ethernetif.c File Reference

#include "main.h"
#include "lwip/opt.h"
#include "lwip/timeouts.h"
#include "netif/ethernet.h"
#include "netif/etharp.h"
#include "lwip/ethip6.h"
#include "ethernetif.h"
#include <string.h>
#include "cmsis_os.h"
#include "lwip/netifapi.h"
#include "otp.h"

Macros
#define	TIME_WAITING_FOR_INPUT   (portMAX_DELAY)
#define	INTERFACE_THREAD_STACK_SIZE   (350)
#define	IFNAME0   's'
#define	IFNAME1   't'

Functions
void	HAL_ETH_MspInit (ETH_HandleTypeDef *ethHandle)
void	HAL_ETH_MspDeInit (ETH_HandleTypeDef *ethHandle)
void	HAL_ETH_RxCpltCallback (ETH_HandleTypeDef *heth)
	Ethernet Rx Transfer completed callback. More...
void	ethernetif_link (const void *arg)
static void	low_level_init (struct netif *netif)
static err_t	low_level_output (struct netif *netif, struct pbuf *p)
static struct pbuf *	low_level_input (struct netif *netif)
void	ethernetif_input (void const *argument)
static err_t	low_level_output_arp_off (struct netif *netif, struct pbuf *q, const ip4_addr_t *ipaddr)
err_t	ethernetif_init (struct netif *netif)
u32_t	sys_jiffies (void)
	Returns the current time in milliseconds when LWIP_TIMERS == 1 and NO_SYS == 1. More...
u32_t	sys_now (void)
	Returns the current time in milliseconds when LWIP_TIMERS == 1 and NO_SYS == 1. More...

Variables
__ALIGN_BEGIN ETH_DMADescTypeDef DMARxDscrTab[ETH_RXBUFNB]	__ALIGN_END
osSemaphoreId	s_xSemaphore = NULL
ETH_HandleTypeDef	heth

Macro Definition Documentation

TIME_WAITING_FOR_INPUT

#define TIME_WAITING_FOR_INPUT   (portMAX_DELAY)

File Name : ethernetif.c Description : This file provides code for the configuration of the ethernetif.c MiddleWare.

This notice applies to any and all portions of this file that are not between comment pairs USER CODE BEGIN and USER CODE END. Other portions of this file, whether inserted by the user or by software development tools are owned by their respective copyright owners.

Copyright (c) 2019 STMicroelectronics International N.V. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted, provided that the following conditions are met:

1. Redistribution of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. Neither the name of STMicroelectronics nor the names of other contributors to this software may be used to endorse or promote products derived from this software without specific written permission.
4. This software, including modifications and/or derivative works of this software, must execute solely and exclusively on microcontroller or microprocessor devices manufactured by or for STMicroelectronics.
5. Redistribution and use of this software other than as permitted under this license is void and will automatically terminate your rights under this license.

THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

INTERFACE_THREAD_STACK_SIZE

#define INTERFACE_THREAD_STACK_SIZE   (350)

IFNAME0

#define IFNAME0   's'

IFNAME1

#define IFNAME1   't'

Function Documentation

HAL_ETH_MspInit()

void HAL_ETH_MspInit

(

ETH_HandleTypeDef *

ethHandle

)

ETH GPIO Configuration PC1 ---—> ETH_MDC PA1 ---—> ETH_REF_CLK PA2 ---—> ETH_MDIO PA7 ---—> ETH_CRS_DV PC4 ---—> ETH_RXD0 PC5 ---—> ETH_RXD1 PB11 ---—> ETH_TX_EN PB12 ---—> ETH_TXD0 PB13 ---—> ETH_TXD1

                                                   {
    GPIO_InitTypeDef GPIO_InitStruct;
    if (ethHandle->Instance == ETH) {
        /* USER CODE BEGIN ETH_MspInit 0 */
 
        /* USER CODE END ETH_MspInit 0 */
        /* Enable Peripheral clock */
        __HAL_RCC_ETH_CLK_ENABLE();
 
