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 it can 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 /* Standard includes. */
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78 /* Scheduler includes. */
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79 #include "FreeRTOS.h"
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85 #include "net/uip.h"
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86 #include "net/uip_arp.h"
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87 #include "apps/httpd/httpd.h"
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88 #include "sys/timer.h"
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89 #include "net/clock-arch.h"
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91 /* Demo includes. */
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92 #include "ParTest.h"
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94 /* Hardware driver includes. */
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95 #include "mss_ethernet_mac_regs.h"
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96 #include "mss_ethernet_mac.h"
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98 /* The buffer used by the uIP stack to both receive and send. In this case,
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99 because the Ethernet driver has been modified to be zero copy - the uip_buf
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100 variable is just a pointer to an Ethernet buffer, and not a buffer in its own
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102 extern unsigned char *uip_buf;
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104 /* The ARP timer and the periodic timer share a callback function, so the
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105 respective timer IDs are used to determine which timer actually expired. These
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106 constants are assigned to the timer IDs. */
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107 #define uipARP_TIMER 0
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108 #define uipPERIODIC_TIMER 1
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110 /* The length of the queue used to send events from timers or the Ethernet
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111 driver to the uIP stack. */
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112 #define uipEVENT_QUEUE_LENGTH 10
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114 /* A block time of zero simply means "don't block". */
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115 #define uipDONT_BLOCK 0UL
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117 /* How long to wait before attempting to connect the MAC again. */
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118 #define uipINIT_WAIT ( 100 / portTICK_RATE_MS )
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120 /* Shortcut to the header within the Rx buffer. */
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121 #define xHeader ((struct uip_eth_hdr *) &uip_buf[ 0 ])
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123 /* Standard constant. */
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124 #define uipTOTAL_FRAME_HEADER_SIZE 54
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126 /*-----------------------------------------------------------*/
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129 * Setup the MAC address in the MAC itself, and in the uIP stack.
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131 static void prvSetMACAddress( void );
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134 * Perform any uIP initialisation required to ready the stack for http
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137 static void prvInitialise_uIP( void );
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140 * Handles Ethernet interrupt events.
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142 static void prvEMACEventListener( unsigned long ulISREvents );
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145 * The callback function that is assigned to both the periodic timer and the
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148 static void prvUIPTimerCallback( xTimerHandle xTimer );
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151 * Initialise the MAC hardware.
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153 static void prvInitEmac( void );
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156 * Write data to the Ethener. Note that this actually writes data twice for the
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157 * to get around delayed ack issues when communicating with a non real-time
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158 * peer (for example, a Windows machine).
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160 void vEMACWrite( void );
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163 * Port functions required by the uIP stack.
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165 clock_time_t clock_time( void );
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167 /*-----------------------------------------------------------*/
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169 /* The queue used to send TCP/IP events to the uIP stack. */
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170 xQueueHandle xEMACEventQueue = NULL;
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172 /*-----------------------------------------------------------*/
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174 clock_time_t clock_time( void )
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176 return xTaskGetTickCount();
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178 /*-----------------------------------------------------------*/
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180 void vuIP_Task( void *pvParameters )
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183 unsigned long ulNewEvent = 0UL, ulUIP_Events = 0UL;
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184 long lPacketLength;
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186 /* Just to prevent compiler warnings about the unused parameter. */
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187 ( void ) pvParameters;
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189 /* Initialise the uIP stack, configuring for web server usage. */
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190 prvInitialise_uIP();
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192 /* Initialise the MAC and PHY. */
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197 /* Is there received data ready to be processed? */
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198 lPacketLength = MSS_MAC_rx_packet();
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200 /* Statements to be executed if data has been received on the Ethernet. */
