2 * FreeRTOS+UDP V1.0.4
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3 * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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6 * this software and associated documentation files (the "Software"), to deal in
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7 * the Software without restriction, including without limitation the rights to
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8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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9 * the Software, and to permit persons to whom the Software is furnished to do so,
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10 * subject to the following conditions:
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12 * The above copyright notice and this permission notice shall be included in all
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13 * copies or substantial portions of the Software. If you wish to use our Amazon
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14 * FreeRTOS name, please do so in a fair use way that does not cause confusion.
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16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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18 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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19 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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20 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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23 * http://www.FreeRTOS.org
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24 * http://aws.amazon.com/freertos
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26 * 1 tab == 4 spaces!
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29 /* Standard includes. */
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32 /* FreeRTOS includes. */
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33 #include "FreeRTOS.h"
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38 /* FreeRTOS+UDP includes. */
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39 #include "FreeRTOS_UDP_IP.h"
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40 #include "FreeRTOS_IP_Private.h"
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41 #include "FreeRTOS_Sockets.h"
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42 #include "NetworkBufferManagement.h"
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44 /* Hardware includes. */
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45 #include "hwEthernet.h"
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47 /* Demo includes. */
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48 #include "NetworkInterface.h"
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50 #if ipconfigETHERNET_DRIVER_FILTERS_FRAME_TYPES != 1
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51 #define ipCONSIDER_FRAME_FOR_PROCESSING( pucEthernetBuffer ) eProcessBuffer
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53 #define ipCONSIDER_FRAME_FOR_PROCESSING( pucEthernetBuffer ) eConsiderFrameForProcessing( ( pucEthernetBuffer ) )
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56 /* When a packet is ready to be sent, if it cannot be sent immediately then the
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57 task performing the transmit will block for niTX_BUFFER_FREE_WAIT
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58 milliseconds. It will do this a maximum of niMAX_TX_ATTEMPTS before giving
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60 #define niTX_BUFFER_FREE_WAIT ( ( TickType_t ) 2UL / portTICK_RATE_MS )
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61 #define niMAX_TX_ATTEMPTS ( 5 )
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63 /* The length of the queue used to send interrupt status words from the
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64 interrupt handler to the deferred handler task. */
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65 #define niINTERRUPT_QUEUE_LENGTH ( 10 )
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67 /*-----------------------------------------------------------*/
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70 * A deferred interrupt handler task that processes
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72 extern void vEMACHandlerTask( void *pvParameters );
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74 /*-----------------------------------------------------------*/
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76 /* The queue used to communicate Ethernet events with the IP task. */
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77 extern xQueueHandle xNetworkEventQueue;
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79 /* The semaphore used to wake the deferred interrupt handler task when an Rx
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80 interrupt is received. */
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81 xSemaphoreHandle xEMACRxEventSemaphore = NULL;
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82 /*-----------------------------------------------------------*/
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84 BaseType_t xNetworkInterfaceInitialise( void )
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86 BaseType_t xStatus, xReturn;
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87 extern uint8_t ucMACAddress[ 6 ];
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89 /* Initialise the MAC. */
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92 while( lEMACWaitForLink() != pdPASS )
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97 vSemaphoreCreateBinary( xEMACRxEventSemaphore );
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98 configASSERT( xEMACRxEventSemaphore );
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100 /* The handler task is created at the highest possible priority to
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101 ensure the interrupt handler can return directly to it. */
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102 xTaskCreate( vEMACHandlerTask, "EMAC", configMINIMAL_STACK_SIZE, NULL, configMAX_PRIORITIES - 1, NULL );
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107 /*-----------------------------------------------------------*/
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109 BaseType_t xNetworkInterfaceOutput( xNetworkBufferDescriptor_t * const pxNetworkBuffer )
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111 extern void vEMACCopyWrite( uint8_t * pucBuffer, uint16_t usLength );
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113 vEMACCopyWrite( pxNetworkBuffer->pucEthernetBuffer, pxNetworkBuffer->xDataLength );
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115 /* Finished with the network buffer. */
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116 vNetworkBufferRelease( pxNetworkBuffer );
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120 /*-----------------------------------------------------------*/
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