2 FreeRTOS V8.2.0rc1 - Copyright (C) 2014 Real Time Engineers Ltd.
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5 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 This file is part of the FreeRTOS distribution.
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9 FreeRTOS is free software; you can redistribute it and/or modify it under
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10 the terms of the GNU General Public License (version 2) as published by the
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11 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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13 >>! NOTE: The modification to the GPL is included to allow you to !<<
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14 >>! distribute a combined work that includes FreeRTOS without being !<<
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15 >>! obliged to provide the source code for proprietary components !<<
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16 >>! outside of the FreeRTOS kernel. !<<
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18 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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19 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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20 FOR A PARTICULAR PURPOSE. Full license text is available on the following
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21 link: http://www.freertos.org/a00114.html
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25 ***************************************************************************
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27 * Having a problem? Start by reading the FAQ "My application does *
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28 * not run, what could be wrong?". Have you defined configASSERT()? *
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30 * http://www.FreeRTOS.org/FAQHelp.html *
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32 ***************************************************************************
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34 ***************************************************************************
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36 * FreeRTOS provides completely free yet professionally developed, *
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37 * robust, strictly quality controlled, supported, and cross *
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38 * platform software that is more than just the market leader, it *
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39 * is the industry's de facto standard. *
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41 * Help yourself get started quickly while simultaneously helping *
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42 * to support the FreeRTOS project by purchasing a FreeRTOS *
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43 * tutorial book, reference manual, or both: *
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44 * http://www.FreeRTOS.org/Documentation *
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46 ***************************************************************************
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48 ***************************************************************************
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50 * Investing in training allows your team to be as productive as *
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51 * possible as early as possible, lowering your overall development *
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52 * cost, and enabling you to bring a more robust product to market *
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53 * earlier than would otherwise be possible. Richard Barry is both *
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54 * the architect and key author of FreeRTOS, and so also the world's *
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55 * leading authority on what is the world's most popular real time *
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56 * kernel for deeply embedded MCU designs. Obtaining your training *
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57 * from Richard ensures your team will gain directly from his in-depth *
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58 * product knowledge and years of usage experience. Contact Real Time *
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59 * Engineers Ltd to enquire about the FreeRTOS Masterclass, presented *
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60 * by Richard Barry: http://www.FreeRTOS.org/contact
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62 ***************************************************************************
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64 ***************************************************************************
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66 * You are receiving this top quality software for free. Please play *
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67 * fair and reciprocate by reporting any suspected issues and *
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68 * participating in the community forum: *
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69 * http://www.FreeRTOS.org/support *
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73 ***************************************************************************
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75 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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76 license and Real Time Engineers Ltd. contact details.
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78 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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79 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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80 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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82 http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
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83 Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
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85 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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86 Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
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87 licenses offer ticketed support, indemnification and commercial middleware.
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89 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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90 engineered and independently SIL3 certified version for use in safety and
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91 mission critical applications that require provable dependability.
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96 /* Standard includes. */
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99 /* Scheduler includes. */
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100 #include "FreeRTOS.h"
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103 #include "timers.h"
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105 /* uip includes. */
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106 #include "net/uip.h"
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107 #include "net/uip_arp.h"
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108 #include "apps/httpd/httpd.h"
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109 #include "sys/timer.h"
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110 #include "net/clock-arch.h"
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112 /* Demo includes. */
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113 #include "ParTest.h"
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115 /* Hardware driver includes. */
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116 #include "mss_ethernet_mac_regs.h"
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117 #include "mss_ethernet_mac.h"
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119 /* The buffer used by the uIP stack to both receive and send. In this case,
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120 because the Ethernet driver has been modified to be zero copy - the uip_buf
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121 variable is just a pointer to an Ethernet buffer, and not a buffer in its own
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123 extern unsigned char *uip_buf;
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125 /* The ARP timer and the periodic timer share a callback function, so the
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126 respective timer IDs are used to determine which timer actually expired. These
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127 constants are assigned to the timer IDs. */
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128 #define uipARP_TIMER 0
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129 #define uipPERIODIC_TIMER 1
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131 /* The length of the queue used to send events from timers or the Ethernet
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132 driver to the uIP stack. */
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133 #define uipEVENT_QUEUE_LENGTH 10
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135 /* A block time of zero simply means "don't block". */
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136 #define uipDONT_BLOCK 0UL
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138 /* How long to wait before attempting to connect the MAC again. */
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139 #define uipINIT_WAIT ( 100 / portTICK_PERIOD_MS )
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141 /* Shortcut to the header within the Rx buffer. */
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142 #define xHeader ((struct uip_eth_hdr *) &uip_buf[ 0 ])
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144 /* Standard constant. */
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145 #define uipTOTAL_FRAME_HEADER_SIZE 54
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147 /*-----------------------------------------------------------*/
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150 * Setup the MAC address in the MAC itself, and in the uIP stack.
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152 static void prvSetMACAddress( void );
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155 * Perform any uIP initialisation required to ready the stack for http
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158 static void prvInitialise_uIP( void );
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161 * Handles Ethernet interrupt events.
