2 FreeRTOS V7.4.1 - 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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74 /* Standard includes. */
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77 /* Library includes. */
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78 #include "91x_lib.h"
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79 #include "91x_enet.h"
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81 /* Scheduler includes. */
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82 #include "FreeRTOS.h"
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88 #include "uip_arp.h"
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91 #include "clock-arch.h"
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93 /*-----------------------------------------------------------*/
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95 /* MAC address configuration. */
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96 #define uipMAC_ADDR0 0x00
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97 #define uipMAC_ADDR1 0x12
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98 #define uipMAC_ADDR2 0x13
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99 #define uipMAC_ADDR3 0x14
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100 #define uipMAC_ADDR4 0x15
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101 #define uipMAC_ADDR5 0x20
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103 /* IP address configuration. */
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104 #define uipIP_ADDR0 172
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105 #define uipIP_ADDR1 25
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106 #define uipIP_ADDR2 218
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107 #define uipIP_ADDR3 11
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109 /* Netmask configuration. */
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110 #define uipNET_MASK0 255
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111 #define uipNET_MASK1 255
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112 #define uipNET_MASK2 255
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113 #define uipNET_MASK3 0
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115 /* Gateway address configuration. */
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116 #define uipGATEWAY_ADDR0 172
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117 #define uipGATEWAY_ADDR1 25
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118 #define uipGATEWAY_ADDR2 218
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119 #define uipGATEWAY_ADDR3 1
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121 /* Shortcut to the header within the Rx buffer. */
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122 #define xHeader ((struct uip_eth_hdr *) &uip_buf[ 0 ])
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124 /* uIP update frequencies. */
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125 #define uipMAX_BLOCK_TIME (configTICK_RATE_HZ / 4)
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127 /* Interrupt status bit definition. */
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128 #define uipDMI_RX_CURRENT_DONE 0x8000
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130 /* If no buffers are available, then wait this long before looking again. */
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131 #define uipBUFFER_WAIT_DELAY ( 10 / portTICK_RATE_MS )
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132 #define uipBUFFER_WAIT_ATTEMPTS ( 10 )
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134 /* Standard constant. */
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135 #define uipTOTAL_FRAME_HEADER_SIZE 54
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137 /*-----------------------------------------------------------*/
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140 * Send the uIP buffer to the MAC.
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142 static void prvENET_Send(void);
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145 * Setup the MAC address in the MAC itself, and in the uIP stack.
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147 static void prvSetMACAddress( void );
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150 * Used to return a pointer to the next buffer to be used.
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152 extern unsigned char *pcGetNextBuffer( void );
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155 * Port functions required by the uIP stack.
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157 void clock_init( void );
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158 clock_time_t clock_time( void );
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160 /*-----------------------------------------------------------*/
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162 /* The semaphore used by the ISR to wake the uIP task. */
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163 xSemaphoreHandle xSemaphore = NULL;
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165 /*-----------------------------------------------------------*/
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167 void clock_init(void)
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169 /* This is done when the scheduler starts. */
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171 /*-----------------------------------------------------------*/
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173 clock_time_t clock_time( void )
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175 return xTaskGetTickCount();
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177 /*-----------------------------------------------------------*/
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179 void vuIP_Task( void *pvParameters )
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182 uip_ipaddr_t xIPAddr;
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183 struct timer periodic_timer, arp_timer;
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185 /* Create the semaphore used by the ISR to wake this task. */
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186 vSemaphoreCreateBinary( xSemaphore );
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188 /* Initialise the uIP stack. */
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189 timer_set( &periodic_timer, configTICK_RATE_HZ / 2 );
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190 timer_set( &arp_timer, configTICK_RATE_HZ * 10 );
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192 uip_ipaddr( xIPAddr, uipIP_ADDR0, uipIP_ADDR1, uipIP_ADDR2, uipIP_ADDR3 );
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193 uip_sethostaddr( xIPAddr );
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194 uip_ipaddr( xIPAddr, uipNET_MASK0, uipNET_MASK1, uipNET_MASK2, uipNET_MASK3 );
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195 uip_setnetmask( xIPAddr );
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196 uip_ipaddr( xIPAddr, uipGATEWAY_ADDR0, uipGATEWAY_ADDR1, uipGATEWAY_ADDR2, uipGATEWAY_ADDR3 );
