Add in a basic USART driver and echo test task.
Richard Barry
15 years ago
parent
4ab0313273
commit
28b5ea32a4
@ -1,214 +0,0 @@
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/*
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FreeRTOS V6.0.5 - Copyright (C) 2010 Real Time Engineers Ltd.
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***************************************************************************
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* *
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* If you are: *
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* *
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* + New to FreeRTOS, *
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* + Wanting to learn FreeRTOS or multitasking in general quickly *
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* + Looking for basic training, *
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* + Wanting to improve your FreeRTOS skills and productivity *
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* *
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* then take a look at the FreeRTOS eBook *
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* *
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* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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* http://www.FreeRTOS.org/Documentation *
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* *
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* A pdf reference manual is also available. Both are usually delivered *
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* to your inbox within 20 minutes to two hours when purchased between 8am *
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* and 8pm GMT (although please allow up to 24 hours in case of *
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* exceptional circumstances). Thank you for your support! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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***NOTE*** The exception to the GPL is included to allow you to distribute
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a combined work that includes FreeRTOS without being obliged to provide the
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source code for proprietary components outside of the FreeRTOS kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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||||
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details. You should have received a copy of the GNU General Public
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License and the FreeRTOS license exception along with FreeRTOS; if not it
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can be viewed here: http://www.freertos.org/a00114.html and also obtained
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by writing to Richard Barry, contact details for whom are available on the
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FreeRTOS WEB site.
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1 tab == 4 spaces!
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http://www.FreeRTOS.org - Documentation, latest information, license and
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contact details.
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||||
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http://www.SafeRTOS.com - A version that is certified for use in safety
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critical systems.
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http://www.OpenRTOS.com - Commercial support, development, porting,
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licensing and training services.
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*/
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#include <string.h>
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#include "FreeRTOS.h"
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#include "CircularBuffer.h"
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/*-----------------------------------------------------------*/
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/* See the header file for function information. */
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void vInitialiseCircularBuffer( xCircularBuffer *pxBuffer,
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unsigned char *pucDataBuffer,
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unsigned long ulBufferSizeInBytes,
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unsigned long ulDataSizeInBytes,
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void *pvTag
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)
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{
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pxBuffer->pucDataBuffer = pucDataBuffer;
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pxBuffer->ulBufferSizeInBytes = ulBufferSizeInBytes;
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pxBuffer->pucNextByteToRead = pucDataBuffer;
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pxBuffer->pucNextByteToWrite = pucDataBuffer;
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pxBuffer->ulDataSizeInBytes = ulDataSizeInBytes;
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pxBuffer->pvTag = pvTag;
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}
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/*-----------------------------------------------------------*/
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/* See the header file for function information. */
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unsigned long ulBytesInCircularBuffer( const xCircularBuffer * const pxBuffer )
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{
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unsigned char *pucNextByteToWrite;
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unsigned long ulReturn;
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if( pxBuffer->pvTag != NULL )
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{
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/* Locate the position that the DMA will next write to. */
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pucNextByteToWrite = ( unsigned char * ) *( ( unsigned long * ) pxBuffer->pvTag );
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}
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else
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{
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/* Locate the position the application will next write to. */
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pucNextByteToWrite = pxBuffer->pucNextByteToWrite;
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}
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/* Has the write pointer wrapped back to the start of the buffer
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compared to our read pointer? */
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if( ( unsigned long ) pucNextByteToWrite >= ( unsigned long ) pxBuffer->pucNextByteToRead )
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{
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/* The write pointer is still ahead of us in the buffer. The amount of
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data available is simple the gap between the two pointers. */
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ulReturn = ( unsigned long ) pucNextByteToWrite - ( unsigned long ) pxBuffer->pucNextByteToRead;
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}
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else
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{
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/* The write pointer has wrapped back to the start. The amount of data
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available is equal to the data between the read pointer and the end of
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the buffer...*/
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ulReturn = ( unsigned long ) &( pxBuffer->pucDataBuffer[ pxBuffer->ulBufferSizeInBytes ] ) - ( unsigned long ) pxBuffer->pucNextByteToRead;
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/*... plus the data between the start of the buffer and the write
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pointer. */
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ulReturn += ( unsigned long ) pucNextByteToWrite - ( unsigned long ) pxBuffer->pucDataBuffer;
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}
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return ulReturn;
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}
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/*-----------------------------------------------------------*/
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unsigned long ulCopyReceivedBytes( xCircularBuffer *pxBuffer, unsigned char * pucBuffer, unsigned long ulWantedBytes )
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{
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unsigned char *pucNextByteToWrite;
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unsigned long ulNumberOfBytesRead = 0, ulNumberOfBytesAvailable;
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if( pxBuffer->pvTag != NULL )
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{
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/* Locate the position that the DMA will next write to. */
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pucNextByteToWrite = ( unsigned char * ) *( ( unsigned long * ) pxBuffer->pvTag );
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}
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else
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{
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/* Locate the position that the application will next write to. */
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pucNextByteToWrite = pxBuffer->pucNextByteToWrite;
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}
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if( ( unsigned long ) pucNextByteToWrite >= ( unsigned long ) pxBuffer->pucNextByteToRead )
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{
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/* The write pointer has not wrapped around from our read pointer.