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163 static void prvEMACEventListener( unsigned long ulISREvents );
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166 * The callback function that is assigned to both the periodic timer and the
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169 static void prvUIPTimerCallback( TimerHandle_t xTimer );
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172 * Initialise the MAC hardware.
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174 static void prvInitEmac( void );
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177 * Write data to the Ethener. Note that this actually writes data twice for the
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178 * to get around delayed ack issues when communicating with a non real-time
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179 * peer (for example, a Windows machine).
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181 void vEMACWrite( void );
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184 * Port functions required by the uIP stack.
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186 clock_time_t clock_time( void );
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188 /*-----------------------------------------------------------*/
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190 /* The queue used to send TCP/IP events to the uIP stack. */
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191 QueueHandle_t xEMACEventQueue = NULL;
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193 /*-----------------------------------------------------------*/
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195 clock_time_t clock_time( void )
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197 return xTaskGetTickCount();
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199 /*-----------------------------------------------------------*/
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201 void vuIP_Task( void *pvParameters )
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204 unsigned long ulNewEvent = 0UL, ulUIP_Events = 0UL;
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205 long lPacketLength;
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207 /* Just to prevent compiler warnings about the unused parameter. */
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208 ( void ) pvParameters;
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210 /* Initialise the uIP stack, configuring for web server usage. */
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211 prvInitialise_uIP();
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213 /* Initialise the MAC and PHY. */
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218 /* Is there received data ready to be processed? */
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219 lPacketLength = MSS_MAC_rx_packet();
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221 /* Statements to be executed if data has been received on the Ethernet. */
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222 if( ( lPacketLength > 0 ) && ( uip_buf != NULL ) )
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224 uip_len = ( u16_t ) lPacketLength;
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226 /* Standard uIP loop taken from the uIP manual. */
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227 if( xHeader->type == htons( UIP_ETHTYPE_IP ) )
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232 /* If the above function invocation resulted in data that
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233 should be sent out on the network, the global variable
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234 uip_len is set to a value > 0. */
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241 else if( xHeader->type == htons( UIP_ETHTYPE_ARP ) )
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245 /* If the above function invocation resulted in data that
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246 should be sent out on the network, the global variable
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247 uip_len is set to a value > 0. */
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256 /* Clear the RX event latched in ulUIP_Events - if one was latched. */
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257 ulUIP_Events &= ~uipETHERNET_RX_EVENT;
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260 /* Statements to be executed if the TCP/IP period timer has expired. */
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261 if( ( ulUIP_Events & uipPERIODIC_TIMER_EVENT ) != 0UL )
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263 ulUIP_Events &= ~uipPERIODIC_TIMER_EVENT;
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265 if( uip_buf != NULL )
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267 for( i = 0; i < UIP_CONNS; i++ )
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271 /* If the above function invocation resulted in data that
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272 should be sent out on the network, the global variable
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273 uip_len is set to a value > 0. */
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283 /* Statements to be executed if the ARP timer has expired. */
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284 if( ( ulUIP_Events & uipARP_TIMER_EVENT ) != 0 )
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286 ulUIP_Events &= ~uipARP_TIMER_EVENT;
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290 /* If all latched events have been cleared - block until another event
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292 if( ulUIP_Events == pdFALSE )
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294 xQueueReceive( xEMACEventQueue, &ulNewEvent, portMAX_DELAY );
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295 ulUIP_Events |= ulNewEvent;
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299 /*-----------------------------------------------------------*/
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301 static void prvSetMACAddress( void )
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303 struct uip_eth_addr xAddr;
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305 /* Configure the MAC address in the uIP stack. */
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306 xAddr.addr[ 0 ] = configMAC_ADDR0;
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307 xAddr.addr[ 1 ] = configMAC_ADDR1;
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308 xAddr.addr[ 2 ] = configMAC_ADDR2;
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309 xAddr.addr[ 3 ] = configMAC_ADDR3;
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310 xAddr.addr[ 4 ] = configMAC_ADDR4;
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311 xAddr.addr[ 5 ] = configMAC_ADDR5;
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312 uip_setethaddr( xAddr );
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314 /*-----------------------------------------------------------*/
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316 static void prvInitialise_uIP( void )
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318 uip_ipaddr_t xIPAddr;
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319 TimerHandle_t xARPTimer, xPeriodicTimer;
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322 uip_ipaddr( &xIPAddr, configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 );
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323 uip_sethostaddr( &xIPAddr );
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324 uip_ipaddr( &xIPAddr, configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 );
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325 uip_setnetmask( &xIPAddr );
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326 prvSetMACAddress();
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329 /* Create the queue used to sent TCP/IP events to the uIP stack. */
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330 xEMACEventQueue = xQueueCreate( uipEVENT_QUEUE_LENGTH, sizeof( unsigned long ) );
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332 /* Create and start the uIP timers. */
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333 xARPTimer = xTimerCreate( "ARPTimer", /* Just a name that is helpful for debugging, not used by the kernel. */
