Add svn:eol-style property to source files, so that the line endings are correctly converted to the target system's native end of line style.
This commit is contained in:
Dean Camera
parent
e331b531c6
commit
071e02c6b6
839 changed files with 274562 additions and 274562 deletions
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@ -1,120 +1,120 @@
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2010.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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||||
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.
|
||||
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||||
The author disclaim all warranties with regard to this
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||||
software, including all implied warranties of merchantability
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||||
and fitness. In no event shall the author be liable for any
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||||
special, indirect or consequential damages or any damages
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||||
whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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#include "RingBuff.h"
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void Buffer_Initialize(RingBuff_t* const Buffer)
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{
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BUFF_ATOMIC_BLOCK
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{
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Buffer->InPtr = (RingBuff_Data_t*)&Buffer->Buffer;
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Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer;
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Buffer->Elements = 0;
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}
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}
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void Buffer_StoreElement(RingBuff_t* const Buffer, RingBuff_Data_t Data)
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{
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BUFF_ATOMIC_BLOCK
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{
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#if defined(BUFF_DROPOLD)
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if (Buffer->Elements == BUFF_LENGTH)
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{
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Buffer->OutPtr++;
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if (Buffer->OutPtr == &Buffer->Buffer[BUFF_LENGTH])
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Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer;
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}
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else
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{
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Buffer->Elements++;
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}
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#elif defined(BUFF_DROPNEW)
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if (Buffer->Elements == BUFF_LENGTH)
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return;
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Buffer->Elements++;
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#elif defined(BUFF_NODROPCHECK)
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Buffer->Elements++;
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#endif
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*(Buffer->InPtr) = Data;
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Buffer->InPtr++;
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if (Buffer->InPtr == &Buffer->Buffer[BUFF_LENGTH])
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Buffer->InPtr = (RingBuff_Data_t*)&Buffer->Buffer;
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}
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}
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RingBuff_Data_t Buffer_GetElement(RingBuff_t* const Buffer)
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{
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RingBuff_Data_t BuffData;
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BUFF_ATOMIC_BLOCK
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{
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#if defined(BUFF_EMPTYRETURNSZERO)
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if (!(Buffer->Elements))
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return 0;
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#elif !defined(BUFF_NOEMPTYCHECK)
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#error No empty buffer check behavior specified.
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#endif
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BuffData = *(Buffer->OutPtr);
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Buffer->OutPtr++;
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Buffer->Elements--;
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if (Buffer->OutPtr == &Buffer->Buffer[BUFF_LENGTH])
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Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer;
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}
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return BuffData;
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}
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#if defined(BUFF_USEPEEK)
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RingBuff_Data_t Buffer_PeekElement(const RingBuff_t* const Buffer)
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{
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RingBuff_Data_t BuffData;
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BUFF_ATOMIC_BLOCK
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{
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#if defined(BUFF_EMPTYRETURNSZERO)
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if (!(Buffer->Elements))
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return 0;
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#elif !defined(BUFF_NOEMPTYCHECK)
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#error No empty buffer check behavior specified.
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#endif
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BuffData = *(Buffer->OutPtr);
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}
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return BuffData;
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}
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#endif
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2010.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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||||
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.
