462 lines
14 KiB
C
462 lines
14 KiB
C
/**
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* @file
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* Ethernet Interface Skeleton
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*
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*/
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/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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/*
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* This file is a skeleton for developing Ethernet network interface
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* drivers for lwIP. Add code to the low_level functions and do a
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* search-and-replace for the word "ethernetif" to replace it with
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* something that better describes your network interface.
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*/
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#include "lwip/opt.h"
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#include "lwip/def.h"
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#include "lwip/mem.h"
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#include "lwip/pbuf.h"
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#include "lwip/timers.h"
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#include "netif/etharp.h"
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#include "lwip/err.h"
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#include "ethernetif.h"
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#include "rtthread.h"
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#include "stm32f4x7_eth.h"
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#include <string.h>
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#include "dev_flash.h"
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#define netifMTU (1500)
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#define netifINTERFACE_TASK_STACK_SIZE ( 1024 )
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#define netifINTERFACE_TASK_PRIORITY ( configMAX_PRIORITIES - 1 )
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#define netifGUARD_BLOCK_TIME ( 250 )
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/* The time to block waiting for input. */
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#define emacBLOCK_TIME_WAITING_FOR_INPUT ( ( portTickType ) 100 )
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/* Define those to better describe your network interface. */
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#define IFNAME0 's'
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#define IFNAME1 't'
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static struct netif *s_pxNetIf = NULL;
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static rt_sem_t s_xSemaphore = NULL;
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/* Ethernet Rx & Tx DMA Descriptors */
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extern ETH_DMADESCTypeDef DMARxDscrTab[ETH_RXBUFNB], DMATxDscrTab[ETH_TXBUFNB];
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/* Ethernet Receive buffers */
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extern uint8_t Rx_Buff[ETH_RXBUFNB][ETH_RX_BUF_SIZE];
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/* Ethernet Transmit buffers */
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extern uint8_t Tx_Buff[ETH_TXBUFNB][ETH_TX_BUF_SIZE];
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/* Global pointers to track current transmit and receive descriptors */
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extern ETH_DMADESCTypeDef *DMATxDescToSet;
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extern ETH_DMADESCTypeDef *DMARxDescToGet;
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/* Global pointer for last received frame infos */
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extern ETH_DMA_Rx_Frame_infos *DMA_RX_FRAME_infos;
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static void ethernetif_input( void * pvParameters );
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static void arp_timer(void *arg);
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/**
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* In this function, the hardware should be initialized.
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* Called from ethernetif_init().
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*
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* @param netif the already initialized lwip network interface structure
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* for this ethernetif
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*/
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static void low_level_init(struct netif *netif)
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{
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uint32_t i;
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/* set netif MAC hardware address length */
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netif->hwaddr_len = ETHARP_HWADDR_LEN;
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/* set netif MAC hardware address */
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const uint8_t *mac=sys_param()->mac;
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netif->hwaddr[0] = mac[0];
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netif->hwaddr[1] = mac[1];
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netif->hwaddr[2] = mac[2];
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netif->hwaddr[3] = mac[3];
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netif->hwaddr[4] = mac[4];
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netif->hwaddr[5] = mac[5];
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/* set netif maximum transfer unit */
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netif->mtu = 1500;
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/* Accept broadcast address and ARP traffic */
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netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
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s_pxNetIf =netif;
