Tom Martins / Mbed OS Probleme_implementation_lwip2

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Fork of Probleme_implementation_lwip by Tom Martins

ethernetif.cpp@2:9e76d51d9fb6, 2018-07-02 (annotated)

Committer:
TomTom83
Date:
Mon Jul 02 15:18:18 2018 +0000
Revision:
2:9e76d51d9fb6
Parent:
1:a3ee8cb24540 
probl?mes d'adaptation

Who changed what in which revision?

UserRevisionLine numberNew contents of line
TomTom83 1:a3ee8cb24540 1 /**
TomTom83 1:a3ee8cb24540 2 * @file
TomTom83 1:a3ee8cb24540 3 * Ethernet Interface for standalone applications (without RTOS) - works only for
TomTom83 1:a3ee8cb24540 4 * ethernet polling mode (polling for ethernet frame reception)
TomTom83 1:a3ee8cb24540 5 *
TomTom83 1:a3ee8cb24540 6 */
TomTom83 1:a3ee8cb24540 7
TomTom83 1:a3ee8cb24540 8 /*
TomTom83 1:a3ee8cb24540 9 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
TomTom83 1:a3ee8cb24540 10 * All rights reserved.
TomTom83 1:a3ee8cb24540 11 *
TomTom83 1:a3ee8cb24540 12 * Redistribution and use in source and binary forms, with or without modification,
TomTom83 1:a3ee8cb24540 13 * are permitted provided that the following conditions are met:
TomTom83 1:a3ee8cb24540 14 *
TomTom83 1:a3ee8cb24540 15 * 1. Redistributions of source code must retain the above copyright notice,
TomTom83 1:a3ee8cb24540 16 * this list of conditions and the following disclaimer.
TomTom83 1:a3ee8cb24540 17 * 2. Redistributions in binary form must reproduce the above copyright notice,
TomTom83 1:a3ee8cb24540 18 * this list of conditions and the following disclaimer in the documentation
TomTom83 1:a3ee8cb24540 19 * and/or other materials provided with the distribution.
TomTom83 1:a3ee8cb24540 20 * 3. The name of the author may not be used to endorse or promote products
TomTom83 1:a3ee8cb24540 21 * derived from this software without specific prior written permission.
TomTom83 1:a3ee8cb24540 22 *
TomTom83 1:a3ee8cb24540 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
TomTom83 1:a3ee8cb24540 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
TomTom83 1:a3ee8cb24540 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
TomTom83 1:a3ee8cb24540 26 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
TomTom83 1:a3ee8cb24540 27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
TomTom83 1:a3ee8cb24540 28 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
TomTom83 1:a3ee8cb24540 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
TomTom83 1:a3ee8cb24540 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
TomTom83 1:a3ee8cb24540 31 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
TomTom83 1:a3ee8cb24540 32 * OF SUCH DAMAGE.
TomTom83 1:a3ee8cb24540 33 *
TomTom83 1:a3ee8cb24540 34 * This file is part of the lwIP TCP/IP stack.