        /**ETH GPIO Configuration
    PC1     ------> ETH_MDC
    PA1     ------> ETH_REF_CLK
    PA2     ------> ETH_MDIO
    PA7     ------> ETH_CRS_DV
    PC4     ------> ETH_RXD0
    PC5     ------> ETH_RXD1
    PB11     ------> ETH_TX_EN
    PB12     ------> ETH_TXD0
    PB13     ------> ETH_TXD1
    */
        GPIO_InitStruct.Pin = GPIO_PIN_1 | GPIO_PIN_4 | GPIO_PIN_5;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_NOPULL;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
        GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
        HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
        GPIO_InitStruct.Pin = GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_7;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_NOPULL;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
        GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
        HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
        GPIO_InitStruct.Pin = GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_NOPULL;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
        GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
        HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
        /* Peripheral interrupt init */
        HAL_NVIC_SetPriority(ETH_IRQn, 5, 0);
        HAL_NVIC_EnableIRQ(ETH_IRQn);
        /* USER CODE BEGIN ETH_MspInit 1 */
 
        /* USER CODE END ETH_MspInit 1 */
    }
}

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HAL_ETH_MspDeInit()

void HAL_ETH_MspDeInit

(

ETH_HandleTypeDef *

ethHandle

)

ETH GPIO Configuration PC1 ---—> ETH_MDC PA1 ---—> ETH_REF_CLK PA2 ---—> ETH_MDIO PA7 ---—> ETH_CRS_DV PC4 ---—> ETH_RXD0 PC5 ---—> ETH_RXD1 PB11 ---—> ETH_TX_EN PB12 ---—> ETH_TXD0 PB13 ---—> ETH_TXD1

                                                     {
    if (ethHandle->Instance == ETH) {
        /* USER CODE BEGIN ETH_MspDeInit 0 */
 
        /* USER CODE END ETH_MspDeInit 0 */
        /* Peripheral clock disable */
        __HAL_RCC_ETH_CLK_DISABLE();
 
        /**ETH GPIO Configuration
    PC1     ------> ETH_MDC
    PA1     ------> ETH_REF_CLK
    PA2     ------> ETH_MDIO
    PA7     ------> ETH_CRS_DV
    PC4     ------> ETH_RXD0
    PC5     ------> ETH_RXD1
    PB11     ------> ETH_TX_EN
    PB12     ------> ETH_TXD0
    PB13     ------> ETH_TXD1
    */
        HAL_GPIO_DeInit(GPIOC, GPIO_PIN_1 | GPIO_PIN_4 | GPIO_PIN_5);
 
        HAL_GPIO_DeInit(GPIOA, GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_7);
 
        HAL_GPIO_DeInit(GPIOB, GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13);
 
        /* Peripheral interrupt Deinit*/
        HAL_NVIC_DisableIRQ(ETH_IRQn);
 
        /* USER CODE BEGIN ETH_MspDeInit 1 */
 
        /* USER CODE END ETH_MspDeInit 1 */
    }
}

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HAL_ETH_RxCpltCallback()

void HAL_ETH_RxCpltCallback

(

ETH_HandleTypeDef *

heth

)

Ethernet Rx Transfer completed callback.

Parameters

heth	ETH handle

Return values

None

                                                     {
    osSemaphoreRelease(s_xSemaphore);
}

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ethernetif_link()

void ethernetif_link

(

const void *

arg

)

                                      {
    struct netif *netif = (struct netif *)arg;
    uint8_t eth_link;
    uint32_t phyreg = 0U;
 
    while (1) {
        HAL_ETH_ReadPHYRegister(&heth, PHY_BSR, &phyreg);
        eth_link = (phyreg & PHY_LINKED_STATUS) == PHY_LINKED_STATUS ? 1 : 0;
 
        if (eth_link != netif_is_link_up(netif)) {
            if (eth_link) {
                netifapi_netif_set_link_up(netif); // thread safe variant
                osDelay(5000); // give some time to reconnect
            } else {
                netifapi_netif_set_link_down(netif);
            }
        }
 
        osDelay(200);
    }
}

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low_level_init()

static void low_level_init ( struct netif *  netif )

static

In this function, the hardware should be initialized. Called from ethernetif_init().