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/* create binary semaphore used for informing ethernetif of frame reception */
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if (s_xSemaphore == NULL)
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{
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//vSemaphoreCreateBinary(s_xSemaphore);
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s_xSemaphore=rt_sem_create("eth_recv",0,RT_IPC_FLAG_PRIO);
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//xSemaphoreTake( s_xSemaphore, 0);
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//rt_sem_take(s_xSemaphore,0);
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}
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/* initialize MAC address in ethernet MAC */
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ETH_MACAddressConfig(ETH_MAC_Address0, netif->hwaddr);
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/* Initialize Tx Descriptors list: Chain Mode */
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ETH_DMATxDescChainInit(DMATxDscrTab, &Tx_Buff[0][0], ETH_TXBUFNB);
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/* Initialize Rx Descriptors list: Chain Mode */
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ETH_DMARxDescChainInit(DMARxDscrTab, &Rx_Buff[0][0], ETH_RXBUFNB);
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/* Enable Ethernet Rx interrrupt */
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{
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for(i=0; i<ETH_RXBUFNB; i++)
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{
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ETH_DMARxDescReceiveITConfig(&DMARxDscrTab[i], ENABLE);
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}
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}
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#ifdef CHECKSUM_BY_HARDWARE
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/* Enable the checksum insertion for the Tx frames */
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{
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for(i=0; i<ETH_TXBUFNB; i++)
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{
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ETH_DMATxDescChecksumInsertionConfig(&DMATxDscrTab[i], ETH_DMATxDesc_ChecksumTCPUDPICMPFull);
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}
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}
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#endif
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/* create the task that handles the ETH_MAC */
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// xTaskCreate(ethernetif_input, (signed char*) "Eth_if", netifINTERFACE_TASK_STACK_SIZE, NULL,
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// netifINTERFACE_TASK_PRIORITY,NULL);
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rt_thread_t t= rt_thread_create("eth_recv_t",ethernetif_input,NULL,netifINTERFACE_TASK_STACK_SIZE,
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19,20);
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rt_thread_startup(t);
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/* Enable MAC and DMA transmission and reception */
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ETH_Start();
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}
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void ETH_IRQHandler(void)
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{
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rt_interrupt_enter();
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/* Frame received */
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if ( ETH_GetDMAFlagStatus(ETH_DMA_FLAG_R) == SET)
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{
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/* Give the semaphore to wakeup LwIP task */
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//xSemaphoreGiveFromISR( s_xSemaphore, &xHigherPriorityTaskWoken );
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if(s_xSemaphore!=NULL)
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{
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rt_sem_release(s_xSemaphore);
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}
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}
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/* Clear the interrupt flags. */
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/* Clear the Eth DMA Rx IT pending bits */
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ETH_DMAClearITPendingBit(ETH_DMA_IT_R);
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ETH_DMAClearITPendingBit(ETH_DMA_IT_NIS);
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rt_interrupt_leave();
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}
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/**
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* This function should do the actual transmission of the packet. The packet is
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* contained in the pbuf that is passed to the function. This pbuf
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* might be chained.
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*
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* @param netif the lwip network interface structure for this ethernetif
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* @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
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* @return ERR_OK if the packet could be sent
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* an err_t value if the packet couldn't be sent
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*
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* @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to
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* strange results. You might consider waiting for space in the DMA queue
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* to become availale since the stack doesn't retry to send a packet
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* dropped because of memory failure (except for the TCP timers).
