2 FreeRTOS V7.0.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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5 ***************************************************************************
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7 * FreeRTOS tutorial books are available in pdf and paperback. *
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8 * Complete, revised, and edited pdf reference manuals are also *
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11 * Purchasing FreeRTOS documentation will not only help you, by *
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12 * ensuring you get running as quickly as possible and with an *
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13 * in-depth knowledge of how to use FreeRTOS, it will also help *
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14 * the FreeRTOS project to continue with its mission of providing *
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15 * professional grade, cross platform, de facto standard solutions *
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16 * for microcontrollers - completely free of charge! *
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18 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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20 * Thank you for using FreeRTOS, and thank you for your support! *
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22 ***************************************************************************
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25 This file is part of the FreeRTOS distribution.
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27 FreeRTOS is free software; you can redistribute it and/or modify it under
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28 the terms of the GNU General Public License (version 2) as published by the
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29 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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30 >>>NOTE<<< The modification to the GPL is included to allow you to
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31 distribute a combined work that includes FreeRTOS without being obliged to
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32 provide the source code for proprietary components outside of the FreeRTOS
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33 kernel. FreeRTOS is distributed in the hope that it will be useful, but
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34 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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35 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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36 more details. You should have received a copy of the GNU General Public
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37 License and the FreeRTOS license exception along with FreeRTOS; if not it
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38 can be viewed here: http://www.freertos.org/a00114.html and also obtained
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39 by writing to Richard Barry, contact details for whom are available on the
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44 http://www.FreeRTOS.org - Documentation, latest information, license and
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47 http://www.SafeRTOS.com - A version that is certified for use in safety
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50 http://www.OpenRTOS.com - Commercial support, development, porting,
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51 licensing and training services.
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54 #include "FreeRTOS.h"
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56 #include "CommandInterpreter.h"
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58 typedef struct xCOMMAND_INPUT_LIST
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60 const xCommandLineInput *pxCommandLineDefinition;
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61 struct xCOMMAND_INPUT_LIST *pxNext;
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62 } xCommandLineInputListItem;
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65 * The callback function that is executed when "help" is entered. This is the
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66 * only default command that is always present.
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68 static const signed char *prvHelpCommand( void );
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70 /* The definition of the "help" command. This command is always at the front
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71 of the list of registered commands. */
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72 static const xCommandLineInput xHelpCommand =
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75 "help: Lists all the registered commands\r\n",
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79 /* The definition of the list of commands. Commands that are registered are
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80 added to this list. */
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81 static xCommandLineInputListItem xRegisteredCommands =
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83 &xHelpCommand, /* The first command in the list is always the help command, defined in this file. */
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84 NULL /* The next pointer is initialised to NULL, as there are no other registered commands yet. */
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87 /*-----------------------------------------------------------*/
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89 portBASE_TYPE xCmdIntRegisterCommand( const xCommandLineInput * const pxCommandToRegister )
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91 static xCommandLineInputListItem *pxLastCommandInList = &xRegisteredCommands;
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92 xCommandLineInputListItem *pxNewListItem;
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93 portBASE_TYPE xReturn = pdFAIL;
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95 /* Check the parameter is not NULL. */
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96 configASSERT( pxCommandToRegister );
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98 /* Create a new list item that will reference the command being registered. */
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99 pxNewListItem = ( xCommandLineInputListItem * ) pvPortMalloc( sizeof( xCommandLineInputListItem ) );
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100 configASSERT( pxNewListItem );
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102 if( pxNewListItem != NULL )
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104 taskENTER_CRITICAL();
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106 /* Reference the command being registered from the newly created
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108 pxNewListItem->pxCommandLineDefinition = pxCommandToRegister;
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110 /* The new list item will get added to the end of the list, so
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111 pxNext has nowhere to point. */
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112 pxNewListItem->pxNext = NULL;
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114 /* Add the newly created list item to the end of the already existing
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116 pxLastCommandInList->pxNext = pxNewListItem;
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118 /* Set the end of list marker to the new list item. */
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119 pxLastCommandInList = pxNewListItem;
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127 /*-----------------------------------------------------------*/
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129 const signed char *pcCmdIntProcessCommand( const signed char * const pcCommandInput )
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131 static const xCommandLineInputListItem *pxCommand = NULL;
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132 signed const char *pcReturn = NULL;
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134 /* Note: This function is not re-entrant. It must not be called from more
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137 if( pxCommand == NULL )
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139 /* Search for the command string in the list of registered commands. */
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140 for( pxCommand = &xRegisteredCommands; pxCommand != NULL; pxCommand = pxCommand->pxNext )
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142 if( strcmp( ( const char * ) pcCommandInput, ( const char * ) pxCommand->pxCommandLineDefinition->pcCommand ) == 0 )
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144 /* The command has been found, the loop can exit so the command
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145 can be executed. */
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151 if( pxCommand != NULL )
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153 pcReturn = pxCommand->pxCommandLineDefinition->pxCommandInterpreter();
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155 /* If no strings were returned, then all the strings that are going to
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156 be returned by the current command have already been returned, and
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157 pxCommand can be reset to NULL ready to search for the next entered
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159 if( pcReturn == NULL )
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166 pcReturn = "Command not recognised. Available commands are listed below.\r\n\r\n";
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168 /* Print out the help string. */
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169 pxCommand = &xRegisteredCommands;
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174 /*-----------------------------------------------------------*/
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176 static const signed char *prvHelpCommand( void )
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178 static const xCommandLineInputListItem * pxCommand = &xRegisteredCommands;
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179 signed const char *pcReturn;
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181 /* pxCommand will be NULL if all the commands in the list have already been
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183 if( pxCommand != NULL )
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185 /* Return the next command help string, before moving the pointer on to
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186 the next command in the list. */
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187 pcReturn = pxCommand->pxCommandLineDefinition->pcHelpString;
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188 pxCommand = pxCommand->pxNext;
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192 /* Reset the pointer back to the start of the list. */
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193 pxCommand = &xRegisteredCommands;
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195 /* Return NULL to show that there are no more strings to return. */
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