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- /*
- LUFA Library
- Copyright (C) Dean Camera, 2014.
-
- dean [at] fourwalledcubicle [dot] com
- www.lufa-lib.org
- */
-
- /*
- Copyright 2014 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
- all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- The author disclaims all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
- */
-
- #include "../../../../Common/Common.h"
- #if (ARCH == ARCH_UC3)
-
- #define __INCLUDE_FROM_USB_DRIVER
- #include "../USBMode.h"
-
- #if defined(USB_CAN_BE_HOST)
-
- #include "PipeStream_UC3.h"
-
- uint8_t Pipe_Discard_Stream(uint16_t Length,
- uint16_t* const BytesProcessed)
- {
- uint8_t ErrorCode;
- uint16_t BytesInTransfer = 0;
-
- Pipe_SetPipeToken(PIPE_TOKEN_IN);
-
- if ((ErrorCode = Pipe_WaitUntilReady()))
- return ErrorCode;
-
- if (BytesProcessed != NULL)
- Length -= *BytesProcessed;
-
- while (Length)
- {
- if (!(Pipe_IsReadWriteAllowed()))
- {
- Pipe_ClearIN();
-
- if (BytesProcessed != NULL)
- {
- *BytesProcessed += BytesInTransfer;
- return PIPE_RWSTREAM_IncompleteTransfer;
- }
-
- if ((ErrorCode = Pipe_WaitUntilReady()))
- return ErrorCode;
- }
- else
- {
- Pipe_Discard_8();
-
- Length--;
- BytesInTransfer++;
- }
- }
-
- return PIPE_RWSTREAM_NoError;
- }
-
- uint8_t Pipe_Null_Stream(uint16_t Length,
- uint16_t* const BytesProcessed)
- {
- uint8_t ErrorCode;
- uint16_t BytesInTransfer = 0;
-
- Pipe_SetPipeToken(PIPE_TOKEN_OUT);
-
- if ((ErrorCode = Pipe_WaitUntilReady()))
- return ErrorCode;
-
- if (BytesProcessed != NULL)
- Length -= *BytesProcessed;
-
- while (Length)
- {
- if (!(Pipe_IsReadWriteAllowed()))
- {
- Pipe_ClearOUT();
-
- if (BytesProcessed != NULL)
- {
- *BytesProcessed += BytesInTransfer;
- return PIPE_RWSTREAM_IncompleteTransfer;
- }
-
- USB_USBTask();
-
- if ((ErrorCode = Pipe_WaitUntilReady()))
- return ErrorCode;
- }
- else
- {
- Pipe_Write_8(0);
-
- Length--;
- BytesInTransfer++;
- }
- }
-
- return PIPE_RWSTREAM_NoError;
- }
-
- /* The following abuses the C preprocessor in order to copy-paste common code with slight alterations,
- * so that the code needs to be written once. It is a crude form of templating to reduce code maintenance. */
-
- #define TEMPLATE_FUNC_NAME Pipe_Write_Stream_LE
- #define TEMPLATE_BUFFER_TYPE const void*
- #define TEMPLATE_TOKEN PIPE_TOKEN_OUT
- #define TEMPLATE_CLEAR_PIPE() Pipe_ClearOUT()
- #define TEMPLATE_BUFFER_OFFSET(Length) 0
- #define TEMPLATE_BUFFER_MOVE(BufferPtr, Amount) DataStream += Amount
- #define TEMPLATE_TRANSFER_BYTE(BufferPtr) Pipe_Write_8(*BufferPtr)
- #include "Template/Template_Pipe_RW.c"
-
- #define TEMPLATE_FUNC_NAME Pipe_Write_Stream_BE
- #define TEMPLATE_BUFFER_TYPE const void*
- #define TEMPLATE_TOKEN PIPE_TOKEN_OUT
- #define TEMPLATE_CLEAR_PIPE() Pipe_ClearOUT()
- #define TEMPLATE_BUFFER_OFFSET(Length) (Length - 1)
- #define TEMPLATE_BUFFER_MOVE(BufferPtr, Amount) DataStream -= Amount
- #define TEMPLATE_TRANSFER_BYTE(BufferPtr) Pipe_Write_8(*BufferPtr)
- #include "Template/Template_Pipe_RW.c"
-
- #define TEMPLATE_FUNC_NAME Pipe_Read_Stream_LE
- #define TEMPLATE_BUFFER_TYPE void*
- #define TEMPLATE_TOKEN PIPE_TOKEN_IN
- #define TEMPLATE_CLEAR_PIPE() Pipe_ClearIN()
- #define TEMPLATE_BUFFER_OFFSET(Length) 0
- #define TEMPLATE_BUFFER_MOVE(BufferPtr, Amount) DataStream += Amount
- #define TEMPLATE_TRANSFER_BYTE(BufferPtr) *BufferPtr = Pipe_Read_8()
- #include "Template/Template_Pipe_RW.c"
-
- #define TEMPLATE_FUNC_NAME Pipe_Read_Stream_BE
- #define TEMPLATE_BUFFER_TYPE void*
- #define TEMPLATE_TOKEN PIPE_TOKEN_IN
- #define TEMPLATE_CLEAR_PIPE() Pipe_ClearIN()
- #define TEMPLATE_BUFFER_OFFSET(Length) (Length - 1)
- #define TEMPLATE_BUFFER_MOVE(BufferPtr, Amount) DataStream -= Amount
- #define TEMPLATE_TRANSFER_BYTE(BufferPtr) *BufferPtr = Pipe_Read_8()
- #include "Template/Template_Pipe_RW.c"
-
- #endif
-
- #endif
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