FreeRTOS/Demo/CORTEX_A9_RZ_R7S72100_IAR_DS-5/Source/Full-Demo/File-system-demo.c - nest-detect/1.0.1/freertos - Git at Google

 /*
     FreeRTOS V8.0.1 - Copyright (C) 2014 Real Time Engineers Ltd.
     All rights reserved

     FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME.  PLEASE VISIT
     http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

     ***************************************************************************
      *                                                                       *
      *    FreeRTOS tutorial books are available in pdf and paperback.        *
      *    Complete, revised, and edited pdf reference manuals are also       *
      *    available.                                                         *
      *                                                                       *
      *    Purchasing FreeRTOS documentation will not only help you, by       *
      *    ensuring you get running as quickly as possible and with an        *
      *    in-depth knowledge of how to use FreeRTOS, it will also help       *
      *    the FreeRTOS project to continue with its mission of providing     *
      *    professional grade, cross platform, de facto standard solutions    *
      *    for microcontrollers - completely free of charge!                  *
      *                                                                       *
      *    >>> See http://www.FreeRTOS.org/Documentation for details. <<<     *
      *                                                                       *
      *    Thank you for using FreeRTOS, and thank you for your support!      *
      *                                                                       *
     ***************************************************************************


     This file is part of the FreeRTOS distribution.

     FreeRTOS is free software; you can redistribute it and/or modify it under
     the terms of the GNU General Public License (version 2) as published by the
     Free Software Foundation AND MODIFIED BY the FreeRTOS exception.

     >>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
     distribute 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 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 itcan be
     viewed here: http://www.freertos.org/a00114.html and also obtained by
     writing to Real Time Engineers Ltd., contact details for whom are available
     on the FreeRTOS WEB site.

     1 tab == 4 spaces!

     ***************************************************************************
      *                                                                       *
      *    Having a problem?  Start by reading the FAQ "My application does   *
      *    not run, what could be wrong?"                                     *
      *                                                                       *
      *    http://www.FreeRTOS.org/FAQHelp.html                               *
      *                                                                       *
     ***************************************************************************


     http://www.FreeRTOS.org - Documentation, books, training, latest versions,
     license and Real Time Engineers Ltd. contact details.

     http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
     including FreeRTOS+Trace - an indispensable productivity tool, and our new
     fully thread aware and reentrant UDP/IP stack.

     http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
     Integrity Systems, who sell the code with commercial support,
     indemnification and middleware, under the OpenRTOS brand.

     http://www.SafeRTOS.com - High Integrity Systems also provide a safety
     engineered and independently SIL3 certified version for use in safety and
     mission critical applications that require provable dependability.
 */

 /*******************************************************************************
  * See the URL in the comments within main.c for the location of the online
  * documentation.
  ******************************************************************************/

 /* Standard includes. */
 #include <stdio.h>
 #include <string.h>

 /* FreeRTOS includes. */
 #include "FreeRTOS.h"
 #include "task.h"

 /* File system includes. */
 #include "fat_sl.h"
 #include "api_mdriver_ram.h"

 /* 8.3 format, plus null terminator. */
 #define fsMAX_FILE_NAME_LEN				13

 /* The number of bytes read/written to the example files at a time. */
 #define fsRAM_BUFFER_SIZE 				200

 /* The number of bytes written to the file that uses f_putc() and f_getc(). */
 #define fsPUTC_FILE_SIZE				100

 /* The number of files created in root. */
 #define fsROOT_FILES					5

 /*-----------------------------------------------------------*/

 /*
  * Creates and verifies different files on the volume, demonstrating the use of
  * various different API functions.
  */
 void vCreateAndVerifySampleFiles( void );

 /*
  * Create a set of example files in the root directory of the volume using
  * f_write().
  */
 static void prvCreateDemoFilesUsing_f_write( void );

 /*
  * Use f_read() to read back and verify the files that were created by
  * prvCreateDemoFilesUsing_f_write().
  */
 static void prvVerifyDemoFileUsing_f_read( void );

 /*
  * Create an example file in a sub-directory using f_putc().
  */
 static void prvCreateDemoFileUsing_f_putc( void );

 /*
  * Use f_getc() to read back and verify the file that was created by
  * prvCreateDemoFileUsing_f_putc().
  */
 static void prvVerifyDemoFileUsing_f_getc( void );

 /*-----------------------------------------------------------*/

 /* A buffer used to both create content to write to disk, and read content back
 from a disk.  Note there is no mutual exclusion on this buffer. */
 static char cRAMBuffer[ fsRAM_BUFFER_SIZE ];

