--- /dev/null
+/*\r
+FreeRTOS+TCP V2.0.11\r
+Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\r
+\r
+Permission is hereby granted, free of charge, to any person obtaining a copy of\r
+this software and associated documentation files (the "Software"), to deal in\r
+the Software without restriction, including without limitation the rights to\r
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of\r
+the Software, and to permit persons to whom the Software is furnished to do so,\r
+subject to the following conditions:\r
+\r
+The above copyright notice and this permission notice shall be included in all\r
+copies or substantial portions of the Software.\r
+\r
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS\r
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR\r
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
+\r
+ http://aws.amazon.com/freertos\r
+ http://www.FreeRTOS.org\r
+*/\r
+\r
+/* Standard includes. */\r
+#include <stdint.h>\r
+\r
+/* FreeRTOS includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+#include "queue.h"\r
+#include "semphr.h"\r
+\r
+/* FreeRTOS+TCP includes. */\r
+#include "FreeRTOS_UDP_IP.h"\r
+#include "FreeRTOS_Sockets.h"\r
+#include "NetworkBufferManagement.h"\r
+\r
+/* Hardware includes. */\r
+#include "hwEthernet.h"\r
+\r
+/* Demo includes. */\r
+#include "NetworkInterface.h"\r
+\r
+#if ipconfigETHERNET_DRIVER_FILTERS_FRAME_TYPES != 1\r
+ #define ipCONSIDER_FRAME_FOR_PROCESSING( pucEthernetBuffer ) eProcessBuffer\r
+#else\r
+ #define ipCONSIDER_FRAME_FOR_PROCESSING( pucEthernetBuffer ) eConsiderFrameForProcessing( ( pucEthernetBuffer ) )\r
+#endif\r
+\r
+/* When a packet is ready to be sent, if it cannot be sent immediately then the\r
+task performing the transmit will block for niTX_BUFFER_FREE_WAIT\r
+milliseconds. It will do this a maximum of niMAX_TX_ATTEMPTS before giving\r
+up. */\r
+#define niTX_BUFFER_FREE_WAIT ( ( TickType_t ) 2UL / portTICK_PERIOD_MS )\r
+#define niMAX_TX_ATTEMPTS ( 5 )\r
+\r
+/* The length of the queue used to send interrupt status words from the\r
+interrupt handler to the deferred handler task. */\r
+#define niINTERRUPT_QUEUE_LENGTH ( 10 )\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+/*\r
+ * A deferred interrupt handler task that processes\r
+ */\r
+extern void vEMACHandlerTask( void *pvParameters );\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+/* The queue used to communicate Ethernet events with the IP task. */\r
+extern QueueHandle_t xNetworkEventQueue;\r
+\r
+/* The semaphore used to wake the deferred interrupt handler task when an Rx\r
+interrupt is received. */\r
+SemaphoreHandle_t xEMACRxEventSemaphore = NULL;\r
+/*-----------------------------------------------------------*/\r
+\r
+BaseType_t xNetworkInterfaceInitialise( void )\r
+{\r
+BaseType_t xStatus, xReturn;\r
+extern uint8_t ucMACAddress[ 6 ];\r
+\r
+ /* Initialise the MAC. */\r
+ vInitEmac();\r
+\r
+ while( lEMACWaitForLink() != pdPASS )\r
+ {\r
+ vTaskDelay( 20 );\r
+ }\r
+\r
+ vSemaphoreCreateBinary( xEMACRxEventSemaphore );\r
+ configASSERT( xEMACRxEventSemaphore );\r
+\r
+ /* The handler task is created at the highest possible priority to\r
+ ensure the interrupt handler can return directly to it. */\r
+ xTaskCreate( vEMACHandlerTask, "EMAC", configMINIMAL_STACK_SIZE, NULL, configMAX_PRIORITIES - 1, NULL );\r
+ xReturn = pdPASS;\r
+\r
+ return xReturn;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+BaseType_t xNetworkInterfaceOutput( NetworkBufferDescriptor_t * const pxNetworkBuffer )\r
+{\r
+extern void vEMACCopyWrite( uint8_t * pucBuffer, uint16_t usLength );\r
+\r
+ vEMACCopyWrite( pxNetworkBuffer->pucBuffer, pxNetworkBuffer->xDataLength );\r
+\r
+ /* Finished with the network buffer. */\r
+ vReleaseNetworkBufferAndDescriptor( pxNetworkBuffer );\r
+\r
+ return pdTRUE;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+\r