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334 ( 10000UL / portTICK_PERIOD_MS ), /* Timer period. */
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335 pdTRUE, /* Autor-reload. */
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336 ( void * ) uipARP_TIMER,
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337 prvUIPTimerCallback
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340 xPeriodicTimer = xTimerCreate( "PeriodicTimer",
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341 ( 500UL / portTICK_PERIOD_MS ),
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342 pdTRUE, /* Autor-reload. */
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343 ( void * ) uipPERIODIC_TIMER,
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344 prvUIPTimerCallback
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347 /* Sanity check that the timers were indeed created. */
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348 configASSERT( xARPTimer );
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349 configASSERT( xPeriodicTimer );
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351 /* These commands will block indefinitely until they succeed, so there is
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352 no point in checking their return values. */
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353 xTimerStart( xARPTimer, portMAX_DELAY );
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354 xTimerStart( xPeriodicTimer, portMAX_DELAY );
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356 /*-----------------------------------------------------------*/
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358 static void prvEMACEventListener( unsigned long ulISREvents )
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360 long lHigherPriorityTaskWoken = pdFALSE;
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361 const unsigned long ulRxEvent = uipETHERNET_RX_EVENT;
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363 /* Sanity check that the event queue was indeed created. */
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364 configASSERT( xEMACEventQueue );
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366 if( ( ulISREvents & MSS_MAC_EVENT_PACKET_SEND ) != 0UL )
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368 /* An Ethernet Tx event has occurred. */
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369 MSS_MAC_FreeTxBuffers();
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372 if( ( ulISREvents & MSS_MAC_EVENT_PACKET_RECEIVED ) != 0UL )
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374 /* An Ethernet Rx event has occurred. */
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375 xQueueSendFromISR( xEMACEventQueue, &ulRxEvent, &lHigherPriorityTaskWoken );
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378 portEND_SWITCHING_ISR( lHigherPriorityTaskWoken );
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380 /*-----------------------------------------------------------*/
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382 static void prvInitEmac( void )
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384 const unsigned char ucPHYAddress = 1;
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386 /* Initialise the MAC and PHY hardware. */
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387 MSS_MAC_init( ucPHYAddress );
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389 /* Register the event listener. The Ethernet interrupt handler will call
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390 this listener whenever an Rx or a Tx interrupt occurs. */
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391 MSS_MAC_set_callback( ( MSS_MAC_callback_t ) prvEMACEventListener );
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393 /* Setup the EMAC and the NVIC for MAC interrupts. */
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394 NVIC_SetPriority( EthernetMAC_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
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395 NVIC_EnableIRQ( EthernetMAC_IRQn );
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397 /*-----------------------------------------------------------*/
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399 void vEMACWrite( void )
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401 const long lMaxAttempts = 10;
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403 const TickType_t xShortDelay = ( 5 / portTICK_PERIOD_MS );
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405 /* Try to send data to the Ethernet. Keep trying for a while if data cannot
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406 be sent immediately. Note that this will actually cause the data to be sent
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407 twice to get around delayed ACK problems when communicating with non real-
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408 time TCP/IP stacks (such as a Windows machine). */
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409 for( lAttempt = 0; lAttempt < lMaxAttempts; lAttempt++ )
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411 if( MSS_MAC_tx_packet( uip_len ) != 0 )
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417 vTaskDelay( xShortDelay );
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421 /*-----------------------------------------------------------*/
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423 static void prvUIPTimerCallback( TimerHandle_t xTimer )
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425 static const unsigned long ulARPTimerExpired = uipARP_TIMER_EVENT;
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426 static const unsigned long ulPeriodicTimerExpired = uipPERIODIC_TIMER_EVENT;
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428 /* This is a time callback, so calls to xQueueSend() must not attempt to
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429 block. As this callback is assigned to both the ARP and Periodic timers, the
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430 first thing to do is ascertain which timer it was that actually expired. */
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431 switch( ( int ) pvTimerGetTimerID( xTimer ) )
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433 case uipARP_TIMER : xQueueSend( xEMACEventQueue, &ulARPTimerExpired, uipDONT_BLOCK );
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436 case uipPERIODIC_TIMER : xQueueSend( xEMACEventQueue, &ulPeriodicTimerExpired, uipDONT_BLOCK );
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439 default : /* Should not get here. */
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443 /*-----------------------------------------------------------*/
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445 void vApplicationProcessFormInput( char *pcInputString )
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449 /* Only interested in processing form input if this is the IO page. */
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450 c = strstr( pcInputString, "io.shtml" );
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454 /* Is there a command in the string? */
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455 c = strstr( pcInputString, "?" );
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458 /* Turn the LED's on or off in accordance with the check box status. */
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459 if( strstr( c, "LED0=1" ) != NULL )
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461 /* Turn the LEDs on. */
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462 vParTestSetLED( 3, 1 );
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463 vParTestSetLED( 4, 1 );
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467 /* Turn the LEDs off. */
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468 vParTestSetLED( 3, 0 );
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469 vParTestSetLED( 4, 0 );
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474 /* Commands to turn LEDs off are not always explicit. */
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475 vParTestSetLED( 3, 0 );
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476 vParTestSetLED( 4, 0 );
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480 /*-----------------------------------------------------------*/
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