 /* Names of directories that are created. */
 static const char *pcRoot = "/", *pcDirectory1 = "SUB1", *pcDirectory2 = "SUB2", *pcFullPath = "/SUB1/SUB2";

 /*-----------------------------------------------------------*/

 void vCreateAndVerifySampleFiles( void )
 {
 unsigned char ucStatus;

 	/* First create the volume. */
 	ucStatus = f_initvolume( ram_initfunc );

 	/* It is expected that the volume is not formatted. */
 	if( ucStatus == F_ERR_NOTFORMATTED )
 	{
 		/* Format the created volume. */
 		ucStatus = f_format( F_FAT12_MEDIA );
 	}

 	if( ucStatus == F_NO_ERROR )
 	{
 		/* Create a set of files using f_write(). */
 		prvCreateDemoFilesUsing_f_write();

 		/* Read back and verify the files that were created using f_write(). */
 		prvVerifyDemoFileUsing_f_read();

 		/* Create sub directories two deep then create a file using putc. */
 		prvCreateDemoFileUsing_f_putc();

 		/* Read back and verify the file created by
 		prvCreateDemoFileUsing_f_putc(). */
 		prvVerifyDemoFileUsing_f_getc();
 	}
 }
 /*-----------------------------------------------------------*/

 static void prvCreateDemoFilesUsing_f_write( void )
 {
 portBASE_TYPE xFileNumber, xWriteNumber;
 char cFileName[ fsMAX_FILE_NAME_LEN ];
 long lItemsWritten;
 F_FILE *pxFile;

 	/* Create fsROOT_FILES files.  Each created file will be
 	( xFileNumber * fsRAM_BUFFER_SIZE ) bytes in length, and filled
 	with a different repeating character. */
 	for( xFileNumber = 1; xFileNumber <= fsROOT_FILES; xFileNumber++ )
 	{
 		/* Generate a file name. */
 		sprintf( cFileName, "root%03d.txt", xFileNumber );

 		/* Obtain the current working directory and print out the file name and
 		the	directory into which the file is being written. */
 		f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
 		printf( "Creating file %s in %s\r\n", cFileName, cRAMBuffer );

 		/* Open the file, creating the file if it does not already exist. */
 		pxFile = f_open( cFileName, "w" );
 		configASSERT( pxFile );

 		/* Fill the RAM buffer with data that will be written to the file.  This
 		is just a repeating ascii character that indicates the file number. */
 		memset( cRAMBuffer, ( int ) ( '0' + xFileNumber ), fsRAM_BUFFER_SIZE );

 		/* Write the RAM buffer to the opened file a number of times.  The
 		number of times the RAM buffer is written to the file depends on the
 		file number, so the length of each created file will be different. */
 		for( xWriteNumber = 0; xWriteNumber < xFileNumber; xWriteNumber++ )
 		{
 			lItemsWritten = f_write( cRAMBuffer, fsRAM_BUFFER_SIZE, 1, pxFile );
 			configASSERT( lItemsWritten == 1 );
 		}

 		/* Close the file so another file can be created. */
 		f_close( pxFile );
 	}
 }
 /*-----------------------------------------------------------*/

 static void prvVerifyDemoFileUsing_f_read( void )
 {
 portBASE_TYPE xFileNumber, xReadNumber;
 char cFileName[ fsMAX_FILE_NAME_LEN ];
 long lItemsRead, lChar;
 F_FILE *pxFile;

 	/* Read back the files that were created by
 	prvCreateDemoFilesUsing_f_write(). */
 	for( xFileNumber = 1; xFileNumber <= fsROOT_FILES; xFileNumber++ )
 	{
 		/* Generate the file name. */
 		sprintf( cFileName, "root%03d.txt", xFileNumber );

 		/* Obtain the current working directory and print out the file name and
 		the	directory from which the file is being read. */
 		f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
 		printf( "Reading file %s from %s\r\n", cFileName, cRAMBuffer );

 		/* Open the file for reading. */
 		pxFile = f_open( cFileName, "r" );
 		configASSERT( pxFile );

 		/* Read the file into the RAM buffer, checking the file contents are as
 		expected.  The size of the file depends on the file number. */
 		for( xReadNumber = 0; xReadNumber < xFileNumber; xReadNumber++ )
 		{
 			/* Start with the RAM buffer clear. */
 			memset( cRAMBuffer, 0x00, fsRAM_BUFFER_SIZE );

 			lItemsRead = f_read( cRAMBuffer, fsRAM_BUFFER_SIZE, 1, pxFile );
 			configASSERT( lItemsRead == 1 );

