2 FreeRTOS V7.4.2 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
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5 http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 ***************************************************************************
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9 * FreeRTOS tutorial books are available in pdf and paperback. *
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10 * Complete, revised, and edited pdf reference manuals are also *
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13 * Purchasing FreeRTOS documentation will not only help you, by *
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14 * ensuring you get running as quickly as possible and with an *
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15 * in-depth knowledge of how to use FreeRTOS, it will also help *
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16 * the FreeRTOS project to continue with its mission of providing *
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17 * professional grade, cross platform, de facto standard solutions *
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18 * for microcontrollers - completely free of charge! *
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20 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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22 * Thank you for using FreeRTOS, and thank you for your support! *
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24 ***************************************************************************
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27 This file is part of the FreeRTOS distribution.
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29 FreeRTOS is free software; you can redistribute it and/or modify it under
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30 the terms of the GNU General Public License (version 2) as published by the
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31 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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33 >>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
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34 distribute a combined work that includes FreeRTOS without being obliged to
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35 provide the source code for proprietary components outside of the FreeRTOS
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38 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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39 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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40 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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41 details. You should have received a copy of the GNU General Public License
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42 and the FreeRTOS license exception along with FreeRTOS; if not itcan be
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43 viewed here: http://www.freertos.org/a00114.html and also obtained by
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44 writing to Real Time Engineers Ltd., contact details for whom are available
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45 on the FreeRTOS WEB site.
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49 ***************************************************************************
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51 * Having a problem? Start by reading the FAQ "My application does *
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52 * not run, what could be wrong?" *
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54 * http://www.FreeRTOS.org/FAQHelp.html *
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56 ***************************************************************************
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59 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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60 license and Real Time Engineers Ltd. contact details.
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62 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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63 including FreeRTOS+Trace - an indispensable productivity tool, and our new
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64 fully thread aware and reentrant UDP/IP stack.
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66 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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67 Integrity Systems, who sell the code with commercial support,
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68 indemnification and middleware, under the OpenRTOS brand.
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70 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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71 engineered and independently SIL3 certified version for use in safety and
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72 mission critical applications that require provable dependability.
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75 /*******************************************************************************
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76 * See the URL in the comments within main.c for the location of the online
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78 ******************************************************************************/
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80 /* Standard includes. */
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83 /* FreeRTOS includes. */
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84 #include "FreeRTOS.h"
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87 /* File system includes. */
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89 #include "api_mdriver_ram.h"
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91 /* 8.3 format, plus null terminator. */
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92 #define fsMAX_FILE_NAME_LEN 13
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94 /* The number of bytes read/written to the example files at a time. */
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95 #define fsRAM_BUFFER_SIZE 200
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97 /* The number of bytes written to the file that uses f_putc() and f_getc(). */
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98 #define fsPUTC_FILE_SIZE 100
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100 /* The number of files created in root. */
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101 #define fsROOT_FILES 3
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103 /*-----------------------------------------------------------*/
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106 * Creates and verifies different files on the volume, demonstrating the use of
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107 * various different API functions.
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109 void vCreateAndVerifySampleFiles( void );
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112 * Create a set of example files in the root directory of the volume using
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115 static void prvCreateDemoFilesUsing_f_write( void );
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118 * Use f_read() to read back and verify the files that were created by
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119 * prvCreateDemoFilesUsing_f_write().
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121 static void prvVerifyDemoFileUsing_f_read( void );
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124 * Create an example file in a sub-directory using f_putc().
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126 static void prvCreateDemoFileUsing_f_putc( void );
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129 * Use f_getc() to read back and verify the file that was created by
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130 * prvCreateDemoFileUsing_f_putc().