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Clip the number of bytes to read to the number available if the number
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available is less than that wanted. */
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ulNumberOfBytesAvailable = ( unsigned long ) pucNextByteToWrite - ( unsigned long ) ( pxBuffer->pucNextByteToRead );
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if( ulNumberOfBytesAvailable < ulWantedBytes )
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{
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ulWantedBytes = ulNumberOfBytesAvailable;
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}
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/* Copy the data from ulRxBuffer into the application buffer. */
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memcpy( pucBuffer, pxBuffer->pucNextByteToRead, ulWantedBytes );
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/* Move up our read buffer. */
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pxBuffer->pucNextByteToRead += ulWantedBytes;
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ulNumberOfBytesRead = ulWantedBytes;
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}
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else
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{
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/* The write pointer has wrapped around from our read pointer. Is there
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enough space from our read pointer to the end of the buffer without the
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read pointer also wrapping around? */
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ulNumberOfBytesAvailable = ( unsigned long ) &( pxBuffer->pucDataBuffer[ pxBuffer->ulBufferSizeInBytes ] ) - ( unsigned long ) pxBuffer->pucNextByteToRead;
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if( ulNumberOfBytesAvailable >= ulWantedBytes )
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{
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/* There is enough space from our current read pointer up to the end
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of the buffer to obtain the number of bytes requested. */
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memcpy( pucBuffer, pxBuffer->pucNextByteToRead, ulWantedBytes );
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/* Move up our read buffer. */
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pxBuffer->pucNextByteToRead += ulWantedBytes;
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ulNumberOfBytesRead = ulWantedBytes;
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}
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else
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{
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/* There is not enough space up to the end of the buffer to obtain
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the number of bytes requested. Copy up to the end of the buffer. */
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memcpy( pucBuffer, pxBuffer->pucNextByteToRead, ulNumberOfBytesAvailable );
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ulNumberOfBytesRead = ulNumberOfBytesAvailable;
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/* Then wrap back to the beginning of the buffer to attempt to
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read the remaining bytes. */
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pxBuffer->pucNextByteToRead = pxBuffer->pucDataBuffer;
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pucBuffer += ulNumberOfBytesAvailable;
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/* How many more bytes do we want to read? */
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ulWantedBytes -= ulNumberOfBytesAvailable;
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/* Clip the number of bytes we are going to read to the number
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available if this is less than the number we want. */
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ulNumberOfBytesAvailable = ( unsigned long ) pucNextByteToWrite - ( unsigned long ) pxBuffer->pucNextByteToRead;
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if( ulNumberOfBytesAvailable < ulWantedBytes )
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{
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ulWantedBytes = ulNumberOfBytesAvailable;
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}
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/* Copy these into the buffer. */
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memcpy( pucBuffer, pxBuffer->pucNextByteToRead, ulWantedBytes );
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/* Move up our read buffer. */
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pxBuffer->pucNextByteToRead += ulWantedBytes;
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ulNumberOfBytesRead += ulWantedBytes;
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}
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}
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/* Check we have not moved our read pointer off the end of the buffer. */
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if( ( unsigned long ) pxBuffer->pucNextByteToRead >= ( unsigned long ) &( pxBuffer->pucDataBuffer[ pxBuffer->ulBufferSizeInBytes ] ) )
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{
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pxBuffer->pucNextByteToRead = pxBuffer->pucDataBuffer;
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}
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/* Return the number of bytes read. */
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return ulNumberOfBytesRead;
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}
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@ -1,115 +0,0 @@
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/*
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FreeRTOS V6.0.5 - Copyright (C) 2010 Real Time Engineers Ltd.