 			/* Check the RAM buffer is filled with the expected data.  Each
 			file contains a different repeating ascii character that indicates
 			the number of the file. */
 			for( lChar = 0; lChar < fsRAM_BUFFER_SIZE; lChar++ )
 			{
 				configASSERT( cRAMBuffer[ lChar ] == ( '0' + ( char ) xFileNumber ) );
 			}
 		}

 		/* Close the file. */
 		f_close( pxFile );
 	}
 }
 /*-----------------------------------------------------------*/

 static void prvCreateDemoFileUsing_f_putc( void )
 {
 unsigned char ucReturn;
 int iByte, iReturned;
 F_FILE *pxFile;
 char cFileName[ fsMAX_FILE_NAME_LEN ];

 	/* Obtain and print out the working directory. */
 	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
 	printf( "In directory %s\r\n", cRAMBuffer );

 	/* Create a sub directory. */
 	ucReturn = f_mkdir( pcDirectory1 );
 	configASSERT( ucReturn == F_NO_ERROR );

 	/* Move into the created sub-directory. */
 	ucReturn = f_chdir( pcDirectory1 );
 	configASSERT( ucReturn == F_NO_ERROR );

 	/* Obtain and print out the working directory. */
 	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
 	printf( "In directory %s\r\n", cRAMBuffer );

 	/* Create a subdirectory in the new directory. */
 	ucReturn = f_mkdir( pcDirectory2 );
 	configASSERT( ucReturn == F_NO_ERROR );

 	/* Move into the directory just created - now two directories down from
 	the root. */
 	ucReturn = f_chdir( pcDirectory2 );
 	configASSERT( ucReturn == F_NO_ERROR );

 	/* Obtain and print out the working directory. */
 	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
 	printf( "In directory %s\r\n", cRAMBuffer );
 	configASSERT( strcmp( cRAMBuffer, pcFullPath ) == 0 );

 	/* Generate the file name. */
 	sprintf( cFileName, "%s.txt", pcDirectory2 );

 	/* Print out the file name and the directory into which the file is being
 	written. */
 	printf( "Writing file %s in %s\r\n", cFileName, cRAMBuffer );

 	pxFile = f_open( cFileName, "w" );

 	/* Create a file 1 byte at a time.  The file is filled with incrementing
 	ascii characters starting from '0'. */
 	for( iByte = 0; iByte < fsPUTC_FILE_SIZE; iByte++ )
 	{
 		iReturned = f_putc( ( ( int ) '0' + iByte ), pxFile );
 		configASSERT( iReturned ==  ( ( int ) '0' + iByte ) );
 	}

 	/* Finished so close the file. */
 	f_close( pxFile );

 	/* Move back to the root directory. */
 	ucReturn = f_chdir( "../.." );
 	configASSERT( ucReturn == F_NO_ERROR );

 	/* Obtain and print out the working directory. */
 	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
 	printf( "Back in root directory %s\r\n", cRAMBuffer );
 	configASSERT( strcmp( cRAMBuffer, pcRoot ) == 0 );
 }
 /*-----------------------------------------------------------*/

 static void prvVerifyDemoFileUsing_f_getc( void )
 {
 unsigned char ucReturn;
 int iByte, iReturned;
 F_FILE *pxFile;
 char cFileName[ fsMAX_FILE_NAME_LEN ];

 	/* Move into the directory in which the file was created. */
 	ucReturn = f_chdir( pcFullPath );
 	configASSERT( ucReturn == F_NO_ERROR );

 	/* Obtain and print out the working directory. */
 	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
 	printf( "Back in directory %s\r\n", cRAMBuffer );
 	configASSERT( strcmp( cRAMBuffer, pcFullPath ) == 0 );

 	/* Generate the file name. */
 	sprintf( cFileName, "%s.txt", pcDirectory2 );

 	/* Print out the file name and the directory from which the file is being
 	read. */
 	printf( "Reading file %s in %s\r\n", cFileName, cRAMBuffer );

 	/* This time the file is opened for reading. */
 	pxFile = f_open( cFileName, "r" );

 	/* Read the file 1 byte at a time. */
 	for( iByte = 0; iByte < fsPUTC_FILE_SIZE; iByte++ )
 	{
 		iReturned = f_getc( pxFile );
 		configASSERT( iReturned ==  ( ( int ) '0' + iByte ) );
 	}