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132 static void prvVerifyDemoFileUsing_f_getc( void );
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134 /*-----------------------------------------------------------*/
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136 /* A buffer used to both create content to write to disk, and read content back
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137 from a disk. Note there is no mutual exclusion on this buffer. */
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138 static char cRAMBuffer[ fsRAM_BUFFER_SIZE ];
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140 /* Names of directories that are created. */
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141 static const char *pcRoot = "/", *pcDirectory1 = "SUB1", *pcDirectory2 = "SUB2", *pcFullPath = "/SUB1/SUB2";
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143 /*-----------------------------------------------------------*/
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145 void vCreateAndVerifySampleFiles( void )
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147 unsigned char ucStatus;
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149 /* First create the volume. */
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150 ucStatus = f_initvolume( ram_initfunc );
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152 /* It is expected that the volume is not formatted. */
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153 if( ucStatus == F_ERR_NOTFORMATTED )
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155 /* Format the created volume. */
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156 ucStatus = f_format( F_FAT12_MEDIA );
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159 if( ucStatus == F_NO_ERROR )
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161 /* Create a set of files using f_write(). */
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162 prvCreateDemoFilesUsing_f_write();
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164 /* Read back and verify the files that were created using f_write(). */
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165 prvVerifyDemoFileUsing_f_read();
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167 /* Create sub directories two deep then create a file using putc. */
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168 prvCreateDemoFileUsing_f_putc();
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170 /* Read back and verify the file created by
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171 prvCreateDemoFileUsing_f_putc(). */
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172 prvVerifyDemoFileUsing_f_getc();
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175 /*-----------------------------------------------------------*/
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177 static void prvCreateDemoFilesUsing_f_write( void )
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179 portBASE_TYPE xFileNumber, xWriteNumber;
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180 char cFileName[ fsMAX_FILE_NAME_LEN ];
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181 long lItemsWritten;
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184 /* Create fsROOT_FILES files. Each created file will be
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185 ( xFileNumber * fsRAM_BUFFER_SIZE ) bytes in length, and filled
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186 with a different repeating character. */
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187 for( xFileNumber = 1; xFileNumber <= fsROOT_FILES; xFileNumber++ )
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189 /* Generate a file name. */
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190 sprintf( cFileName, "root%03d.txt", xFileNumber );
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192 /* Obtain the current working directory and print out the file name and
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193 the directory into which the file is being written. */
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194 f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
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195 printf( "Creating file %s in %s\r\n", cFileName, cRAMBuffer );
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197 /* Open the file, creating the file if it does not already exist. */
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198 pxFile = f_open( cFileName, "w" );
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199 configASSERT( pxFile );
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201 /* Fill the RAM buffer with data that will be written to the file. This
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202 is just a repeating ascii character that indicates the file number. */
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203 memset( cRAMBuffer, ( int ) ( '0' + xFileNumber ), fsRAM_BUFFER_SIZE );
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205 /* Write the RAM buffer to the opened file a number of times. The
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206 number of times the RAM buffer is written to the file depends on the
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207 file number, so the length of each created file will be different. */
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208 for( xWriteNumber = 0; xWriteNumber < xFileNumber; xWriteNumber++ )
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210 lItemsWritten = f_write( cRAMBuffer, fsRAM_BUFFER_SIZE, 1, pxFile );
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211 configASSERT( lItemsWritten == 1 );
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214 /* Close the file so another file can be created. */
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218 /*-----------------------------------------------------------*/
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220 static void prvVerifyDemoFileUsing_f_read( void )
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222 portBASE_TYPE xFileNumber, xReadNumber;
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223 char cFileName[ fsMAX_FILE_NAME_LEN ];
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224 long lItemsRead, lChar;
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227 /* Read back the files that were created by
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228 prvCreateDemoFilesUsing_f_write(). */
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229 for( xFileNumber = 1; xFileNumber <= fsROOT_FILES; xFileNumber++ )
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231 /* Generate the file name. */
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232 sprintf( cFileName, "root%03d.txt", xFileNumber );
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234 /* Obtain the current working directory and print out the file name and
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235 the directory from which the file is being read. */
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236 f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
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237 printf( "Reading file %s from %s\r\n", cFileName, cRAMBuffer );
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239 /* Open the file for reading. */
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240 pxFile = f_open( cFileName, "r" );
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241 configASSERT( pxFile );
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243 /* Read the file into the RAM buffer, checking the file contents are as
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244 expected. The size of the file depends on the file number. */
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245 for( xReadNumber = 0; xReadNumber < xFileNumber; xReadNumber++ )
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247 /* Start with the RAM buffer clear. */
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248 memset( cRAMBuffer, 0x00, fsRAM_BUFFER_SIZE );
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250 lItemsRead = f_read( cRAMBuffer, fsRAM_BUFFER_SIZE, 1, pxFile );
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251 configASSERT( lItemsRead == 1 );