TomTom83 1:a3ee8cb24540 35 *
TomTom83 1:a3ee8cb24540 36 * Author: Adam Dunkels <adam@sics.se>
TomTom83 1:a3ee8cb24540 37 *
TomTom83 1:a3ee8cb24540 38 */
TomTom83 1:a3ee8cb24540 39
TomTom83 1:a3ee8cb24540 40 #include "lwip/mem.h"
TomTom83 1:a3ee8cb24540 41 #include "netif/etharp.h"
TomTom83 1:a3ee8cb24540 42 #include "ethernetif.h"
TomTom83 1:a3ee8cb24540 43 #include "main.h"
TomTom83 1:a3ee8cb24540 44 #include <string.h>
TomTom83 1:a3ee8cb24540 45
TomTom83 1:a3ee8cb24540 46 /* Network interface name */
TomTom83 1:a3ee8cb24540 47 #define IFNAME0 's'
TomTom83 1:a3ee8cb24540 48 #define IFNAME1 't'
TomTom83 1:a3ee8cb24540 49
TomTom83 1:a3ee8cb24540 50
TomTom83 1:a3ee8cb24540 51 /* Ethernet Rx & Tx DMA Descriptors */
TomTom83 1:a3ee8cb24540 52 extern ETH_DMADESCTypeDef DMARxDscrTab[ETH_RXBUFNB], DMATxDscrTab[ETH_TXBUFNB];
TomTom83 1:a3ee8cb24540 53
TomTom83 1:a3ee8cb24540 54 /* Ethernet Driver Receive buffers */
TomTom83 1:a3ee8cb24540 55 extern uint8_t Rx_Buff[ETH_RXBUFNB][ETH_RX_BUF_SIZE];
TomTom83 1:a3ee8cb24540 56
TomTom83 1:a3ee8cb24540 57 /* Ethernet Driver Transmit buffers */
TomTom83 1:a3ee8cb24540 58 extern uint8_t Tx_Buff[ETH_TXBUFNB][ETH_TX_BUF_SIZE];
TomTom83 1:a3ee8cb24540 59
TomTom83 1:a3ee8cb24540 60 /* Global pointers to track current transmit and receive descriptors */
TomTom83 1:a3ee8cb24540 61 extern ETH_DMADESCTypeDef *DMATxDescToSet;
TomTom83 1:a3ee8cb24540 62 extern ETH_DMADESCTypeDef *DMARxDescToGet;
TomTom83 1:a3ee8cb24540 63
TomTom83 1:a3ee8cb24540 64 /* Global pointer for last received frame infos */
TomTom83 1:a3ee8cb24540 65 extern ETH_DMA_Rx_Frame_infos *DMA_RX_FRAME_infos;
TomTom83 1:a3ee8cb24540 66
TomTom83 1:a3ee8cb24540 67
TomTom83 1:a3ee8cb24540 68
TomTom83 1:a3ee8cb24540 69
TomTom83 1:a3ee8cb24540 70 /**
TomTom83 1:a3ee8cb24540 71 * In this function, the hardware should be initialized.
TomTom83 1:a3ee8cb24540 72 * Called from ethernetif_init().
TomTom83 1:a3ee8cb24540 73 *
TomTom83 1:a3ee8cb24540 74 * @param netif the already initialized lwip network interface structure
TomTom83 1:a3ee8cb24540 75 * for this ethernetif
TomTom83 1:a3ee8cb24540 76 */
TomTom83 1:a3ee8cb24540 77 static void low_level_init(struct netif *netif)
TomTom83 1:a3ee8cb24540 78 {
TomTom83 1:a3ee8cb24540 79 #ifdef CHECKSUM_BY_HARDWARE
TomTom83 1:a3ee8cb24540 80 int i;
TomTom83 1:a3ee8cb24540 81 #endif
TomTom83 1:a3ee8cb24540 82 /* set MAC hardware address length */
TomTom83 1:a3ee8cb24540 83 netif->hwaddr_len = ETHARP_HWADDR_LEN;
TomTom83 1:a3ee8cb24540 84
TomTom83 1:a3ee8cb24540 85 /* set MAC hardware address */
TomTom83 1:a3ee8cb24540 86 netif->hwaddr[0] = MAC_ADDR0;
TomTom83 1:a3ee8cb24540 87 netif->hwaddr[1] = MAC_ADDR1;
TomTom83 1:a3ee8cb24540 88 netif->hwaddr[2] = MAC_ADDR2;
TomTom83 1:a3ee8cb24540 89 netif->hwaddr[3] = MAC_ADDR3;
TomTom83 1:a3ee8cb24540 90 netif->hwaddr[4] = MAC_ADDR4;
