diff options
Diffstat (limited to 'LUFA/Drivers/USB/Core/UC3/PipeStream_UC3.c')
| -rw-r--r-- | LUFA/Drivers/USB/Core/UC3/PipeStream_UC3.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/LUFA/Drivers/USB/Core/UC3/PipeStream_UC3.c b/LUFA/Drivers/USB/Core/UC3/PipeStream_UC3.c new file mode 100644 index 0000000000..27426ada0b --- /dev/null +++ b/LUFA/Drivers/USB/Core/UC3/PipeStream_UC3.c @@ -0,0 +1,166 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2017. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2017 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 |