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 /* Standard includes. */
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57 /* Scheduler includes. */
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58 #include "FreeRTOS.h"
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64 #include "net/uip.h"
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65 #include "net/uip_arp.h"
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66 #include "apps/httpd/httpd.h"
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67 #include "sys/timer.h"
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68 #include "net/clock-arch.h"
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71 /* Demo includes. */
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72 #include "ParTest.h"
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74 /* The buffer used by the uIP stack to both receive and send. In this case,
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75 because the Ethernet driver has been modified to be zero copy - the uip_buf
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76 variable is just a pointer to an Ethernet buffer, and not a buffer in its own
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78 extern unsigned char *uip_buf;
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80 /* The ARP timer and the periodic timer share a callback function, so the
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81 respective timer IDs are used to determine which timer actually expired. These
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82 constants are assigned to the timer IDs. */
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83 #define uipARP_TIMER 0
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84 #define uipPERIODIC_TIMER 1
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86 /* The length of the queue used to send events from timers or the Ethernet
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87 driver to the uIP stack. */
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88 #define uipEVENT_QUEUE_LENGTH 10
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90 /* A block time of zero simply means "don't block". */
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91 #define uipDONT_BLOCK 0UL
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93 /* How long to wait before attempting to connect the MAC again. */
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94 #define uipINIT_WAIT ( 100 / portTICK_RATE_MS )
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96 /* Shortcut to the header within the Rx buffer. */
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97 #define xHeader ((struct uip_eth_hdr *) &uip_buf[ 0 ])
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99 /* Standard constant. */
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100 #define uipTOTAL_FRAME_HEADER_SIZE 54
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102 /*-----------------------------------------------------------*/
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105 * Setup the MAC address in the MAC itself, and in the uIP stack.
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107 static void prvSetMACAddress( void );
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110 * Perform any uIP initialisation required to ready the stack for http
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113 static void prvInitialise_uIP( void );
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116 * The callback function that is assigned to both the periodic timer and the
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119 static void prvUIPTimerCallback( xTimerHandle xTimer );
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122 * Port functions required by the uIP stack.
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124 clock_time_t clock_time( void );
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126 /*-----------------------------------------------------------*/
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128 /* The queue used to send TCP/IP events to the uIP stack. */
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129 xQueueHandle xEMACEventQueue = NULL;
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131 /*-----------------------------------------------------------*/
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133 clock_time_t clock_time( void )
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135 return xTaskGetTickCount();
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137 /*-----------------------------------------------------------*/
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139 void vuIP_Task( void *pvParameters )
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142 unsigned long ulNewEvent = 0UL, ulUIP_Events = 0UL;
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143 unsigned short usPacketLength;
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145 /* Just to prevent compiler warnings about the unused parameter. */
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146 ( void ) pvParameters;
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148 /* Initialise the uIP stack, configuring for web server usage. */
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149 prvInitialise_uIP();
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151 /* Initialise the MAC and PHY. */
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156 /* Is there received data ready to be processed? */
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157 usPacketLength = usEMACRead();
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159 /* Statements to be executed if data has been received on the Ethernet. */
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160 if( ( usPacketLength > 0U ) && ( uip_buf != NULL ) )
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162 uip_len = usPacketLength;
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164 /* Standard uIP loop taken from the uIP manual. */
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165 if( xHeader->type == htons( UIP_ETHTYPE_IP ) )
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170 /* If the above function invocation resulted in data that
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171 should be sent out on the network, the global variable
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172 uip_len is set to a value > 0. */
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179 else if( xHeader->type == htons( UIP_ETHTYPE_ARP ) )
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183 /* If the above function invocation resulted in data that
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184 should be sent out on the network, the global variable
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185 uip_len is set to a value > 0. */
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194 /* Clear the RX event latched in ulUIP_Events - if one was latched. */
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195 ulUIP_Events &= ~uipETHERNET_RX_EVENT;
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198 /* Statements to be executed if the TCP/IP period timer has expired. */
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199 if( ( ulUIP_Events & uipPERIODIC_TIMER_EVENT ) != 0UL )
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201 ulUIP_Events &= ~uipPERIODIC_TIMER_EVENT;
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203 if( uip_buf != NULL )
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205 for( i = 0; i < UIP_CONNS; i++ )
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209 /* If the above function invocation resulted in data that
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210 should be sent out on the network, the global variable
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211 uip_len is set to a value > 0. */