TomTom83 1:a3ee8cb24540 91 netif->hwaddr[5] = MAC_ADDR5;
TomTom83 1:a3ee8cb24540 92
TomTom83 1:a3ee8cb24540 93 /* initialize MAC address in ethernet MAC */
TomTom83 1:a3ee8cb24540 94 ETH_MACAddressConfig(ETH_MAC_Address0, netif->hwaddr);
TomTom83 1:a3ee8cb24540 95
TomTom83 1:a3ee8cb24540 96 /* maximum transfer unit */
TomTom83 1:a3ee8cb24540 97 netif->mtu = 1500;
TomTom83 1:a3ee8cb24540 98
TomTom83 1:a3ee8cb24540 99 /* device capabilities */
TomTom83 1:a3ee8cb24540 100 /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
TomTom83 1:a3ee8cb24540 101 netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
TomTom83 1:a3ee8cb24540 102
TomTom83 1:a3ee8cb24540 103 /* Initialize Tx Descriptors list: Chain Mode */
TomTom83 1:a3ee8cb24540 104 ETH_DMATxDescChainInit(DMATxDscrTab, &Tx_Buff[0][0], ETH_TXBUFNB);
TomTom83 1:a3ee8cb24540 105 /* Initialize Rx Descriptors list: Chain Mode */
TomTom83 1:a3ee8cb24540 106 ETH_DMARxDescChainInit(DMARxDscrTab, &Rx_Buff[0][0], ETH_RXBUFNB);
TomTom83 1:a3ee8cb24540 107
TomTom83 1:a3ee8cb24540 108 #ifdef CHECKSUM_BY_HARDWARE
TomTom83 1:a3ee8cb24540 109 /* Enable the TCP, UDP and ICMP checksum insertion for the Tx frames */
TomTom83 1:a3ee8cb24540 110 for(i=0; i<ETH_TXBUFNB; i++)
TomTom83 1:a3ee8cb24540 111 {
TomTom83 1:a3ee8cb24540 112 ETH_DMATxDescChecksumInsertionConfig(&DMATxDscrTab[i], ETH_DMATxDesc_ChecksumTCPUDPICMPFull);
TomTom83 1:a3ee8cb24540 113 }
TomTom83 1:a3ee8cb24540 114 #endif
TomTom83 1:a3ee8cb24540 115
TomTom83 1:a3ee8cb24540 116 /* Note: TCP, UDP, ICMP checksum checking for received frame are enabled in DMA config */
TomTom83 1:a3ee8cb24540 117
TomTom83 1:a3ee8cb24540 118 /* Enable MAC and DMA transmission and reception */
TomTom83 1:a3ee8cb24540 119 ETH_Start();
TomTom83 1:a3ee8cb24540 120
TomTom83 1:a3ee8cb24540 121 }
TomTom83 1:a3ee8cb24540 122
TomTom83 1:a3ee8cb24540 123 /**
TomTom83 1:a3ee8cb24540 124 * This function should do the actual transmission of the packet. The packet is
TomTom83 1:a3ee8cb24540 125 * contained in the pbuf that is passed to the function. This pbuf
TomTom83 1:a3ee8cb24540 126 * might be chained.
TomTom83 1:a3ee8cb24540 127 *
TomTom83 1:a3ee8cb24540 128 * @param netif the lwip network interface structure for this ethernetif
TomTom83 1:a3ee8cb24540 129 * @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
TomTom83 1:a3ee8cb24540 130 * @return ERR_OK if the packet could be sent
TomTom83 1:a3ee8cb24540 131 * an err_t value if the packet couldn't be sent
TomTom83 1:a3ee8cb24540 132 *
TomTom83 1:a3ee8cb24540 133 * @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to
TomTom83 1:a3ee8cb24540 134 * strange results. You might consider waiting for space in the DMA queue
TomTom83 1:a3ee8cb24540 135 * to become availale since the stack doesn't retry to send a packet
TomTom83 1:a3ee8cb24540 136 * dropped because of memory failure (except for the TCP timers).