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253 /* Check the RAM buffer is filled with the expected data. Each
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254 file contains a different repeating ascii character that indicates
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255 the number of the file. */
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256 for( lChar = 0; lChar < fsRAM_BUFFER_SIZE; lChar++ )
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258 configASSERT( cRAMBuffer[ lChar ] == ( '0' + ( char ) xFileNumber ) );
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262 /* Close the file. */
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266 /*-----------------------------------------------------------*/
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268 static void prvCreateDemoFileUsing_f_putc( void )
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270 unsigned char ucReturn;
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271 int iByte, iReturned;
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273 char cFileName[ fsMAX_FILE_NAME_LEN ];
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275 /* Obtain and print out the working directory. */
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276 f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
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277 printf( "In directory %s\r\n", cRAMBuffer );
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279 /* Create a sub directory. */
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280 ucReturn = f_mkdir( pcDirectory1 );
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281 configASSERT( ucReturn == F_NO_ERROR );
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283 /* Move into the created sub-directory. */
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284 ucReturn = f_chdir( pcDirectory1 );
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285 configASSERT( ucReturn == F_NO_ERROR );
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287 /* Obtain and print out the working directory. */
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288 f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
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289 printf( "In directory %s\r\n", cRAMBuffer );
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291 /* Create a subdirectory in the new directory. */
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292 ucReturn = f_mkdir( pcDirectory2 );
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293 configASSERT( ucReturn == F_NO_ERROR );
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295 /* Move into the directory just created - now two directories down from
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297 ucReturn = f_chdir( pcDirectory2 );
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298 configASSERT( ucReturn == F_NO_ERROR );
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300 /* Obtain and print out the working directory. */
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301 f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
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302 printf( "In directory %s\r\n", cRAMBuffer );
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303 configASSERT( strcmp( ( const char * ) cRAMBuffer, pcFullPath ) == 0 );
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305 /* Generate the file name. */
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306 sprintf( cFileName, "%s.txt", pcDirectory2 );
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308 /* Print out the file name and the directory into which the file is being
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310 printf( "Writing file %s in %s\r\n", cFileName, cRAMBuffer );
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312 pxFile = f_open( cFileName, "w" );
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314 /* Create a file 1 byte at a time. The file is filled with incrementing
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315 ascii characters starting from '0'. */
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316 for( iByte = 0; iByte < fsPUTC_FILE_SIZE; iByte++ )
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318 iReturned = f_putc( ( ( int ) '0' + iByte ), pxFile );
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319 configASSERT( iReturned == ( ( int ) '0' + iByte ) );
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322 /* Finished so close the file. */
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325 /* Move back to the root directory. */
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326 ucReturn = f_chdir( "../.." );
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327 configASSERT( ucReturn == F_NO_ERROR );
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329 /* Obtain and print out the working directory. */
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330 f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
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331 printf( "Back in root directory %s\r\n", cRAMBuffer );
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332 configASSERT( strcmp( ( const char * ) cRAMBuffer, pcRoot ) == 0 );
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334 /*-----------------------------------------------------------*/
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336 static void prvVerifyDemoFileUsing_f_getc( void )
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338 unsigned char ucReturn;
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339 int iByte, iReturned;
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341 char cFileName[ fsMAX_FILE_NAME_LEN ];
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343 /* Move into the directory in which the file was created. */
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344 ucReturn = f_chdir( pcFullPath );
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345 configASSERT( ucReturn == F_NO_ERROR );
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347 /* Obtain and print out the working directory. */
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348 f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
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349 printf( "Back in directory %s\r\n", cRAMBuffer );
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350 configASSERT( strcmp( ( const char * ) cRAMBuffer, pcFullPath ) == 0 );
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352 /* Generate the file name. */
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353 sprintf( cFileName, "%s.txt", pcDirectory2 );
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355 /* Print out the file name and the directory from which the file is being
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357 printf( "Reading file %s in %s\r\n", cFileName, cRAMBuffer );
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359 /* This time the file is opened for reading. */
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360 pxFile = f_open( cFileName, "r" );
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362 /* Read the file 1 byte at a time. */
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363 for( iByte = 0; iByte < fsPUTC_FILE_SIZE; iByte++ )
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365 iReturned = f_getc( pxFile );
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366 configASSERT( iReturned == ( ( int ) '0' + iByte ) );
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369 /* Finished so close the file. */
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372 /* Move back to the root directory. */
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373 ucReturn = f_chdir( "../.." );
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374 configASSERT( ucReturn == F_NO_ERROR );
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376 /* Obtain and print out the working directory. */
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377 f_getcwd( cRAMBuffer, fsRAM_BUFFER_SIZE );
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378 printf( "Back in root directory %s\r\n", cRAMBuffer );
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