Parameters

netif

the already initialized lwip network interface structure for this ethernetif

                                                {
    uint32_t regvalue = 0;
    HAL_StatusTypeDef hal_eth_init_status;
 
    /* Init ETH */
 
    heth.Instance = ETH;
    heth.Init.AutoNegotiation = ETH_AUTONEGOTIATION_ENABLE;
    heth.Init.PhyAddress = LAN8742A_PHY_ADDRESS;
    // set  mac address from OTP memory
    heth.Init.MACAddr = (uint8_t *)OTP_MAC_ADDRESS_ADDR;
    heth.Init.RxMode = ETH_RXINTERRUPT_MODE;
    heth.Init.ChecksumMode = ETH_CHECKSUM_BY_HARDWARE;
    heth.Init.MediaInterface = ETH_MEDIA_INTERFACE_RMII;
 
    /* USER CODE BEGIN MACADDRESS */
 
    /* USER CODE END MACADDRESS */
 
    hal_eth_init_status = HAL_ETH_Init(&heth);
 
    if (hal_eth_init_status == HAL_OK) {
        /* Set netif link flag */
        netif->flags |= NETIF_FLAG_LINK_UP;
    }
    /* Initialize Tx Descriptors list: Chain Mode */
    HAL_ETH_DMATxDescListInit(&heth, DMATxDscrTab, &Tx_Buff[0][0], ETH_TXBUFNB);
 
    /* Initialize Rx Descriptors list: Chain Mode  */
    HAL_ETH_DMARxDescListInit(&heth, DMARxDscrTab, &Rx_Buff[0][0], ETH_RXBUFNB);
 
#if LWIP_ARP || LWIP_ETHERNET
 
    /* set MAC hardware address length */
    netif->hwaddr_len = ETH_HWADDR_LEN;
 
    /* set MAC hardware address */
    netif->hwaddr[0] = heth.Init.MACAddr[0];
    netif->hwaddr[1] = heth.Init.MACAddr[1];
    netif->hwaddr[2] = heth.Init.MACAddr[2];
    netif->hwaddr[3] = heth.Init.MACAddr[3];
    netif->hwaddr[4] = heth.Init.MACAddr[4];
    netif->hwaddr[5] = heth.Init.MACAddr[5];
 
    /* maximum transfer unit */
    netif->mtu = 1500;
 
    /* Accept broadcast address and ARP traffic */
    /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
    #if LWIP_ARP
    netif->flags |= NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
    #else
    netif->flags |= NETIF_FLAG_BROADCAST;
    #endif /* LWIP_ARP */
 
    /* create a binary semaphore used for informing ethernetif of frame reception */
    osSemaphoreDef(SEM);
    s_xSemaphore = osSemaphoreCreate(osSemaphore(SEM), 1);
 
    /* create the task that handles the ETH_MAC */
    osThreadDef(EthIf, ethernetif_input, osPriorityRealtime, 0, INTERFACE_THREAD_STACK_SIZE);
    osThreadCreate(osThread(EthIf), netif);
    /* Enable MAC and DMA transmission and reception */
    HAL_ETH_Start(&heth);
 
    /* USER CODE BEGIN PHY_PRE_CONFIG */
    /* link check */
    osThreadDef(EthIfLink, ethernetif_link, osPriorityLow, 0, INTERFACE_THREAD_STACK_SIZE);
    osThreadCreate(osThread(EthIfLink), netif);
 
    /* USER CODE END PHY_PRE_CONFIG */
 
    /* Read Register Configuration */
    HAL_ETH_ReadPHYRegister(&heth, PHY_ISFR, &regvalue);
    regvalue |= (PHY_ISFR_INT4);
 
    /* Enable Interrupt on change of link status */
    HAL_ETH_WritePHYRegister(&heth, PHY_ISFR, regvalue);
 
    /* Read Register Configuration */
    HAL_ETH_ReadPHYRegister(&heth, PHY_ISFR, &regvalue);
 
    /* USER CODE BEGIN PHY_POST_CONFIG */
 
    /* USER CODE END PHY_POST_CONFIG */
 
#endif /* LWIP_ARP || LWIP_ETHERNET */
 
    /* USER CODE BEGIN LOW_LEVEL_INIT */
 
    /* USER CODE END LOW_LEVEL_INIT */

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low_level_output()

static err_t low_level_output ( struct netif *  netif, struct pbuf *  p  )

static

This function should do the actual transmission of the packet. The packet is contained in the pbuf that is passed to the function. This pbuf might be chained.

Parameters

netif	the lwip network interface structure for this ethernetif
p	the MAC packet to send (e.g. IP packet including MAC addresses and type)

Returns

ERR_OK if the packet could be sent an err_t value if the packet couldn't be sent

Note

Returning ERR_MEM here if a DMA queue of your MAC is full can lead to strange results. You might consider waiting for space in the DMA queue to become availale since the stack doesn't retry to send a packet dropped because of memory failure (except for the TCP timers).