 	/* Finished so close the file. */
 	f_close( pxFile );

 	/* Move back to the root directory. */
 	ucReturn = f_chdir( "../.." );
 	configASSERT( ucReturn == F_NO_ERROR );

 	/* Obtain and print out the working directory. */
 	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
 	printf( "Back in root directory %s\r\n", cRAMBuffer );
 }
	/*
	FreeRTOS V8.0.1 - Copyright (C) 2014 Real Time Engineers Ltd.
	All rights reserved

	FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
	http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

	***************************************************************************
	* *
	* FreeRTOS tutorial books are available in pdf and paperback. *
	* Complete, revised, and edited pdf reference manuals are also *
	* available. *
	* *
	* Purchasing FreeRTOS documentation will not only help you, by *
	* ensuring you get running as quickly as possible and with an *
	* in-depth knowledge of how to use FreeRTOS, it will also help *
	* the FreeRTOS project to continue with its mission of providing *
	* professional grade, cross platform, de facto standard solutions *
	* for microcontrollers - completely free of charge! *
	* *
	* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
	* *
	* Thank you for using FreeRTOS, and thank you for your support! *
	* *
	***************************************************************************


	This file is part of the FreeRTOS distribution.

	FreeRTOS is free software; you can redistribute it and/or modify it under
	the terms of the GNU General Public License (version 2) as published by the
	Free Software Foundation AND MODIFIED BY the FreeRTOS exception.

	>>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
	distribute 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 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 itcan be
	viewed here: http://www.freertos.org/a00114.html and also obtained by
	writing to Real Time Engineers Ltd., contact details for whom are available
	on the FreeRTOS WEB site.

	1 tab == 4 spaces!

	***************************************************************************
	* *
	* Having a problem? Start by reading the FAQ "My application does *
	* not run, what could be wrong?" *
	* *
	* http://www.FreeRTOS.org/FAQHelp.html *
	* *
	***************************************************************************


	http://www.FreeRTOS.org - Documentation, books, training, latest versions,
	license and Real Time Engineers Ltd. contact details.

	http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
	including FreeRTOS+Trace - an indispensable productivity tool, and our new
	fully thread aware and reentrant UDP/IP stack.

	http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
	Integrity Systems, who sell the code with commercial support,
	indemnification and middleware, under the OpenRTOS brand.

	http://www.SafeRTOS.com - High Integrity Systems also provide a safety
	engineered and independently SIL3 certified version for use in safety and
	mission critical applications that require provable dependability.
	*/

	/*******************************************************************************
	* See the URL in the comments within main.c for the location of the online
	* documentation.
	******************************************************************************/

	/* Standard includes. */
	#include <stdio.h>
	#include <string.h>

	/* FreeRTOS includes. */
	#include "FreeRTOS.h"
	#include "task.h"

	/* File system includes. */
	#include "fat_sl.h"
	#include "api_mdriver_ram.h"

	/* 8.3 format, plus null terminator. */
	#define fsMAX_FILE_NAME_LEN 13

	/* The number of bytes read/written to the example files at a time. */
	#define fsRAM_BUFFER_SIZE 200

	/* The number of bytes written to the file that uses f_putc() and f_getc(). */
	#define fsPUTC_FILE_SIZE 100

	/* The number of files created in root. */
	#define fsROOT_FILES 5

	/-----------------------------------------------------------/

	/*
	* Creates and verifies different files on the volume, demonstrating the use of
	* various different API functions.
	*/
	void vCreateAndVerifySampleFiles( void );

	/*
	* Create a set of example files in the root directory of the volume using
	* f_write().
	*/
	static void prvCreateDemoFilesUsing_f_write( void );

	/*
	* Use f_read() to read back and verify the files that were created by
	* prvCreateDemoFilesUsing_f_write().
	*/
	static void prvVerifyDemoFileUsing_f_read( void );

	/*
	* Create an example file in a sub-directory using f_putc().
	*/
	static void prvCreateDemoFileUsing_f_putc( void );

	/*
	* Use f_getc() to read back and verify the file that was created by
	* prvCreateDemoFileUsing_f_putc().
	*/
	static void prvVerifyDemoFileUsing_f_getc( void );

	/-----------------------------------------------------------/

	/* A buffer used to both create content to write to disk, and read content back
	from a disk. Note there is no mutual exclusion on this buffer. */
	static char cRAMBuffer[ fsRAM_BUFFER_SIZE ];

