2 FreeRTOS V7.1.0 - 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 /* Standard includes. */
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59 /* FreeRTOS includes. */
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60 #include "FreeRTOS.h"
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64 /* Common demo includes. */
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67 /* Example includes. */
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68 #include "FreeRTOS_CLI.h"
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69 #include "UARTCommandConsole.h"
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71 /* Dimensions the buffer into which input characters are placed. */
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72 #define cmdMAX_INPUT_SIZE 50
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74 /* The maximum time in ticks to wait for the UART access mutex. */
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75 #define cmdMAX_MUTEX_WAIT ( 200 / portTICK_RATE_MS )
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77 /*-----------------------------------------------------------*/
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80 * The task that implements the command console processing.
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82 static void prvUARTCommandConsoleTask( void *pvParameters );
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84 /*-----------------------------------------------------------*/
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86 /* Const messages output by the command console. */
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87 static const char * const pcWelcomeMessage = "FreeRTOS command server.\r\nType Help to view a list of registered commands.\r\n\r\n>";
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88 static const char * const pcEndOfOutputMessage = "\r\n[Press ENTER to execute the previous command again]\r\n>";
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89 static const char * const pcNewLine = "\r\n";
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91 /*-----------------------------------------------------------*/
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93 void vUARTCommandConsoleStart( uint16_t usStackSize, unsigned portBASE_TYPE uxPriority )
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95 /* Create that task that handles the console itself. */
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96 xTaskCreate( prvUARTCommandConsoleTask, /* The task that implements the command console. */
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97 "CLI", /* Text name assigned to the task. This is just to assist debugging. The kernel does not use this name itself. */
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98 usStackSize, /* The size of the stack allocated to the task. */
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99 NULL, /* The parameter is not used, so NULL is passed. */
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100 uxPriority, /* The priority allocated to the task. */
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101 NULL ); /* A handle is not required, so just pass NULL. */
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103 /*-----------------------------------------------------------*/
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105 static void prvUARTCommandConsoleTask( void *pvParameters )
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107 char cRxedChar, cInputIndex = 0, *pcOutputString;
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108 static char cInputString[ cmdMAX_INPUT_SIZE ], cLastInputString[ cmdMAX_INPUT_SIZE ];
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109 portBASE_TYPE xReturned;
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111 ( void ) pvParameters;
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113 /* Obtain the address of the output buffer. Note there is no mutual
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114 exclusion on this buffer as it is assumed only one command console
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115 interface will be used at any one time. */
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116 pcOutputString = FreeRTOS_CLIGetOutputBuffer();
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118 /* Send the welcome message. */
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119 vSerialPutString( NULL, ( const signed char * ) pcWelcomeMessage, strlen( ( char * ) pcWelcomeMessage ) );
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123 /* Only interested in reading one character at a time. */
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124 while( xSerialGetChar( NULL, ( signed char * ) &cRxedChar, portMAX_DELAY ) == pdFALSE );
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126 /* Echo the character back. */
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127 xSerialPutChar( NULL, cRxedChar, portMAX_DELAY );
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129 /* Was it the end of the line? */
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130 if( cRxedChar == '\n' || cRxedChar == '\r' )
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132 /* Just to space the output from the input. */
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133 vSerialPutString( NULL, ( const signed char * ) pcNewLine, strlen( ( char * ) pcNewLine ) );
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135 /* See if the command is empty, indicating that the last command is
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136 to be executed again. */
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137 if( cInputIndex == 0 )
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139 /* Copy the last command back into the input string. */
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140 strcpy( ( char * ) cInputString, ( char * ) cLastInputString );
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143 /* Pass the received command to the command interpreter. The
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144 command interpreter is called repeatedly until it returns pdFALSE
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145 (indicating there is no more output) as it might generate more than
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149 /* Get the next output string from the command interpreter. */
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150 xReturned = FreeRTOS_CLIProcessCommand( cInputString, pcOutputString, configCOMMAND_INT_MAX_OUTPUT_SIZE );
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152 /* Write the generated string to the UART. */
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153 vSerialPutString( NULL, ( const signed char * ) pcOutputString, strlen( ( char * ) pcOutputString ) );
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155 } while( xReturned != pdFALSE );
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157 /* All the strings generated by the input command have been sent.
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158 Clear the input string ready to receive the next command. Remember
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159 the command that was just processed first in case it is to be
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160 processed again. */
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161 strcpy( ( char * ) cLastInputString, ( char * ) cInputString );
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163 memset( cInputString, 0x00, cmdMAX_INPUT_SIZE );
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164 vSerialPutString( NULL, ( const signed char * ) pcEndOfOutputMessage, strlen( ( char * ) pcEndOfOutputMessage ) );
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168 if( cRxedChar == '\r' )
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170 /* Ignore the character. */
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172 else if( cRxedChar == '\b' )
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174 /* Backspace was pressed. Erase the last character in the
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175 string - if any. */
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176 if( cInputIndex > 0 )
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179 cInputString[ cInputIndex ] = '\0';
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184 /* A character was entered. Add it to the string
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185 entered so far. When a \n is entered the complete
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186 string will be passed to the command interpreter. */
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187 if( ( cRxedChar >= ' ' ) && ( cRxedChar <= '~' ) )
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189 if( cInputIndex < cmdMAX_INPUT_SIZE )
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191 cInputString[ cInputIndex ] = cRxedChar;
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199 /*-----------------------------------------------------------*/
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