|
||||
|
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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||||
and fitness. In no event shall the author be liable for any
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||||
special, indirect or consequential damages or any damages
|
||||
whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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#include "RingBuff.h"
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void Buffer_Initialize(RingBuff_t* const Buffer)
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{
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BUFF_ATOMIC_BLOCK
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{
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Buffer->InPtr = (RingBuff_Data_t*)&Buffer->Buffer;
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Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer;
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Buffer->Elements = 0;
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}
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}
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void Buffer_StoreElement(RingBuff_t* const Buffer, RingBuff_Data_t Data)
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{
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BUFF_ATOMIC_BLOCK
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{
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#if defined(BUFF_DROPOLD)
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if (Buffer->Elements == BUFF_LENGTH)
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{
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Buffer->OutPtr++;
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if (Buffer->OutPtr == &Buffer->Buffer[BUFF_LENGTH])
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Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer;
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}
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else
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{
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Buffer->Elements++;
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}
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#elif defined(BUFF_DROPNEW)
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if (Buffer->Elements == BUFF_LENGTH)
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return;
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Buffer->Elements++;
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#elif defined(BUFF_NODROPCHECK)
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Buffer->Elements++;
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#endif
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*(Buffer->InPtr) = Data;
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Buffer->InPtr++;
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if (Buffer->InPtr == &Buffer->Buffer[BUFF_LENGTH])
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Buffer->InPtr = (RingBuff_Data_t*)&Buffer->Buffer;
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}
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}
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RingBuff_Data_t Buffer_GetElement(RingBuff_t* const Buffer)
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{
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RingBuff_Data_t BuffData;
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BUFF_ATOMIC_BLOCK
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{
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#if defined(BUFF_EMPTYRETURNSZERO)
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if (!(Buffer->Elements))
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return 0;
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#elif !defined(BUFF_NOEMPTYCHECK)
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#error No empty buffer check behavior specified.
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#endif
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BuffData = *(Buffer->OutPtr);
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Buffer->OutPtr++;
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Buffer->Elements--;
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if (Buffer->OutPtr == &Buffer->Buffer[BUFF_LENGTH])
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Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer;
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}
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return BuffData;
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}
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#if defined(BUFF_USEPEEK)
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RingBuff_Data_t Buffer_PeekElement(const RingBuff_t* const Buffer)
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{
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RingBuff_Data_t BuffData;
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BUFF_ATOMIC_BLOCK
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{
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#if defined(BUFF_EMPTYRETURNSZERO)
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if (!(Buffer->Elements))
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return 0;
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#elif !defined(BUFF_NOEMPTYCHECK)
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#error No empty buffer check behavior specified.
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#endif
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BuffData = *(Buffer->OutPtr);
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}
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return BuffData;
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}
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#endif
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@ -1,116 +1,116 @@
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2010.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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||||
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 disclaim all warranties with regard to this
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||||
software, including all implied warranties of merchantability
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||||
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
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||||
in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/* Buffer Configuration: */
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/* Buffer length - select static size of created ring buffers: */
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#define BUFF_STATICSIZE 128 // Set to the static ring buffer size for all ring buffers (place size after define)
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/* Volatile mode - uncomment to make buffers volatile, for use in ISRs, etc: */
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#define BUFF_VOLATILE // Uncomment to cause all ring buffers to become volatile (and atomic if multi-byte) in access
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/* Drop mode - select behaviour when Buffer_StoreElement called on a full buffer: */
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#define BUFF_DROPOLD // Uncomment to cause full ring buffers to drop the oldest character to make space when full
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// #define BUFF_DROPNEW // Uncomment to cause full ring buffers to drop the new character when full
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// #define BUFF_NODROPCHECK // Uncomment to ignore full ring buffer checks - checking left to user!
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/* Underflow behaviour - select behaviour when Buffer_GetElement is called with an empty ring buffer: */
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//#define BUFF_EMPTYRETURNSZERO // Uncomment to return 0 when an empty ring buffer is read
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#define BUFF_NOEMPTYCHECK // Uncomment to disable checking of empty ring buffers - checking left to user!
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/* Buffer storage type - set the datatype for the stored data */
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#define BUFF_DATATYPE uint8_t // Change to the data type that is going to be stored into the buffer
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/* Peek routine - uncomment to include the peek routine (fetches next byte without removing it from the buffer */
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//#define BUFF_USEPEEK
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#ifndef _RINGBUFF_H_
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#define _RINGBUFF_H_
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/* Includes: */
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/atomic.h>
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#include <limits.h>
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#include <LUFA/Common/Common.h>
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/* Defines and checks: */
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#if defined(BUFF_STATICSIZE)
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#define BUFF_LENGTH BUFF_STATICSIZE
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#else
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#error No buffer length specified!