	/* Names of directories that are created. */
	static const char pcRoot = "/", pcDirectory1 = "SUB1", pcDirectory2 = "SUB2", pcFullPath = "/SUB1/SUB2";

	/-----------------------------------------------------------/

	void vCreateAndVerifySampleFiles( void )
	{
	unsigned char ucStatus;

	/* First create the volume. */
	ucStatus = f_initvolume( ram_initfunc );

	/* It is expected that the volume is not formatted. */
	if( ucStatus == F_ERR_NOTFORMATTED )
	{
	/* Format the created volume. */
	ucStatus = f_format( F_FAT12_MEDIA );
	}

	if( ucStatus == F_NO_ERROR )
	{
	/* Create a set of files using f_write(). */
	prvCreateDemoFilesUsing_f_write();

	/* Read back and verify the files that were created using f_write(). */
	prvVerifyDemoFileUsing_f_read();

	/* Create sub directories two deep then create a file using putc. */
	prvCreateDemoFileUsing_f_putc();

	/* Read back and verify the file created by
	prvCreateDemoFileUsing_f_putc(). */
	prvVerifyDemoFileUsing_f_getc();
	}
	}
	/-----------------------------------------------------------/

	static void prvCreateDemoFilesUsing_f_write( void )
	{
	portBASE_TYPE xFileNumber, xWriteNumber;
	char cFileName[ fsMAX_FILE_NAME_LEN ];
	long lItemsWritten;
	F_FILE *pxFile;

	/* Create fsROOT_FILES files. Each created file will be
	( xFileNumber * fsRAM_BUFFER_SIZE ) bytes in length, and filled
	with a different repeating character. */
	for( xFileNumber = 1; xFileNumber <= fsROOT_FILES; xFileNumber++ )
	{
	/* Generate a file name. */
	sprintf( cFileName, "root%03d.txt", xFileNumber );

	/* Obtain the current working directory and print out the file name and
	the directory into which the file is being written. */
	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
	printf( "Creating file %s in %s\r\n", cFileName, cRAMBuffer );

	/* Open the file, creating the file if it does not already exist. */
	pxFile = f_open( cFileName, "w" );
	configASSERT( pxFile );

	/* Fill the RAM buffer with data that will be written to the file. This
	is just a repeating ascii character that indicates the file number. */
	memset( cRAMBuffer, ( int ) ( '0' + xFileNumber ), fsRAM_BUFFER_SIZE );

	/* Write the RAM buffer to the opened file a number of times. The
	number of times the RAM buffer is written to the file depends on the
	file number, so the length of each created file will be different. */
	for( xWriteNumber = 0; xWriteNumber < xFileNumber; xWriteNumber++ )
	{
	lItemsWritten = f_write( cRAMBuffer, fsRAM_BUFFER_SIZE, 1, pxFile );
	configASSERT( lItemsWritten == 1 );
	}

	/* Close the file so another file can be created. */
	f_close( pxFile );
	}
	}
	/-----------------------------------------------------------/

	static void prvVerifyDemoFileUsing_f_read( void )
	{
	portBASE_TYPE xFileNumber, xReadNumber;
	char cFileName[ fsMAX_FILE_NAME_LEN ];
	long lItemsRead, lChar;
	F_FILE *pxFile;

	/* Read back the files that were created by
	prvCreateDemoFilesUsing_f_write(). */
	for( xFileNumber = 1; xFileNumber <= fsROOT_FILES; xFileNumber++ )
	{
	/* Generate the file name. */
	sprintf( cFileName, "root%03d.txt", xFileNumber );

	/* Obtain the current working directory and print out the file name and
	the directory from which the file is being read. */
	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
	printf( "Reading file %s from %s\r\n", cFileName, cRAMBuffer );

	/* Open the file for reading. */
	pxFile = f_open( cFileName, "r" );
	configASSERT( pxFile );

	/* Read the file into the RAM buffer, checking the file contents are as
	expected. The size of the file depends on the file number. */
	for( xReadNumber = 0; xReadNumber < xFileNumber; xReadNumber++ )
	{
	/* Start with the RAM buffer clear. */
	memset( cRAMBuffer, 0x00, fsRAM_BUFFER_SIZE );

	lItemsRead = f_read( cRAMBuffer, fsRAM_BUFFER_SIZE, 1, pxFile );
	configASSERT( lItemsRead == 1 );