TomTom83 1:a3ee8cb24540 137 */
TomTom83 1:a3ee8cb24540 138
TomTom83 1:a3ee8cb24540 139 static err_t low_level_output(struct netif *netif, struct pbuf *p)
TomTom83 1:a3ee8cb24540 140 {
TomTom83 1:a3ee8cb24540 141 struct pbuf *q;
TomTom83 1:a3ee8cb24540 142 int framelength = 0;
TomTom83 1:a3ee8cb24540 143 u8 *buffer = (u8 *)(DMATxDescToSet->Buffer1Addr);
TomTom83 1:a3ee8cb24540 144
TomTom83 1:a3ee8cb24540 145 /* copy frame from pbufs to driver buffers */
TomTom83 1:a3ee8cb24540 146 for(q = p; q != NULL; q = q->next)
TomTom83 1:a3ee8cb24540 147 {
TomTom83 1:a3ee8cb24540 148 memcpy((u8_t*)&buffer[framelength], q->payload, q->len);
TomTom83 1:a3ee8cb24540 149 framelength = framelength + q->len;
TomTom83 1:a3ee8cb24540 150 }
TomTom83 1:a3ee8cb24540 151
TomTom83 1:a3ee8cb24540 152 /* Note: padding and CRC for transmitted frame
TomTom83 1:a3ee8cb24540 153 are automatically inserted by DMA */
TomTom83 1:a3ee8cb24540 154
TomTom83 1:a3ee8cb24540 155 /* Prepare transmit descriptors to give to DMA*/
TomTom83 1:a3ee8cb24540 156 ETH_Prepare_Transmit_Descriptors(framelength);
TomTom83 1:a3ee8cb24540 157
TomTom83 1:a3ee8cb24540 158 return ERR_OK;
TomTom83 1:a3ee8cb24540 159 }
TomTom83 1:a3ee8cb24540 160
TomTom83 1:a3ee8cb24540 161 /**
TomTom83 1:a3ee8cb24540 162 * Should allocate a pbuf and transfer the bytes of the incoming
TomTom83 1:a3ee8cb24540 163 * packet from the interface into the pbuf.
TomTom83 1:a3ee8cb24540 164 *
TomTom83 1:a3ee8cb24540 165 * @param netif the lwip network interface structure for this ethernetif
TomTom83 1:a3ee8cb24540 166 * @return a pbuf filled with the received packet (including MAC header)
TomTom83 1:a3ee8cb24540 167 * NULL on memory error
TomTom83 1:a3ee8cb24540 168 */
TomTom83 1:a3ee8cb24540 169 static struct pbuf * low_level_input(struct netif *netif)
TomTom83 1:a3ee8cb24540 170 {
TomTom83 1:a3ee8cb24540 171 struct pbuf *p, *q;
TomTom83 1:a3ee8cb24540 172 u16_t len;
TomTom83 1:a3ee8cb24540 173 int l =0;
TomTom83 1:a3ee8cb24540 174 FrameTypeDef frame;
TomTom83 1:a3ee8cb24540 175 u8 *buffer;
TomTom83 1:a3ee8cb24540 176 uint32_t i=0;
TomTom83 1:a3ee8cb24540 177 __IO ETH_DMADESCTypeDef *DMARxNextDesc;
TomTom83 1:a3ee8cb24540 178
TomTom83 1:a3ee8cb24540 179
TomTom83 1:a3ee8cb24540 180 p = NULL;
TomTom83 1:a3ee8cb24540 181
TomTom83 1:a3ee8cb24540 182 /* get received frame */
TomTom83 1:a3ee8cb24540 183 frame = ETH_Get_Received_Frame();
TomTom83 1:a3ee8cb24540 184
TomTom83 1:a3ee8cb24540 185 /* Obtain the size of the packet and put it into the "len" variable. */
TomTom83 1:a3ee8cb24540 186 len = frame.length;
TomTom83 1:a3ee8cb24540 187 buffer = (u8 *)frame.buffer;
TomTom83 1:a3ee8cb24540 188
TomTom83 1:a3ee8cb24540 189 /* We allocate a pbuf chain of pbufs from the Lwip buffer pool */
