2 FreeRTOS V7.0.2 - 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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58 /* lwIP core includes */
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59 #include "lwip/opt.h"
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60 #include "lwip/tcpip.h"
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62 /* applications includes */
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63 #include "apps/httpserver_raw_from_lwIP_download/httpd.h"
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65 /* include the port-dependent configuration */
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66 #include "lwipcfg_msvc.h"
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68 /* Dimensions the cTxBuffer array - which is itself used to hold replies from
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69 command line commands. cTxBuffer is a shared buffer, so protected by the
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70 xTxBufferMutex mutex. */
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71 #define lwipappsTX_BUFFER_SIZE 1024
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73 /* The maximum time to block waiting to obtain the xTxBufferMutex to become
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75 #define lwipappsMAX_TIME_TO_WAIT_FOR_TX_BUFFER_MS ( 100 / portTICK_RATE_MS )
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77 /* Definitions of the various SSI callback functions within the pccSSITags
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78 array. If pccSSITags is updated, then these definitions must also be updated. */
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79 #define ssiTASK_STATS_INDEX 0
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80 #define ssiRUN_TIME_STATS_INDEX 1
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82 /*-----------------------------------------------------------*/
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85 * The function that implements the lwIP based sockets command interpreter
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88 extern void vBasicSocketsCommandInterpreterTask( void *pvParameters );
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91 * The SSI handler callback function passed to lwIP.
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93 static unsigned short uslwIPAppsSSIHandler( int iIndex, char *pcBuffer, int iBufferLength );
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95 /*-----------------------------------------------------------*/
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97 /* The SSI strings that are embedded in the served html files. If this array
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98 is changed, then the index position defined by the #defines such as
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99 ssiTASK_STATS_INDEX above must also be updated. */
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100 static const char *pccSSITags[] =
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106 /* Semaphore used to guard the Tx buffer. */
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107 static xSemaphoreHandle xTxBufferMutex = NULL;
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109 /* The Tx buffer itself. This is used to hold the text generated by the
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110 execution of command line commands, and (hopefully) the execution of
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111 server side include callbacks. It is a shared buffer so protected by the
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112 xTxBufferMutex mutex. pcLwipAppsBlockingGetTxBuffer() and
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113 vLwipAppsReleaseTxBuffer() are provided to obtain and release the
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114 xTxBufferMutex respectively. pcLwipAppsBlockingGetTxBuffer() must be used with
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115 caution as it has the potential to block. */
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116 static signed char cTxBuffer[ lwipappsTX_BUFFER_SIZE ];
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118 /*-----------------------------------------------------------*/
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121 /* Called from the TCP/IP thread. */
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122 void lwIPAppsInit( void *pvArgument )
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124 ip_addr_t xIPAddr, xNetMask, xGateway;
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125 extern err_t ethernetif_init( struct netif *xNetIf );
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126 static struct netif xNetIf;
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128 ( void ) pvArgument;
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130 /* Set up the network interface. */
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131 ip_addr_set_zero( &xGateway );
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132 ip_addr_set_zero( &xIPAddr );
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133 ip_addr_set_zero( &xNetMask );
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135 LWIP_PORT_INIT_GW(&xGateway);
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136 LWIP_PORT_INIT_IPADDR(&xIPAddr);
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137 LWIP_PORT_INIT_NETMASK(&xNetMask);
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138 printf("Starting lwIP, local interface IP is %s\n", ip_ntoa(&xIPAddr));
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140 netif_set_default( netif_add( &xNetIf, &xIPAddr, &xNetMask, &xGateway, NULL, ethernetif_init, tcpip_input ) );
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141 netif_set_up( &xNetIf );
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143 /* Install the server side include handler. */
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144 http_set_ssi_handler( uslwIPAppsSSIHandler, pccSSITags, sizeof( pccSSITags ) / sizeof( char * ) );
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146 /* Create the mutex used to ensure mutual exclusive access to the Tx
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148 xTxBufferMutex = xSemaphoreCreateMutex();
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149 configASSERT( xTxBufferMutex );
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151 /* Create the httpd server from the standard lwIP code. This demonstrates
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152 use of the lwIP raw API. */
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155 /* Create the FreeRTOS defined basic command server. This demonstrates use
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156 of the lwIP sockets API. */
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157 xTaskCreate( vBasicSocketsCommandInterpreterTask, ( signed char * ) "CmdInt", configMINIMAL_STACK_SIZE * 10, NULL, configMAX_PRIORITIES - 2, NULL );
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159 /*-----------------------------------------------------------*/
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161 static unsigned short uslwIPAppsSSIHandler( int iIndex, char *pcBuffer, int iBufferLength )
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163 static unsigned int uiUpdateCount = 0;
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164 static char cUpdateString[ 200 ];
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165 extern char *pcMainGetTaskStatusMessage( void );
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167 /* Unused parameter. */
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168 ( void ) iBufferLength;
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170 /* The SSI handler function that generates text depending on the index of
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171 the SSI tag encountered. */
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175 case ssiTASK_STATS_INDEX :
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176 vTaskList( ( signed char * ) pcBuffer );
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179 case ssiRUN_TIME_STATS_INDEX :
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180 vTaskGetRunTimeStats( ( signed char * ) pcBuffer );
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184 /* Include a count of the number of times an SSI function has been executed
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185 in the returned string. */
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187 sprintf( cUpdateString, "\r\n\r\n%u\r\nStatus - %s", uiUpdateCount, pcMainGetTaskStatusMessage() );
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188 strcat( pcBuffer, cUpdateString );
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190 return strlen( pcBuffer );
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192 /*-----------------------------------------------------------*/
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194 signed char *pcLwipAppsBlockingGetTxBuffer( void )
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196 signed char *pcReturn;
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198 /* Attempt to obtain the semaphore that guards the Tx buffer. */
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199 if( xSemaphoreTakeRecursive( xTxBufferMutex, lwipappsMAX_TIME_TO_WAIT_FOR_TX_BUFFER_MS ) == pdFAIL )
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201 /* The semaphore could not be obtained before timing out. */
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206 /* The semaphore was obtained successfully. Return a pointer to the
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208 pcReturn = cTxBuffer;
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213 /*-----------------------------------------------------------*/
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215 void vLwipAppsReleaseTxBuffer( void )
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217 /* Finished with the Tx buffer. Return the mutex. */
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218 xSemaphoreGiveRecursive( xTxBufferMutex );
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