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#endif
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#if !(defined(BUFF_DROPOLD) || defined(BUFF_DROPNEW) || defined(BUFF_NODROPCHECK))
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#error No buffer drop mode specified.
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#endif
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#if !defined(BUFF_DATATYPE)
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#error Ringbuffer storage data type not specified.
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#endif
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#if defined(BUFF_VOLATILE)
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#define BUFF_MODE volatile
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#define BUFF_ATOMIC_BLOCK ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
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#else
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#define BUFF_MODE
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#define BUFF_ATOMIC_BLOCK
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#endif
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#if (BUFF_STATICSIZE > LONG_MAX)
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#define RingBuff_Elements_t uint64_t
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#elif (BUFF_STATICSIZE > INT_MAX)
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#define RingBuff_Elements_t uint32_t
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#elif (BUFF_STATICSIZE > CHAR_MAX)
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#define RingBuff_Elements_t uint16_t
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#else
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#define RingBuff_Elements_t uint8_t
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#endif
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/* Type Defines: */
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typedef BUFF_DATATYPE RingBuff_Data_t;
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typedef BUFF_MODE struct
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{
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RingBuff_Data_t Buffer[BUFF_LENGTH];
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RingBuff_Data_t* InPtr;
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RingBuff_Data_t* OutPtr;
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RingBuff_Elements_t Elements;
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} RingBuff_t;
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/* Function Prototypes: */
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void Buffer_Initialize(RingBuff_t* const Buff);
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void Buffer_StoreElement(RingBuff_t* const Buffer, RingBuff_Data_t Data);
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RingBuff_Data_t Buffer_GetElement(RingBuff_t* const Buffer);
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#if defined(BUFF_USEPEEK)
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RingBuff_Data_t Buffer_PeekElement(const RingBuff_t* const Buffer);
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#endif
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#endif
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2010.
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||||
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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||||
Copyright 2010 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 disclaim 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.
|
||||
*/
|
||||
|
||||
/* Buffer Configuration: */
|
||||
/* Buffer length - select static size of created ring buffers: */
|
||||
#define BUFF_STATICSIZE 128 // Set to the static ring buffer size for all ring buffers (place size after define)
|
||||
|
||||
/* Volatile mode - uncomment to make buffers volatile, for use in ISRs, etc: */
|
||||
#define BUFF_VOLATILE // Uncomment to cause all ring buffers to become volatile (and atomic if multi-byte) in access
|
||||
|
||||
/* Drop mode - select behaviour when Buffer_StoreElement called on a full buffer: */
|
||||
#define BUFF_DROPOLD // Uncomment to cause full ring buffers to drop the oldest character to make space when full
|
||||
// #define BUFF_DROPNEW // Uncomment to cause full ring buffers to drop the new character when full
|
||||
// #define BUFF_NODROPCHECK // Uncomment to ignore full ring buffer checks - checking left to user!
|
||||
|
||||
/* Underflow behaviour - select behaviour when Buffer_GetElement is called with an empty ring buffer: */
|
||||
//#define BUFF_EMPTYRETURNSZERO // Uncomment to return 0 when an empty ring buffer is read
|
||||
#define BUFF_NOEMPTYCHECK // Uncomment to disable checking of empty ring buffers - checking left to user!
|
||||
|
||||
/* Buffer storage type - set the datatype for the stored data */
|
||||
#define BUFF_DATATYPE uint8_t // Change to the data type that is going to be stored into the buffer
|
||||
|
||||
/* Peek routine - uncomment to include the peek routine (fetches next byte without removing it from the buffer */
|
||||
//#define BUFF_USEPEEK
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||||
|
||||
#ifndef _RINGBUFF_H_
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||||
#define _RINGBUFF_H_
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|
||||
/* Includes: */
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||||
#include <avr/io.h>
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#include <avr/interrupt.h>
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||||
#include <util/atomic.h>
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||||
#include <limits.h>
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||||
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||||
#include <LUFA/Common/Common.h>
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||||
/* Defines and checks: */
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||||
#if defined(BUFF_STATICSIZE)
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||||
#define BUFF_LENGTH BUFF_STATICSIZE
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||||
#else
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||||
#error No buffer length specified!