TomTom83 1:a3ee8cb24540 190 p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
TomTom83 1:a3ee8cb24540 191
TomTom83 1:a3ee8cb24540 192 /* copy received frame to pbuf chain */
TomTom83 1:a3ee8cb24540 193 if (p != NULL)
TomTom83 1:a3ee8cb24540 194 {
TomTom83 1:a3ee8cb24540 195 for (q = p; q != NULL; q = q->next)
TomTom83 1:a3ee8cb24540 196 {
TomTom83 1:a3ee8cb24540 197 memcpy((u8_t*)q->payload, (u8_t*)&buffer[l], q->len);
TomTom83 1:a3ee8cb24540 198 l = l + q->len;
TomTom83 1:a3ee8cb24540 199 }
TomTom83 1:a3ee8cb24540 200 }
TomTom83 1:a3ee8cb24540 201
TomTom83 1:a3ee8cb24540 202 /* Release descriptors to DMA */
TomTom83 1:a3ee8cb24540 203 /* Check if frame with multiple DMA buffer segments */
TomTom83 1:a3ee8cb24540 204 if (DMA_RX_FRAME_infos->Seg_Count > 1)
TomTom83 1:a3ee8cb24540 205 {
TomTom83 1:a3ee8cb24540 206 DMARxNextDesc = DMA_RX_FRAME_infos->FS_Rx_Desc;
TomTom83 1:a3ee8cb24540 207 }
TomTom83 1:a3ee8cb24540 208 else
TomTom83 1:a3ee8cb24540 209 {
TomTom83 1:a3ee8cb24540 210 DMARxNextDesc = frame.descriptor;
TomTom83 1:a3ee8cb24540 211 }
TomTom83 1:a3ee8cb24540 212
TomTom83 1:a3ee8cb24540 213 /* Set Own bit in Rx descriptors: gives the buffers back to DMA */
TomTom83 1:a3ee8cb24540 214 for (i=0; i<DMA_RX_FRAME_infos->Seg_Count; i++)
TomTom83 1:a3ee8cb24540 215 {
TomTom83 1:a3ee8cb24540 216 DMARxNextDesc->Status = ETH_DMARxDesc_OWN;
TomTom83 1:a3ee8cb24540 217 DMARxNextDesc = (ETH_DMADESCTypeDef *)(DMARxNextDesc->Buffer2NextDescAddr);
TomTom83 1:a3ee8cb24540 218 }
TomTom83 1:a3ee8cb24540 219
TomTom83 1:a3ee8cb24540 220 /* Clear Segment_Count */
TomTom83 1:a3ee8cb24540 221 DMA_RX_FRAME_infos->Seg_Count =0;
TomTom83 1:a3ee8cb24540 222
TomTom83 1:a3ee8cb24540 223 /* When Rx Buffer unavailable flag is set: clear it and resume reception */
TomTom83 1:a3ee8cb24540 224 if ((ETH->DMASR & ETH_DMASR_RBUS) != (u32)RESET)
TomTom83 1:a3ee8cb24540 225 {
TomTom83 1:a3ee8cb24540 226 /* Clear RBUS ETHERNET DMA flag */
TomTom83 1:a3ee8cb24540 227 ETH->DMASR = ETH_DMASR_RBUS;
TomTom83 1:a3ee8cb24540 228 /* Resume DMA reception */
TomTom83 1:a3ee8cb24540 229 ETH->DMARPDR = 0;
TomTom83 1:a3ee8cb24540 230 }
TomTom83 1:a3ee8cb24540 231 return p;
TomTom83 1:a3ee8cb24540 232 }
TomTom83 1:a3ee8cb24540 233
TomTom83 1:a3ee8cb24540 234 /**
TomTom83 1:a3ee8cb24540 235 * This function should be called when a packet is ready to be read
TomTom83 1:a3ee8cb24540 236 * from the interface. It uses the function low_level_input() that
TomTom83 1:a3ee8cb24540 237 * should handle the actual reception of bytes from the network
TomTom83 1:a3ee8cb24540 238 * interface. Then the type of the received packet is determined and
TomTom83 1:a3ee8cb24540 239 * the appropriate input function is called.