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221 /* Statements to be executed if the ARP timer has expired. */
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222 if( ( ulUIP_Events & uipARP_TIMER_EVENT ) != 0 )
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224 ulUIP_Events &= ~uipARP_TIMER_EVENT;
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228 /* If all latched events have been cleared - block until another event
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230 if( ulUIP_Events == pdFALSE )
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232 xQueueReceive( xEMACEventQueue, &ulNewEvent, portMAX_DELAY );
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233 ulUIP_Events |= ulNewEvent;
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237 /*-----------------------------------------------------------*/
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239 static void prvSetMACAddress( void )
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241 struct uip_eth_addr xAddr;
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243 /* Configure the MAC address in the uIP stack. */
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244 xAddr.addr[ 0 ] = configMAC_ADDR0;
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245 xAddr.addr[ 1 ] = configMAC_ADDR1;
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246 xAddr.addr[ 2 ] = configMAC_ADDR2;
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247 xAddr.addr[ 3 ] = configMAC_ADDR3;
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248 xAddr.addr[ 4 ] = configMAC_ADDR4;
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249 xAddr.addr[ 5 ] = configMAC_ADDR5;
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250 uip_setethaddr( xAddr );
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252 /*-----------------------------------------------------------*/
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254 static void prvInitialise_uIP( void )
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256 uip_ipaddr_t xIPAddr;
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257 xTimerHandle xARPTimer, xPeriodicTimer;
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260 uip_ipaddr( &xIPAddr, configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 );
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261 uip_sethostaddr( &xIPAddr );
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262 uip_ipaddr( &xIPAddr, configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 );
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263 uip_setnetmask( &xIPAddr );
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264 prvSetMACAddress();
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267 /* Create the queue used to sent TCP/IP events to the uIP stack. */
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268 xEMACEventQueue = xQueueCreate( uipEVENT_QUEUE_LENGTH, sizeof( unsigned long ) );
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270 /* Create and start the uIP timers. */
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271 xARPTimer = xTimerCreate( ( signed char * ) "ARPTimer", /* Just a name that is helpful for debugging, not used by the kernel. */
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272 ( 10000UL / portTICK_RATE_MS ), /* Timer period. */
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273 pdTRUE, /* Autor-reload. */
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274 ( void * ) uipARP_TIMER,
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275 prvUIPTimerCallback
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278 xPeriodicTimer = xTimerCreate( ( signed char * ) "PeriodicTimer",
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279 ( 500UL / portTICK_RATE_MS ),
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280 pdTRUE, /* Autor-reload. */
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281 ( void * ) uipPERIODIC_TIMER,
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282 prvUIPTimerCallback
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285 /* Sanity check that the timers were indeed created. */
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286 configASSERT( xARPTimer );
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287 configASSERT( xPeriodicTimer );
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288 configASSERT( xEMACEventQueue );
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290 /* These commands will block indefinitely until they succeed, so there is
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291 no point in checking their return values. */
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292 xTimerStart( xARPTimer, portMAX_DELAY );
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293 xTimerStart( xPeriodicTimer, portMAX_DELAY );
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295 /*-----------------------------------------------------------*/
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297 static void prvUIPTimerCallback( xTimerHandle xTimer )
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299 static const unsigned long ulARPTimerExpired = uipARP_TIMER_EVENT;
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300 static const unsigned long ulPeriodicTimerExpired = uipPERIODIC_TIMER_EVENT;
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302 /* This is a time callback, so calls to xQueueSend() must not attempt to
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303 block. As this callback is assigned to both the ARP and Periodic timers, the
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304 first thing to do is ascertain which timer it was that actually expired. */
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305 switch( ( int ) pvTimerGetTimerID( xTimer ) )
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307 case uipARP_TIMER : xQueueSend( xEMACEventQueue, &ulARPTimerExpired, uipDONT_BLOCK );
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310 case uipPERIODIC_TIMER : xQueueSend( xEMACEventQueue, &ulPeriodicTimerExpired, uipDONT_BLOCK );
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313 default : /* Should not get here. */
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317 /*-----------------------------------------------------------*/
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319 void vApplicationProcessFormInput( char *pcInputString )
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323 /* Only interested in processing form input if this is the IO page. */
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324 c = strstr( pcInputString, "io.shtml" );
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328 /* Is there a command in the string? */
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329 c = strstr( pcInputString, "?" );
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332 /* Turn the LED's on or off in accordance with the check box status. */
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333 if( strstr( c, "LED0=1" ) != NULL )
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335 /* Turn the LEDs on. */
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336 vParTestSetLED( 3, 1 );
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337 vParTestSetLED( 4, 1 );
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341 /* Turn the LEDs off. */
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342 vParTestSetLED( 3, 0 );
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343 vParTestSetLED( 4, 0 );
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348 /* Commands to turn LEDs off are not always explicit. */
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349 vParTestSetLED( 3, 0 );
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350 vParTestSetLED( 4, 0 );
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354 /*-----------------------------------------------------------*/
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