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||||
#endif
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||||
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||||
#if !(defined(BUFF_DROPOLD) || defined(BUFF_DROPNEW) || defined(BUFF_NODROPCHECK))
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||||
#error No buffer drop mode specified.
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||||
#endif
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||||
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||||
#if !defined(BUFF_DATATYPE)
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||||
#error Ringbuffer storage data type not specified.
|
||||
#endif
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||||
|
||||
#if defined(BUFF_VOLATILE)
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||||
#define BUFF_MODE volatile
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||||
#define BUFF_ATOMIC_BLOCK ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
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||||
#else
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||||
#define BUFF_MODE
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||||
#define BUFF_ATOMIC_BLOCK
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||||
#endif
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||||
|
||||
#if (BUFF_STATICSIZE > LONG_MAX)
|
||||
#define RingBuff_Elements_t uint64_t
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||||
#elif (BUFF_STATICSIZE > INT_MAX)
|
||||
#define RingBuff_Elements_t uint32_t
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||||
#elif (BUFF_STATICSIZE > CHAR_MAX)
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||||
#define RingBuff_Elements_t uint16_t
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||||
#else
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||||
#define RingBuff_Elements_t uint8_t
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||||
#endif
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||||
|
||||
/* Type Defines: */
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||||
typedef BUFF_DATATYPE RingBuff_Data_t;
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||||
|
||||
typedef BUFF_MODE struct
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||||
{
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||||
RingBuff_Data_t Buffer[BUFF_LENGTH];
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||||
RingBuff_Data_t* InPtr;
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||||
RingBuff_Data_t* OutPtr;
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||||
RingBuff_Elements_t Elements;
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||||
} RingBuff_t;
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||||
|
||||
/* Function Prototypes: */
|
||||
void Buffer_Initialize(RingBuff_t* const Buff);
|
||||
void Buffer_StoreElement(RingBuff_t* const Buffer, RingBuff_Data_t Data);
|
||||
RingBuff_Data_t Buffer_GetElement(RingBuff_t* const Buffer);
|
||||
#if defined(BUFF_USEPEEK)
|
||||
RingBuff_Data_t Buffer_PeekElement(const RingBuff_t* const Buffer);
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||||
#endif
|
||||
|
||||
#endif
|
||||
|
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|||
|
|
@ -1,143 +1,143 @@
|
|||
/*
|
||||
LUFA Library
|
||||