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201 if( ( lPacketLength > 0 ) && ( uip_buf != NULL ) )
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203 uip_len = ( u16_t ) lPacketLength;
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205 /* Standard uIP loop taken from the uIP manual. */
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206 if( xHeader->type == htons( UIP_ETHTYPE_IP ) )
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211 /* If the above function invocation resulted in data that
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212 should be sent out on the network, the global variable
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213 uip_len is set to a value > 0. */
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220 else if( xHeader->type == htons( UIP_ETHTYPE_ARP ) )
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224 /* If the above function invocation resulted in data that
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225 should be sent out on the network, the global variable
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226 uip_len is set to a value > 0. */
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235 /* Clear the RX event latched in ulUIP_Events - if one was latched. */
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236 ulUIP_Events &= ~uipETHERNET_RX_EVENT;
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239 /* Statements to be executed if the TCP/IP period timer has expired. */
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240 if( ( ulUIP_Events & uipPERIODIC_TIMER_EVENT ) != 0UL )
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242 ulUIP_Events &= ~uipPERIODIC_TIMER_EVENT;
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244 if( uip_buf != NULL )
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246 for( i = 0; i < UIP_CONNS; i++ )
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250 /* If the above function invocation resulted in data that
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251 should be sent out on the network, the global variable
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252 uip_len is set to a value > 0. */
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262 /* Statements to be executed if the ARP timer has expired. */
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263 if( ( ulUIP_Events & uipARP_TIMER_EVENT ) != 0 )
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265 ulUIP_Events &= ~uipARP_TIMER_EVENT;
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269 /* If all latched events have been cleared - block until another event
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271 if( ulUIP_Events == pdFALSE )
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273 xQueueReceive( xEMACEventQueue, &ulNewEvent, portMAX_DELAY );
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274 ulUIP_Events |= ulNewEvent;
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278 /*-----------------------------------------------------------*/
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280 static void prvSetMACAddress( void )
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282 struct uip_eth_addr xAddr;
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284 /* Configure the MAC address in the uIP stack. */
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285 xAddr.addr[ 0 ] = configMAC_ADDR0;
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286 xAddr.addr[ 1 ] = configMAC_ADDR1;
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287 xAddr.addr[ 2 ] = configMAC_ADDR2;
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288 xAddr.addr[ 3 ] = configMAC_ADDR3;
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289 xAddr.addr[ 4 ] = configMAC_ADDR4;
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290 xAddr.addr[ 5 ] = configMAC_ADDR5;
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291 uip_setethaddr( xAddr );
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293 /*-----------------------------------------------------------*/
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295 static void prvInitialise_uIP( void )
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297 uip_ipaddr_t xIPAddr;
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298 xTimerHandle xARPTimer, xPeriodicTimer;
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301 uip_ipaddr( &xIPAddr, configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 );
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302 uip_sethostaddr( &xIPAddr );
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303 uip_ipaddr( &xIPAddr, configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 );
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304 uip_setnetmask( &xIPAddr );
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305 prvSetMACAddress();
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308 /* Create the queue used to sent TCP/IP events to the uIP stack. */
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309 xEMACEventQueue = xQueueCreate( uipEVENT_QUEUE_LENGTH, sizeof( unsigned long ) );
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311 /* Create and start the uIP timers. */
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312 xARPTimer = xTimerCreate( ( signed char * ) "ARPTimer", /* Just a name that is helpful for debugging, not used by the kernel. */
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313 ( 10000UL / portTICK_RATE_MS ), /* Timer period. */
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314 pdTRUE, /* Autor-reload. */
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315 ( void * ) uipARP_TIMER,
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316 prvUIPTimerCallback
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319 xPeriodicTimer = xTimerCreate( ( signed char * ) "PeriodicTimer",
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320 ( 500UL / portTICK_RATE_MS ),
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321 pdTRUE, /* Autor-reload. */
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322 ( void * ) uipPERIODIC_TIMER,
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323 prvUIPTimerCallback
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326 /* Sanity check that the timers were indeed created. */
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327 configASSERT( xARPTimer );
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328 configASSERT( xPeriodicTimer );
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330 /* These commands will block indefinitely until they succeed, so there is
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331 no point in checking their return values. */
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332 xTimerStart( xARPTimer, portMAX_DELAY );
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333 xTimerStart( xPeriodicTimer, portMAX_DELAY );