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***************************************************************************
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* *
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* If you are: *
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* *
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* + New to FreeRTOS, *
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* + Wanting to learn FreeRTOS or multitasking in general quickly *
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||||
* + Looking for basic training, *
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||||
* + Wanting to improve your FreeRTOS skills and productivity *
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||||
* *
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* then take a look at the FreeRTOS eBook *
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* *
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* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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* http://www.FreeRTOS.org/Documentation *
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* *
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* A pdf reference manual is also available. Both are usually delivered *
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||||
* to your inbox within 20 minutes to two hours when purchased between 8am *
|
||||
* and 8pm GMT (although please allow up to 24 hours in case of *
|
||||
* exceptional circumstances). Thank you for your support! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
|
||||
***NOTE*** The exception to the GPL is included to allow you to distribute
|
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a combined work that includes FreeRTOS without being obliged to provide the
|
||||
source code for proprietary components outside of the FreeRTOS kernel.
|
||||
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
|
||||
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
more details. You should have received a copy of the GNU General Public
|
||||
License and the FreeRTOS license exception along with FreeRTOS; if not it
|
||||
can be viewed here: http://www.freertos.org/a00114.html and also obtained
|
||||
by writing to Richard Barry, contact details for whom are available on the
|
||||
FreeRTOS WEB site.
|
||||
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1 tab == 4 spaces!
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http://www.FreeRTOS.org - Documentation, latest information, license and
|
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contact details.
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||||
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||||
http://www.SafeRTOS.com - A version that is certified for use in safety
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critical systems.
|
||||
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http://www.OpenRTOS.com - Commercial support, development, porting,
|
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licensing and training services.
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*/
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#ifndef CIRCULAR_BUFFER_H
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#define CIRCULAR_BUFFER_H
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/* Structure that holds the state of the circular buffer. */
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typedef struct
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{
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unsigned char *pucDataBuffer;
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unsigned long ulBufferSizeInBytes;
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unsigned char *pucNextByteToRead;
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unsigned char *pucNextByteToWrite;
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unsigned long ulDataSizeInBytes;
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void *pvTag;
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} xCircularBuffer;
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/*
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* Setup a circular buffer ready for use.
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*
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* pxBuffer : The xCicularBuffer structure being initialised.
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*
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* pucDataBuffer : The buffer to be used by the xCicularBuffer object.
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*
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* ulBufferSizeInBytes : The dimention of pucDataBuffer in bytes.
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*
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* ulDataSizeInBytes : The size of the data that is to be stored in the
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* circular buffer. For example, 4 if the buffer is used to hold
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* unsigned longs, 1 if the buffer is used to hold chars.
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*
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* pvTag : Can be used for anything, although normally used in conjunction with
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* a DMA register.
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*/
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void vInitialiseCircularBuffer( xCircularBuffer *pxBuffer,
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unsigned char *pucDataBuffer,
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unsigned long ulBufferSizeInBytes,
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unsigned long ulDataSizeInBytes,
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void *pvTag
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);
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/*
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* Returns the number of bytes that are currently available within the
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* buffer.
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*/
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unsigned long ulBytesInCircularBuffer( const xCircularBuffer * const pxBuffer );
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/*
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* Obtain bytes from the circular buffer. Data may have been placed in
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* the circular buffer by a DMA transfer or simply written to the buffer by
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* the application code.
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*
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* pxBuffer : The circular buffer from which data is to be read.
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*
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* pucBuffer : The buffer into which the received bytes should be copied.
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*
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* ulWantedBytes : The number of bytes we are going to attempt to receive
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* from the circular buffer.