Copyright (C) Dean Camera, 2010.
|
||||
|
||||
dean [at] fourwalledcubicle [dot] com
|
||||
www.fourwalledcubicle.com
|
||||
*/
|
||||
|
||||
/*
|
||||
Copyright 2010 David Prentice (david.prentice [at] farming [dot] uk)
|
||||
Copyright 2010 Peter Danneger
|
||||
Copyright 2010 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 disclaim 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 "SoftUART.h"
|
||||
|
||||
volatile uint8_t srx_done, stx_count;
|
||||
volatile uint8_t srx_data, srx_mask, srx_tmp, stx_data;
|
||||
|
||||
uint8_t SoftUART_IsReady(void)
|
||||
{
|
||||
return !(stx_count);
|
||||
}
|
||||
|
||||
uint8_t SoftUART_TxByte(uint8_t Byte)
|
||||
{
|
||||
while (stx_count);
|
||||
|
||||
stx_data = ~Byte;
|
||||
stx_count = 10;
|
||||
|
||||
return Byte;
|
||||
}
|
||||
|
||||
uint8_t SoftUART_IsReceived(void)
|
||||
{
|
||||
return srx_done;
|
||||
}
|
||||
|
||||
uint8_t SoftUART_RxByte(void)
|
||||
{
|
||||
while (!(srx_done));
|
||||
|
||||
srx_done = 0;
|
||||
|
||||
return srx_data;
|
||||
}
|
||||
|
||||
void SoftUART_Init(void)
|
||||
{
|
||||
OCR2B = TCNT2 + 1; // force first compare
|
||||
TCCR2A = (1 << COM2B1) | (1 << COM2B0); // T1 mode 0
|
||||
TCCR2B = (1 << FOC2B) | (1 << CS21); // CLK/8, T1 mode 0
|
||||
TIMSK2 = (1 << OCIE2B); // enable tx and wait for start
|
||||
EICRA = (1 << ISC01); // -ve edge
|
||||
EIMSK = (1 << INT0); // enable INT0 interrupt
|
||||
|
||||
stx_count = 0; // nothing to send
|
||||
srx_done = 0; // nothing received
|
||||
STXPORT |= 1 << STX; // TX output
|
||||
STXDDR |= 1 << STX; // TX output
|
||||
SRXPORT |= (1 << SRX); // pullup on INT0
|
||||
}
|
||||
|
||||
/* ISR to detect the start of a bit being sent from the transmitter. */
|
||||
ISR(INT0_vect)
|
||||
{
|
||||
OCR2A = TCNT2 + (BIT_TIME / 8 * 3 / 2); // scan 1.5 bits after start
|
||||
|
||||
srx_tmp = 0; // clear bit storage
|
||||
srx_mask = 1; // bit mask
|
||||
|
||||
TIFR2 = (1 << OCF2A); // clear pending interrupt
|
||||
|
||||
if (!(SRXPIN & (1 << SRX))) // still low
|
||||
{
|
||||
TIMSK2 = (1 << OCIE2A) | (1 << OCIE2B); // wait for first bit
|
||||
EIMSK &= ~(1 << INT0);
|
||||
}
|
||||
}
|
||||
|
||||
/* ISR to manage the reception of bits to the transmitter. */
|
||||
ISR(TIMER2_COMPA_vect)
|
||||
{
|
||||
if (srx_mask)
|
||||
{
|
||||
if (SRXPIN & (1 << SRX))
|
||||
srx_tmp |= srx_mask;
|
||||
|
||||
srx_mask <<= 1;
|
||||
|
||||
OCR2A += BIT_TIME / 8; // next bit slice
|
||||
}
|
||||
else
|
||||
{
|
||||
srx_done = 1; // mark rx data valid
|
||||
srx_data = srx_tmp; // store rx data
|
||||
TIMSK2 = (1 << OCIE2B); // enable tx and wait for start
|
||||
EIMSK |= (1 << INT0); // enable START irq
|
||||
EIFR = (1 << INTF0); // clear any pending
|
||||
}
|
||||
}
|
||||
|
||||
/* ISR to manage the transmission of bits to the receiver. */
|
||||
ISR(TIMER2_COMPB_vect)
|
||||
{
|
||||
OCR2B += BIT_TIME / 8; // next bit slice
|
||||
|
||||
if (stx_count)
|
||||
{
|
||||
if (--stx_count != 9) // no start bit
|
||||
{
|
||||
if (!(stx_data & 1)) // test inverted data
|
||||
TCCR2A = (1 << COM2B1) | (1 << COM2B0);
|
||||
else
|
||||
TCCR2A = (1 << COM2B1);
|
||||
|
||||
stx_data >>= 1; // shift zero in from left
|
||||
}
|
||||
else
|
||||
{
|
||||
TCCR2A = (1 << COM2B1); // START bit
|
||||
}
|
||||
}
|
||||
}
|
||||
/*
|
||||
LUFA Library
|
||||
Copyright (C) Dean Camera, 2010.