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335 /*-----------------------------------------------------------*/
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337 static void prvEMACEventListener( unsigned long ulISREvents )
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339 long lHigherPriorityTaskWoken = pdFALSE;
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340 const unsigned long ulRxEvent = uipETHERNET_RX_EVENT;
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342 /* Sanity check that the event queue was indeed created. */
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343 configASSERT( xEMACEventQueue );
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345 if( ( ulISREvents & MSS_MAC_EVENT_PACKET_SEND ) != 0UL )
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347 /* An Ethernet Tx event has occurred. */
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348 MSS_MAC_FreeTxBuffers();
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351 if( ( ulISREvents & MSS_MAC_EVENT_PACKET_RECEIVED ) != 0UL )
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353 /* An Ethernet Rx event has occurred. */
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354 xQueueSendFromISR( xEMACEventQueue, &ulRxEvent, &lHigherPriorityTaskWoken );
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357 portEND_SWITCHING_ISR( lHigherPriorityTaskWoken );
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359 /*-----------------------------------------------------------*/
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361 static void prvInitEmac( void )
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363 const unsigned char ucPHYAddress = 1;
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365 /* Initialise the MAC and PHY hardware. */
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366 MSS_MAC_init( ucPHYAddress );
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368 /* Register the event listener. The Ethernet interrupt handler will call
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369 this listener whenever an Rx or a Tx interrupt occurs. */
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370 MSS_MAC_set_callback( ( MSS_MAC_callback_t ) prvEMACEventListener );
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372 /* Setup the EMAC and the NVIC for MAC interrupts. */
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373 NVIC_SetPriority( EthernetMAC_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
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374 NVIC_EnableIRQ( EthernetMAC_IRQn );
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376 /*-----------------------------------------------------------*/
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378 void vEMACWrite( void )
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380 const long lMaxAttempts = 10;
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382 const portTickType xShortDelay = ( 5 / portTICK_RATE_MS );
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384 /* Try to send data to the Ethernet. Keep trying for a while if data cannot
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385 be sent immediately. Note that this will actually cause the data to be sent
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386 twice to get around delayed ACK problems when communicating with non real-
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387 time TCP/IP stacks (such as a Windows machine). */
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388 for( lAttempt = 0; lAttempt < lMaxAttempts; lAttempt++ )
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390 if( MSS_MAC_tx_packet( uip_len ) != 0 )
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396 vTaskDelay( xShortDelay );
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400 /*-----------------------------------------------------------*/
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402 static void prvUIPTimerCallback( xTimerHandle xTimer )
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404 static const unsigned long ulARPTimerExpired = uipARP_TIMER_EVENT;
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405 static const unsigned long ulPeriodicTimerExpired = uipPERIODIC_TIMER_EVENT;
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407 /* This is a time callback, so calls to xQueueSend() must not attempt to
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408 block. As this callback is assigned to both the ARP and Periodic timers, the
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409 first thing to do is ascertain which timer it was that actually expired. */
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410 switch( ( int ) pvTimerGetTimerID( xTimer ) )
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412 case uipARP_TIMER : xQueueSend( xEMACEventQueue, &ulARPTimerExpired, uipDONT_BLOCK );
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415 case uipPERIODIC_TIMER : xQueueSend( xEMACEventQueue, &ulPeriodicTimerExpired, uipDONT_BLOCK );
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418 default : /* Should not get here. */
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422 /*-----------------------------------------------------------*/
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424 void vApplicationProcessFormInput( char *pcInputString )
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428 /* Only interested in processing form input if this is the IO page. */
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429 c = strstr( pcInputString, "io.shtml" );
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433 /* Is there a command in the string? */
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434 c = strstr( pcInputString, "?" );
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437 /* Turn the LED's on or off in accordance with the check box status. */
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438 if( strstr( c, "LED0=1" ) != NULL )
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440 /* Turn the LEDs on. */
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441 vParTestSetLED( 3, 1 );
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442 vParTestSetLED( 4, 1 );
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446 /* Turn the LEDs off. */
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447 vParTestSetLED( 3, 0 );
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448 vParTestSetLED( 4, 0 );
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453 /* Commands to turn LEDs off are not always explicit. */
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454 vParTestSetLED( 3, 0 );
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455 vParTestSetLED( 4, 0 );
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459 /*-----------------------------------------------------------*/
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