)
  51         {
  52                 if (!(Endpoint_IsReadWriteAllowed()))
  53                 {
  54                         TEMPLATE_CLEAR_ENDPOINT();
  55
  56                         #if !defined(INTERRUPT_CONTROL_ENDPOINT)
  57                         USB_USBTask();
  58                         #endif
  59
  60                         if (BytesProcessed != NULL)
  61                         {
  62                                 *BytesProcessed += BytesInTransfer;
  63                                 return ENDPOINT_RWSTREAM_IncompleteTransfer;
  64                         }
  65
  66                         if ((ErrorCode = Endpoint_WaitUntilReady()))
  67                           return ErrorCode;
  68                 }
  69                 else
  70                 {
  71                         TEMPLATE_TRANSFER_BYTE(DataStream);
  72                         TEMPLATE_BUFFER_MOVE(DataStream, 1);
  73                         Length--;
  74                         BytesInTransfer++;
  75                 }
  76         }
  77
  78         return ENDPOINT_RWSTREAM_NoError;
  79 }
  80
  81 #undef TEMPLATE_FUNC_NAME
  82 #undef TEMPLATE_BUFFER_TYPE
  83 #undef TEMPLATE_TRANSFER_BYTE
  84 #undef TEMPLATE_CLEAR_ENDPOINT
  85 #undef TEMPLATE_BUFFER_OFFSET
  86 #undef TEMPLATE_BUFFER_MOVE
  87
  88 #endif
  89