TomTom83 1:a3ee8cb24540 240 *
TomTom83 1:a3ee8cb24540 241 * @param netif the lwip network interface structure for this ethernetif
TomTom83 1:a3ee8cb24540 242 */
TomTom83 1:a3ee8cb24540 243 err_t ethernetif_input(struct netif *netif)
TomTom83 1:a3ee8cb24540 244 {
TomTom83 1:a3ee8cb24540 245 err_t err;
TomTom83 1:a3ee8cb24540 246 struct pbuf *p;
TomTom83 1:a3ee8cb24540 247
TomTom83 1:a3ee8cb24540 248 /* move received packet into a new pbuf */
TomTom83 1:a3ee8cb24540 249 p = low_level_input(netif);
TomTom83 1:a3ee8cb24540 250
TomTom83 1:a3ee8cb24540 251 /* no packet could be read, silently ignore this */
TomTom83 1:a3ee8cb24540 252 if (p == NULL) return ERR_MEM;
TomTom83 1:a3ee8cb24540 253
TomTom83 1:a3ee8cb24540 254 /* entry point to the LwIP stack */
TomTom83 1:a3ee8cb24540 255 err = netif->input(p, netif);
TomTom83 1:a3ee8cb24540 256
TomTom83 1:a3ee8cb24540 257 if (err != ERR_OK)
TomTom83 1:a3ee8cb24540 258 {
TomTom83 1:a3ee8cb24540 259 LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
TomTom83 1:a3ee8cb24540 260 pbuf_free(p);
TomTom83 1:a3ee8cb24540 261 p = NULL;
TomTom83 1:a3ee8cb24540 262 }
TomTom83 1:a3ee8cb24540 263 return err;
TomTom83 1:a3ee8cb24540 264 }
TomTom83 1:a3ee8cb24540 265
TomTom83 1:a3ee8cb24540 266 /**
TomTom83 1:a3ee8cb24540 267 * Should be called at the beginning of the program to set up the
TomTom83 1:a3ee8cb24540 268 * network interface. It calls the function low_level_init() to do the
TomTom83 1:a3ee8cb24540 269 * actual setup of the hardware.
TomTom83 1:a3ee8cb24540 270 *
TomTom83 1:a3ee8cb24540 271 * This function should be passed as a parameter to netif_add().
TomTom83 1:a3ee8cb24540 272 *
TomTom83 1:a3ee8cb24540 273 * @param netif the lwip network interface structure for this ethernetif
TomTom83 1:a3ee8cb24540 274 * @return ERR_OK if the loopif is initialized
TomTom83 1:a3ee8cb24540 275 * ERR_MEM if private data couldn't be allocated
TomTom83 1:a3ee8cb24540 276 * any other err_t on error
TomTom83 1:a3ee8cb24540 277 */
TomTom83 1:a3ee8cb24540 278 err_t ethernetif_init(struct netif *netif)
TomTom83 1:a3ee8cb24540 279 {
TomTom83 1:a3ee8cb24540 280 LWIP_ASSERT("netif != NULL", (netif != NULL));
TomTom83 1:a3ee8cb24540 281
TomTom83 1:a3ee8cb24540 282 #if LWIP_NETIF_HOSTNAME
TomTom83 1:a3ee8cb24540 283 /* Initialize interface hostname */
TomTom83 1:a3ee8cb24540 284 netif->hostname = "RAIMA";
TomTom83 1:a3ee8cb24540 285 #endif /* LWIP_NETIF_HOSTNAME */
TomTom83 1:a3ee8cb24540 286
TomTom83 1:a3ee8cb24540 287 strncpy(netif->name,"RAIMA",5);
TomTom83 1:a3ee8cb24540 288
TomTom83 1:a3ee8cb24540 289 /* We directly use etharp_output() here to save a function call.
TomTom83 1:a3ee8cb24540 290 * You can instead declare your own function an call etharp_output()
TomTom83 1:a3ee8cb24540 291 * from it if you have to do some checks before sending (e.g. if link
TomTom83 1:a3ee8cb24540 292 * is available...) */
TomTom83 1:a3ee8cb24540 293 netif->output = etharp_output;
TomTom83 1:a3ee8cb24540 294 netif->linkoutput = low_level_output;
TomTom83 1:a3ee8cb24540 295
TomTom83 1:a3ee8cb24540 296 /* initialize the hardware */
TomTom83 1:a3ee8cb24540 297 low_level_init(netif);
TomTom83 1:a3ee8cb24540 298
TomTom83 1:a3ee8cb24540 299 return ERR_OK;
TomTom83 1:a3ee8cb24540 300 }
TomTom83 1:a3ee8cb24540 301
TomTom83 1:a3ee8cb24540 302
TomTom83 1:a3ee8cb24540 303
TomTom83 1:a3ee8cb24540 304