|
||||
|
||||
dean [at] fourwalledcubicle [dot] com
|
||||
www.fourwalledcubicle.com
|
||||
*/
|
||||
|
||||
/*
|
||||
Copyright 2010 David Prentice (david.prentice [at] farming [dot] uk)
|
||||
Copyright 2010 Peter Danneger
|
||||
Copyright 2010 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 disclaim 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 "SoftUART.h"
|
||||
|
||||
volatile uint8_t srx_done, stx_count;
|
||||
volatile uint8_t srx_data, srx_mask, srx_tmp, stx_data;
|
||||
|
||||
uint8_t SoftUART_IsReady(void)
|
||||
{
|
||||
return !(stx_count);
|
||||
}
|
||||
|
||||
uint8_t SoftUART_TxByte(uint8_t Byte)
|
||||
{
|
||||
while (stx_count);
|
||||
|
||||
stx_data = ~Byte;
|
||||
stx_count = 10;
|
||||
|
||||
return Byte;
|
||||
}
|
||||
|
||||
uint8_t SoftUART_IsReceived(void)
|
||||
{
|
||||
return srx_done;
|
||||
}
|
||||
|
||||
uint8_t SoftUART_RxByte(void)
|
||||
{
|
||||
while (!(srx_done));
|
||||
|
||||
srx_done = 0;
|
||||
|
||||
return srx_data;
|
||||
}
|
||||
|
||||
void SoftUART_Init(void)
|
||||
{
|
||||
OCR2B = TCNT2 + 1; // force first compare
|
||||
TCCR2A = (1 << COM2B1) | (1 << COM2B0); // T1 mode 0
|
||||
TCCR2B = (1 << FOC2B) | (1 << CS21); // CLK/8, T1 mode 0
|
||||
TIMSK2 = (1 << OCIE2B); // enable tx and wait for start
|
||||
EICRA = (1 << ISC01); // -ve edge
|
||||
EIMSK = (1 << INT0); // enable INT0 interrupt
|
||||
|
||||
stx_count = 0; // nothing to send
|
||||
srx_done = 0; // nothing received
|
||||
STXPORT |= 1 << STX; // TX output
|
||||
STXDDR |= 1 << STX; // TX output
|
||||
SRXPORT |= (1 << SRX); // pullup on INT0
|
||||
}
|
||||
|
||||
/* ISR to detect the start of a bit being sent from the transmitter. */
|
||||
ISR(INT0_vect)
|
||||
{
|
||||
OCR2A = TCNT2 + (BIT_TIME / 8 * 3 / 2); // scan 1.5 bits after start
|
||||
|
||||
srx_tmp = 0; // clear bit storage
|
||||
srx_mask = 1; // bit mask
|
||||
|
||||
TIFR2 = (1 << OCF2A); // clear pending interrupt
|
||||
|
||||
if (!(SRXPIN & (1 << SRX))) // still low
|
||||
{
|
||||
TIMSK2 = (1 << OCIE2A) | (1 << OCIE2B); // wait for first bit
|
||||
EIMSK &= ~(1 << INT0);
|
||||
}
|
||||
}
|
||||
|
||||
/* ISR to manage the reception of bits to the transmitter. */
|
||||
ISR(TIMER2_COMPA_vect)
|
||||
{
|
||||
if (srx_mask)
|
||||
{
|
||||
if (SRXPIN & (1 << SRX))
|
||||
srx_tmp |= srx_mask;
|
||||
|
||||
srx_mask <<= 1;
|
||||
|
||||
OCR2A += BIT_TIME / 8; // next bit slice
|
||||
}
|
||||
else
|
||||
{
|
||||
srx_done = 1; // mark rx data valid
|
||||
srx_data = srx_tmp; // store rx data
|
||||
TIMSK2 = (1 << OCIE2B); // enable tx and wait for start
|
||||
EIMSK |= (1 << INT0); // enable START irq
|
||||
EIFR = (1 << INTF0); // clear any pending
|
||||
}
|
||||
}
|
||||
|
||||
/* ISR to manage the transmission of bits to the receiver. */
|
||||
ISR(TIMER2_COMPB_vect)
|
||||
{
|
||||
OCR2B += BIT_TIME / 8; // next bit slice
|
||||
|
||||
if (stx_count)
|
||||
{
|
||||
if (--stx_count != 9) // no start bit
|
||||
{
|
||||
if (!(stx_data & 1)) // test inverted data
|
||||
TCCR2A = (1 << COM2B1) | (1 << COM2B0);
|
||||
else
|
||||
TCCR2A = (1 << COM2B1);
|
||||
|
||||
stx_data >>= 1; // shift zero in from left
|
||||
}
|
||||
else
|
||||
{
|
||||
TCCR2A = (1 << COM2B1); // START bit
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,60 +1,60 @@
|
|||
/*
|
||||
LUFA Library
|
||||
Copyright (C) Dean Camera, 2010.