                                                                   {
    err_t errval;
    struct pbuf *q;
    uint8_t *buffer = (uint8_t *)(heth.TxDesc->Buffer1Addr);
    __IO ETH_DMADescTypeDef *DmaTxDesc;
    uint32_t framelength = 0;
    uint32_t bufferoffset = 0;
    uint32_t byteslefttocopy = 0;
    uint32_t payloadoffset = 0;
    DmaTxDesc = heth.TxDesc;
    bufferoffset = 0;
 
    /* copy frame from pbufs to driver buffers */
    for (q = p; q != NULL; q = q->next) {
        /* Is this buffer available? If not, goto error */
        if ((DmaTxDesc->Status & ETH_DMATXDESC_OWN) != (uint32_t)RESET) {
            errval = ERR_USE;
            goto error;
        }
 
        /* Get bytes in current lwIP buffer */
        byteslefttocopy = q->len;
        payloadoffset = 0;
 
        /* Check if the length of data to copy is bigger than Tx buffer size*/
        while ((byteslefttocopy + bufferoffset) > ETH_TX_BUF_SIZE) {
            /* Copy data to Tx buffer*/
            memcpy((uint8_t *)((uint8_t *)buffer + bufferoffset), (uint8_t *)((uint8_t *)q->payload + payloadoffset), (ETH_TX_BUF_SIZE - bufferoffset));
 
            /* Point to next descriptor */
            DmaTxDesc = (ETH_DMADescTypeDef *)(DmaTxDesc->Buffer2NextDescAddr);
 
            /* Check if the buffer is available */
            if ((DmaTxDesc->Status & ETH_DMATXDESC_OWN) != (uint32_t)RESET) {
                errval = ERR_USE;
                goto error;
            }
 
            buffer = (uint8_t *)(DmaTxDesc->Buffer1Addr);
 
            byteslefttocopy = byteslefttocopy - (ETH_TX_BUF_SIZE - bufferoffset);
            payloadoffset = payloadoffset + (ETH_TX_BUF_SIZE - bufferoffset);
            framelength = framelength + (ETH_TX_BUF_SIZE - bufferoffset);
            bufferoffset = 0;
        }
 
        /* Copy the remaining bytes */
        memcpy((uint8_t *)((uint8_t *)buffer + bufferoffset), (uint8_t *)((uint8_t *)q->payload + payloadoffset), byteslefttocopy);
        bufferoffset = bufferoffset + byteslefttocopy;
        framelength = framelength + byteslefttocopy;
    }
 
    /* Prepare transmit descriptors to give to DMA */
    HAL_ETH_TransmitFrame(&heth, framelength);
 
    errval = ERR_OK;
 
error:
 
    /* When Transmit Underflow flag is set, clear it and issue a Transmit Poll Demand to resume transmission */
    if ((heth.Instance->DMASR & ETH_DMASR_TUS) != (uint32_t)RESET) {
        /* Clear TUS ETHERNET DMA flag */
        heth.Instance->DMASR = ETH_DMASR_TUS;
 
        /* Resume DMA transmission*/
        heth.Instance->DMATPDR = 0;
    }
    return errval;

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low_level_input()

static struct pbuf* low_level_input ( struct netif *  netif )

static

Should allocate a pbuf and transfer the bytes of the incoming packet from the interface into the pbuf.

Parameters

netif

the lwip network interface structure for this ethernetif

Returns

a pbuf filled with the received packet (including MAC header) NULL on memory error

                                                         {
    struct pbuf *p = NULL;
    struct pbuf *q = NULL;
    uint16_t len = 0;
    uint8_t *buffer;
    __IO ETH_DMADescTypeDef *dmarxdesc;
    uint32_t bufferoffset = 0;
    uint32_t payloadoffset = 0;
    uint32_t byteslefttocopy = 0;
    uint32_t i = 0;
 
    /* get received frame */
    if (HAL_ETH_GetReceivedFrame_IT(&heth) != HAL_OK)
        return NULL;
 
    /* Obtain the size of the packet and put it into the "len" variable. */
    len = heth.RxFrameInfos.length;
    buffer = (uint8_t *)heth.RxFrameInfos.buffer;
 
    if (len > 0) {
        /* We allocate a pbuf chain of pbufs from the Lwip buffer pool */
        p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
    }
 
    if (p != NULL) {
        dmarxdesc = heth.RxFrameInfos.FSRxDesc;
        bufferoffset = 0;
        for (q = p; q != NULL; q = q->next) {
            byteslefttocopy = q->len;
            payloadoffset = 0;
 