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*/
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static err_t low_level_output(struct netif *netif, struct pbuf *p)
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{
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static rt_mutex_t xTxSemaphore = NULL;
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struct pbuf *q;
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u8 *buffer ;
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__IO ETH_DMADESCTypeDef *DmaTxDesc;
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uint16_t framelength = 0;
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uint32_t bufferoffset = 0;
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uint32_t byteslefttocopy = 0;
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uint32_t payloadoffset = 0;
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if (xTxSemaphore == NULL)
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{
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//vSemaphoreCreateBinary (xTxSemaphore);
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xTxSemaphore=rt_mutex_create("eth_out_mut",RT_IPC_FLAG_PRIO);
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}
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//if (xSemaphoreTake(xTxSemaphore, netifGUARD_BLOCK_TIME))
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if(rt_mutex_take(xTxSemaphore,RT_WAITING_FOREVER)==RT_EOK)
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{
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DmaTxDesc = DMATxDescToSet;
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buffer = (u8 *)(DmaTxDesc->Buffer1Addr);
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bufferoffset = 0;
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for(q = p; q != NULL; q = q->next)
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{
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if((DmaTxDesc->Status & ETH_DMATxDesc_OWN) != (u32)RESET)
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{
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goto error;
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}
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/* Get bytes in current lwIP buffer */
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byteslefttocopy = q->len;
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payloadoffset = 0;
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/* Check if the length of data to copy is bigger than Tx buffer size*/
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while( (byteslefttocopy + bufferoffset) > ETH_TX_BUF_SIZE )
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{
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/* Copy data to Tx buffer*/
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memcpy( (u8_t*)((u8_t*)buffer + bufferoffset), (u8_t*)((u8_t*)q->payload + payloadoffset), (ETH_TX_BUF_SIZE - bufferoffset) );
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/* Point to next descriptor */
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DmaTxDesc = (ETH_DMADESCTypeDef *)(DmaTxDesc->Buffer2NextDescAddr);
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/* Check if the buffer is available */
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if((DmaTxDesc->Status & ETH_DMATxDesc_OWN) != (u32)RESET)
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{
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goto error;
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}
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buffer = (u8 *)(DmaTxDesc->Buffer1Addr);
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byteslefttocopy = byteslefttocopy - (ETH_TX_BUF_SIZE - bufferoffset);
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payloadoffset = payloadoffset + (ETH_TX_BUF_SIZE - bufferoffset);
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framelength = framelength + (ETH_TX_BUF_SIZE - bufferoffset);
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bufferoffset = 0;
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}
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/* Copy the remaining bytes */
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memcpy( (u8_t*)((u8_t*)buffer + bufferoffset), (u8_t*)((u8_t*)q->payload + payloadoffset), byteslefttocopy );
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bufferoffset = bufferoffset + byteslefttocopy;
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framelength = framelength + byteslefttocopy;
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}
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/* Prepare transmit descriptors to give to DMA*/
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ETH_Prepare_Transmit_Descriptors(framelength);
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/* Give semaphore and exit */
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error:
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//xSemaphoreGive(xTxSemaphore);
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rt_mutex_release(xTxSemaphore);
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}
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return ERR_OK;
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}
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/**
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* Should allocate a pbuf and transfer the bytes of the incoming
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* packet from the interface into the pbuf.
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*
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* @param netif the lwip network interface structure for this ethernetif
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* @return a pbuf filled with the received packet (including MAC header)
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* NULL on memory error
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*/
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static struct pbuf * low_level_input(struct netif *netif)
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{
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struct pbuf *p= NULL, *q;
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u32_t len;
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FrameTypeDef frame;
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u8 *buffer;
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__IO ETH_DMADESCTypeDef *DMARxDesc;
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uint32_t bufferoffset = 0;
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uint32_t payloadoffset = 0;
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uint32_t byteslefttocopy = 0;
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uint32_t i=0;
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/* get received frame */
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frame = ETH_Get_Received_Frame_interrupt();
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/* Obtain the size of the packet and put it into the "len" variable. */
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len = frame.length;
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buffer = (u8 *)frame.buffer;
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if (len > 0)
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{
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/* We allocate a pbuf chain of pbufs from the Lwip buffer pool */
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p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
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}
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if (p != NULL)
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{
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DMARxDesc = frame.descriptor;
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bufferoffset = 0;
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for(q = p; q != NULL; q = q->next)
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{
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byteslefttocopy = q->len;
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payloadoffset = 0;
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/* Check if the length of bytes to copy in current pbuf is bigger than Rx buffer size*/
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while( (byteslefttocopy + bufferoffset) > ETH_RX_BUF_SIZE )