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*
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* return : The actual number of bytes received from the circular buffer.
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* This might be less than the number of bytes we attempted to receive.
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*/
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unsigned long ulCopyReceivedBytes( xCircularBuffer *pxBuffer, unsigned char * pucBuffer, unsigned long ulWantedBytes );
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#endif
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@ -0,0 +1,75 @@
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/******************** (C) COPYRIGHT 2009 STMicroelectronics ********************
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* File Name : spi_flash.h
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* Author : MCD Application Team
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* Version : V2.0.0
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* Date : 04/27/2009
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* Description : Header for spi_flash.c file.
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********************************************************************************
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
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* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
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* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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/* Define to prevent recursive inclusion -------------------------------------*/
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#ifndef __SPI_FLASH_H
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#define __SPI_FLASH_H
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f10x.h"
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#include "stm32f10x_spi.h"
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#include "stm32f10x_gpio.h"
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#include "stm32f10x_rcc.h"
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#define uint32_t unsigned long
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#define uint8_t unsigned char
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#define uint16_t unsigned short
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/* Exported types ------------------------------------------------------------*/
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/* Exported constants --------------------------------------------------------*/
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/* Uncomment the line corresponding to the STMicroelectronics evaluation board
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used to run the example */
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#if !defined (USE_STM3210B_EVAL) && !defined (USE_STM3210E_EVAL)
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//#define USE_STM3210B_EVAL
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#define USE_STM3210E_EVAL
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#endif
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#ifdef USE_STM3210B_EVAL
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#define GPIO_CS GPIOA
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#define RCC_APB2Periph_GPIO_CS RCC_APB2Periph_GPIOA
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#define GPIO_Pin_CS GPIO_Pin_4
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#else /* USE_STM3210E_EVAL */
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#define GPIO_CS GPIOB
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#define RCC_APB2Periph_GPIO_CS RCC_APB2Periph_GPIOB
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#define GPIO_Pin_CS GPIO_Pin_2
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#endif
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/* Exported macro ------------------------------------------------------------*/
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/* Select SPI FLASH: Chip Select pin low */
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#define SPI_FLASH_CS_LOW() __asm volatile( "NOP" );__asm volatile( "NOP" );__asm volatile( "NOP" );__asm volatile( "NOP" );GPIO_ResetBits(GPIO_CS, GPIO_Pin_CS);__asm volatile( "NOP" );__asm volatile( "NOP" );__asm volatile( "NOP" );__asm volatile( "NOP" )
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/* Deselect SPI FLASH: Chip Select pin high */
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#define SPI_FLASH_CS_HIGH() __asm volatile( "NOP" );__asm volatile( "NOP" );__asm volatile( "NOP" );__asm volatile( "NOP" );GPIO_SetBits(GPIO_CS, GPIO_Pin_CS);__asm volatile( "NOP" );__asm volatile( "NOP" );__asm volatile( "NOP" );__asm volatile( "NOP" )
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/* Exported functions ------------------------------------------------------- */
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/*----- High layer function -----*/
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void SPI_FLASH_Init(void);
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void SPI_FLASH_SectorErase(uint32_t SectorAddr);
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void SPI_FLASH_BulkErase(void);
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void SPI_FLASH_PageWrite(uint8_t* pBuffer, uint32_t WriteAddr, uint16_t NumByteToWrite);
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void SPI_FLASH_BufferWrite(uint8_t* pBuffer, uint32_t WriteAddr, uint16_t NumByteToWrite);
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void SPI_FLASH_BufferRead(uint8_t* pBuffer, uint32_t ReadAddr, uint16_t NumByteToRead);
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uint32_t SPI_FLASH_ReadID(void);
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void SPI_FLASH_StartReadSequence(uint32_t ReadAddr);
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/*----- Low layer function -----*/
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uint8_t SPI_FLASH_ReadByte(void);
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uint8_t SPI_FLASH_SendByte(uint8_t byte);
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uint16_t SPI_FLASH_SendHalfWord(uint16_t HalfWord);
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void SPI_FLASH_WriteEnable(void);
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void SPI_FLASH_WaitForWriteEnd(void);
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#endif /* __SPI_FLASH_H */
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/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
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