	/* Check the RAM buffer is filled with the expected data. Each
	file contains a different repeating ascii character that indicates
	the number of the file. */
	for( lChar = 0; lChar < fsRAM_BUFFER_SIZE; lChar++ )
	{
	configASSERT( cRAMBuffer[ lChar ] == ( '0' + ( char ) xFileNumber ) );
	}
	}

	/* Close the file. */
	f_close( pxFile );
	}
	}
	/-----------------------------------------------------------/

	static void prvCreateDemoFileUsing_f_putc( void )
	{
	unsigned char ucReturn;
	int iByte, iReturned;
	F_FILE *pxFile;
	char cFileName[ fsMAX_FILE_NAME_LEN ];

	/* Obtain and print out the working directory. */
	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
	printf( "In directory %s\r\n", cRAMBuffer );

	/* Create a sub directory. */
	ucReturn = f_mkdir( pcDirectory1 );
	configASSERT( ucReturn == F_NO_ERROR );

	/* Move into the created sub-directory. */
	ucReturn = f_chdir( pcDirectory1 );
	configASSERT( ucReturn == F_NO_ERROR );

	/* Obtain and print out the working directory. */
	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
	printf( "In directory %s\r\n", cRAMBuffer );

	/* Create a subdirectory in the new directory. */
	ucReturn = f_mkdir( pcDirectory2 );
	configASSERT( ucReturn == F_NO_ERROR );

	/* Move into the directory just created - now two directories down from
	the root. */
	ucReturn = f_chdir( pcDirectory2 );
	configASSERT( ucReturn == F_NO_ERROR );

	/* Obtain and print out the working directory. */
	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
	printf( "In directory %s\r\n", cRAMBuffer );
	configASSERT( strcmp( cRAMBuffer, pcFullPath ) == 0 );

	/* Generate the file name. */
	sprintf( cFileName, "%s.txt", pcDirectory2 );

	/* Print out the file name and the directory into which the file is being
	written. */
	printf( "Writing file %s in %s\r\n", cFileName, cRAMBuffer );

	pxFile = f_open( cFileName, "w" );

	/* Create a file 1 byte at a time. The file is filled with incrementing
	ascii characters starting from '0'. */
	for( iByte = 0; iByte < fsPUTC_FILE_SIZE; iByte++ )
	{
	iReturned = f_putc( ( ( int ) '0' + iByte ), pxFile );
	configASSERT( iReturned == ( ( int ) '0' + iByte ) );
	}

	/* Finished so close the file. */
	f_close( pxFile );

	/* Move back to the root directory. */
	ucReturn = f_chdir( "../.." );
	configASSERT( ucReturn == F_NO_ERROR );

	/* Obtain and print out the working directory. */
	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
	printf( "Back in root directory %s\r\n", cRAMBuffer );
	configASSERT( strcmp( cRAMBuffer, pcRoot ) == 0 );
	}
	/-----------------------------------------------------------/

	static void prvVerifyDemoFileUsing_f_getc( void )
	{
	unsigned char ucReturn;
	int iByte, iReturned;
	F_FILE *pxFile;
	char cFileName[ fsMAX_FILE_NAME_LEN ];

	/* Move into the directory in which the file was created. */
	ucReturn = f_chdir( pcFullPath );
	configASSERT( ucReturn == F_NO_ERROR );

	/* Obtain and print out the working directory. */
	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
	printf( "Back in directory %s\r\n", cRAMBuffer );
	configASSERT( strcmp( cRAMBuffer, pcFullPath ) == 0 );

	/* Generate the file name. */
	sprintf( cFileName, "%s.txt", pcDirectory2 );

	/* Print out the file name and the directory from which the file is being
	read. */
	printf( "Reading file %s in %s\r\n", cFileName, cRAMBuffer );

	/* This time the file is opened for reading. */
	pxFile = f_open( cFileName, "r" );

	/* Read the file 1 byte at a time. */
	for( iByte = 0; iByte < fsPUTC_FILE_SIZE; iByte++ )
	{
	iReturned = f_getc( pxFile );
	configASSERT( iReturned == ( ( int ) '0' + iByte ) );
	}

	/* Finished so close the file. */
	f_close( pxFile );

	/* Move back to the root directory. */
	ucReturn = f_chdir( "../.." );
	configASSERT( ucReturn == F_NO_ERROR );

	/* Obtain and print out the working directory. */
	f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
	printf( "Back in root directory %s\r\n", cRAMBuffer );
	}