|
||||
|
||||
dean [at] fourwalledcubicle [dot] com
|
||||
www.fourwalledcubicle.com
|
||||
*/
|
||||
|
||||
/*
|
||||
Copyright 2010 David Prentice (david.prentice [at] farming [dot] uk)
|
||||
Copyright 2010 Peter Danneger
|
||||
Copyright 2010 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 disclaim 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.
|
||||
*/
|
||||
|
||||
#ifndef _SOFT_UART_
|
||||
#define _SOFT_UART_
|
||||
|
||||
/* Includes: */
|
||||
#include <avr/io.h>
|
||||
#include <avr/interrupt.h>
|
||||
#include "SoftUART.h"
|
||||
|
||||
/* Macros: */
|
||||
#define BAUD 9600
|
||||
#define BIT_TIME (uint16_t)((F_CPU + (BAUD / 2)) / BAUD)
|
||||
|
||||
#define SRX PD0
|
||||
#define SRXPIN PIND
|
||||
#define SRXPORT PORTD
|
||||
|
||||
#define STX PD1
|
||||
#define STXPORT PORTD
|
||||
#define STXDDR DDRD
|
||||
|
||||
/* Function Prototypes: */
|
||||
uint8_t SoftUART_IsReady(void);
|
||||
uint8_t SoftUART_TxByte(uint8_t c);
|
||||
uint8_t SoftUART_IsReceived(void);
|
||||
uint8_t SoftUART_RxByte(void);
|
||||
void SoftUART_Init(void);
|
||||
|
||||
/*
|
||||
LUFA Library
|
||||
Copyright (C) Dean Camera, 2010.
|
||||
|
||||
dean [at] fourwalledcubicle [dot] com
|
||||
www.fourwalledcubicle.com
|
||||
*/
|
||||
|
||||
/*
|
||||
Copyright 2010 David Prentice (david.prentice [at] farming [dot] uk)
|
||||
Copyright 2010 Peter Danneger
|
||||
Copyright 2010 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 disclaim 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.
|
||||
*/
|
||||
|
||||
#ifndef _SOFT_UART_
|
||||
#define _SOFT_UART_
|
||||
|
||||
/* Includes: */
|
||||
#include <avr/io.h>
|
||||
#include <avr/interrupt.h>
|
||||
#include "SoftUART.h"
|
||||
|
||||
/* Macros: */
|
||||
#define BAUD 9600
|
||||
#define BIT_TIME (uint16_t)((F_CPU + (BAUD / 2)) / BAUD)
|
||||
|
||||
#define SRX PD0
|
||||
#define SRXPIN PIND
|
||||
#define SRXPORT PORTD
|
||||
|
||||
#define STX PD1
|
||||
#define STXPORT PORTD
|
||||
#define STXDDR DDRD
|
||||
|
||||
/* Function Prototypes: */
|
||||
uint8_t SoftUART_IsReady(void);
|
||||
uint8_t SoftUART_TxByte(uint8_t c);
|
||||
uint8_t SoftUART_IsReceived(void);
|
||||
uint8_t SoftUART_RxByte(void);
|
||||
void SoftUART_Init(void);
|
||||
|
||||
#endif
|
||||
Loading…
Add table
Add a link
Reference in a new issue