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{
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/* Copy data to pbuf*/
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memcpy( (u8_t*)((u8_t*)q->payload + payloadoffset), (u8_t*)((u8_t*)buffer + bufferoffset), (ETH_RX_BUF_SIZE - bufferoffset));
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/* Point to next descriptor */
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DMARxDesc = (ETH_DMADESCTypeDef *)(DMARxDesc->Buffer2NextDescAddr);
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buffer = (unsigned char *)(DMARxDesc->Buffer1Addr);
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byteslefttocopy = byteslefttocopy - (ETH_RX_BUF_SIZE - bufferoffset);
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payloadoffset = payloadoffset + (ETH_RX_BUF_SIZE - bufferoffset);
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bufferoffset = 0;
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}
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/* Copy remaining data in pbuf */
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memcpy( (u8_t*)((u8_t*)q->payload + payloadoffset), (u8_t*)((u8_t*)buffer + bufferoffset), byteslefttocopy);
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bufferoffset = bufferoffset + byteslefttocopy;
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}
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/* Release descriptors to DMA */
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DMARxDesc =frame.descriptor;
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/* Set Own bit in Rx descriptors: gives the buffers back to DMA */
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for (i=0; i<DMA_RX_FRAME_infos->Seg_Count; i++)
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{
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DMARxDesc->Status = ETH_DMARxDesc_OWN;
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DMARxDesc = (ETH_DMADESCTypeDef *)(DMARxDesc->Buffer2NextDescAddr);
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}
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/* Clear Segment_Count */
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DMA_RX_FRAME_infos->Seg_Count =0;
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/* added for test*/
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}
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/* When Rx Buffer unavailable flag is set: clear it and resume reception */
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if ((ETH->DMASR & ETH_DMASR_RBUS) != (u32)RESET)
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{
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/* Clear RBUS ETHERNET DMA flag */
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ETH->DMASR = ETH_DMASR_RBUS;
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/* Resume DMA reception */
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ETH->DMARPDR = 0;
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}
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return p;
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}
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/**
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* This function is the ethernetif_input task, it is processed when a packet
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* is ready to be read from the interface. It uses the function low_level_input()
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* that should handle the actual reception of bytes from the network
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* interface. Then the type of the received packet is determined and
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* the appropriate input function is called.
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*
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* @param netif the lwip network interface structure for this ethernetif
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*/
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void ethernetif_input( void * pvParameters )
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{
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struct pbuf *p;
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for( ;; )
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{
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//if (xSemaphoreTake( s_xSemaphore, emacBLOCK_TIME_WAITING_FOR_INPUT)==pdTRUE)
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if(rt_sem_take(s_xSemaphore,RT_WAITING_FOREVER)==RT_EOK)
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{
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TRY_GET_NEXT_FRAME:
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p = low_level_input( s_pxNetIf );
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if (p != NULL)
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{
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if (ERR_OK != s_pxNetIf->input( p, s_pxNetIf))
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{
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pbuf_free(p);
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}
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else
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{
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goto TRY_GET_NEXT_FRAME;
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}
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}
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}
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}
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}
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/**
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* Should be called at the beginning of the program to set up the
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* network interface. It calls the function low_level_init() to do the
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* actual setup of the hardware.
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*
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* This function should be passed as a parameter to netif_add().
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*
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* @param netif the lwip network interface structure for this ethernetif
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* @return ERR_OK if the loopif is initialized
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* ERR_MEM if private data couldn't be allocated
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* any other err_t on error
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*/
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err_t ethernetif_init(struct netif *netif)
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{
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LWIP_ASSERT("netif != NULL", (netif != NULL));
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#if LWIP_NETIF_HOSTNAME
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/* Initialize interface hostname */
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netif->hostname = "lwip";
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#endif /* LWIP_NETIF_HOSTNAME */
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netif->name[0] = IFNAME0;
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netif->name[1] = IFNAME1;
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netif->output = etharp_output;
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netif->linkoutput = low_level_output;
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/* initialize the hardware */
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low_level_init(netif);
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etharp_init();
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sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
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return ERR_OK;
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}
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static void arp_timer(void *arg)
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{
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etharp_tmr();
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sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
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}
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