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197 uip_setdraddr( xIPAddr );
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200 /* Initialise the MAC. */
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201 ENET_InitClocksGPIO();
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203 portENTER_CRITICAL();
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206 prvSetMACAddress();
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207 VIC_Config( ENET_ITLine, VIC_IRQ, 1 );
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208 VIC_ITCmd( ENET_ITLine, ENABLE );
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209 ENET_DMA->ISR = uipDMI_RX_CURRENT_DONE;
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210 ENET_DMA->IER = uipDMI_RX_CURRENT_DONE;
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212 portEXIT_CRITICAL();
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217 /* Is there received data ready to be processed? */
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218 uip_len = ENET_HandleRxPkt( uip_buf );
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222 /* Standard uIP loop taken from the uIP manual. */
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223 if( xHeader->type == htons( UIP_ETHTYPE_IP ) )
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228 /* If the above function invocation resulted in data that
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229 should be sent out on the network, the global variable
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230 uip_len is set to a value > 0. */
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237 else if( xHeader->type == htons( UIP_ETHTYPE_ARP ) )
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241 /* If the above function invocation resulted in data that
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242 should be sent out on the network, the global variable
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243 uip_len is set to a value > 0. */
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252 if( timer_expired( &periodic_timer ) )
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254 timer_reset( &periodic_timer );
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255 for( i = 0; i < UIP_CONNS; i++ )
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259 /* If the above function invocation resulted in data that
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260 should be sent out on the network, the global variable
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261 uip_len is set to a value > 0. */
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269 /* Call the ARP timer function every 10 seconds. */
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270 if( timer_expired( &arp_timer ) )
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272 timer_reset( &arp_timer );
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278 /* We did not receive a packet, and there was no periodic
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279 processing to perform. Block for a fixed period. If a packet
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280 is received during this period we will be woken by the ISR
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281 giving us the Semaphore. */
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282 xSemaphoreTake( xSemaphore, configTICK_RATE_HZ / 2 );
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287 /*-----------------------------------------------------------*/
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289 static void prvENET_Send(void)
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292 static unsigned char *pcTxData;
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294 /* Get a DMA buffer into which we can write the data to send. */
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295 for( i = 0; i < uipBUFFER_WAIT_ATTEMPTS; i++ )
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297 pcTxData = pcGetNextBuffer();
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305 vTaskDelay( uipBUFFER_WAIT_DELAY );
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311 /* Copy the header into the Tx buffer. */
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312 memcpy( ( void * ) pcTxData, ( void * ) uip_buf, uipTOTAL_FRAME_HEADER_SIZE );
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313 if( uip_len > uipTOTAL_FRAME_HEADER_SIZE )
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315 memcpy( ( void * ) &( pcTxData[ uipTOTAL_FRAME_HEADER_SIZE ] ), ( void * ) uip_appdata, ( uip_len - uipTOTAL_FRAME_HEADER_SIZE ) );
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318 ENET_TxPkt( &pcTxData, uip_len );
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321 /*-----------------------------------------------------------*/
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323 void ENET_IRQHandler(void)
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325 portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
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327 /* Give the semaphore in case the uIP task needs waking. */
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328 xSemaphoreGiveFromISR( xSemaphore, &xHigherPriorityTaskWoken );
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330 /* Clear the interrupt. */
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331 ENET_DMA->ISR = uipDMI_RX_CURRENT_DONE;
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333 /* Switch tasks if necessary. */
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334 portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
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336 /*-----------------------------------------------------------*/
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338 static void prvSetMACAddress( void )
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340 struct uip_eth_addr xAddr;
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342 /* Configure the MAC address in the uIP stack. */
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343 xAddr.addr[ 0 ] = uipMAC_ADDR0;
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344 xAddr.addr[ 1 ] = uipMAC_ADDR1;
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345 xAddr.addr[ 2 ] = uipMAC_ADDR2;
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346 xAddr.addr[ 3 ] = uipMAC_ADDR3;
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347 xAddr.addr[ 4 ] = uipMAC_ADDR4;
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348 xAddr.addr[ 5 ] = uipMAC_ADDR5;
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349 uip_setethaddr( xAddr );
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351 /* Write the MAC address to the MAC. */
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352 ENET_MAC->MAL = ( uipMAC_ADDR3 << 24 ) | ( uipMAC_ADDR2 << 16 ) | ( uipMAC_ADDR1 << 8 ) | ( uipMAC_ADDR0 );
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353 ENET_MAC->MAH = ( uipMAC_ADDR5 << 8 ) | ( uipMAC_ADDR4 );
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