            /* Check if the length of bytes to copy in current pbuf is bigger than Rx buffer size*/
            while ((byteslefttocopy + bufferoffset) > ETH_RX_BUF_SIZE) {
                /* Copy data to pbuf */
                memcpy((uint8_t *)((uint8_t *)q->payload + payloadoffset), (uint8_t *)((uint8_t *)buffer + bufferoffset), (ETH_RX_BUF_SIZE - bufferoffset));
 
                /* Point to next descriptor */
                dmarxdesc = (ETH_DMADescTypeDef *)(dmarxdesc->Buffer2NextDescAddr);
                buffer = (uint8_t *)(dmarxdesc->Buffer1Addr);
 
                byteslefttocopy = byteslefttocopy - (ETH_RX_BUF_SIZE - bufferoffset);
                payloadoffset = payloadoffset + (ETH_RX_BUF_SIZE - bufferoffset);
                bufferoffset = 0;
            }
            /* Copy remaining data in pbuf */
            memcpy((uint8_t *)((uint8_t *)q->payload + payloadoffset), (uint8_t *)((uint8_t *)buffer + bufferoffset), byteslefttocopy);
            bufferoffset = bufferoffset + byteslefttocopy;
        }
    }
 
    /* Release descriptors to DMA */
    /* Point to first descriptor */
    dmarxdesc = heth.RxFrameInfos.FSRxDesc;
    /* Set Own bit in Rx descriptors: gives the buffers back to DMA */
    for (i = 0; i < heth.RxFrameInfos.SegCount; i++) {
        dmarxdesc->Status |= ETH_DMARXDESC_OWN;
        dmarxdesc = (ETH_DMADescTypeDef *)(dmarxdesc->Buffer2NextDescAddr);
    }
 
    /* Clear Segment_Count */
    heth.RxFrameInfos.SegCount = 0;
 
    /* When Rx Buffer unavailable flag is set: clear it and resume reception */
    if ((heth.Instance->DMASR & ETH_DMASR_RBUS) != (uint32_t)RESET) {
        /* Clear RBUS ETHERNET DMA flag */
        heth.Instance->DMASR = ETH_DMASR_RBUS;
        /* Resume DMA reception */
        heth.Instance->DMARPDR = 0;
    }
    return p;

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ethernetif_input()

void ethernetif_input

(

void const *

argument

)

This function should be called when a packet is ready to be read from the interface. It uses the function low_level_input() that should handle the actual reception of bytes from the network interface. Then the type of the received packet is determined and the appropriate input function is called.

Parameters

netif

the lwip network interface structure for this ethernetif

                                            {
    struct pbuf *p;
    struct netif *netif = (struct netif *)argument;
 
    for (;;) {
        if (osSemaphoreWait(s_xSemaphore, TIME_WAITING_FOR_INPUT) == osOK) {
            do {
                p = low_level_input(netif);
                if (p != NULL) {
                    if (netif->input(p, netif) != ERR_OK) {
                        pbuf_free(p);
                    }
                }
            } while (p != NULL);
        }
    }

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low_level_output_arp_off()

static err_t low_level_output_arp_off ( struct netif *  netif, struct pbuf *  q, const ip4_addr_t *  ipaddr  )

static

This function has to be completed by user in case of ARP OFF.

Parameters

netif

the lwip network interface structure for this ethernetif

Returns

ERR_OK if ...

                                                                                                     {
    err_t errval;
    errval = ERR_OK;
 
    /* USER CODE BEGIN 5 */
 
    /* USER CODE END 5 */
 
    return errval;

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ethernetif_init()

err_t ethernetif_init

(

struct netif *

netif

)

Should be called at the beginning of the program to set up the network interface. It calls the function low_level_init() to do the actual setup of the hardware.

This function should be passed as a parameter to netif_add().

Parameters

netif

the lwip network interface structure for this ethernetif

Returns

ERR_OK if the loopif is initialized ERR_MEM if private data couldn't be allocated any other err_t on error

                                           {
    LWIP_ASSERT("netif != NULL", (netif != NULL));
 
#if LWIP_NETIF_HOSTNAME
    /* Initialize interface hostname */
    netif->hostname = "lwip";
#endif /* LWIP_NETIF_HOSTNAME */
 
    netif->name[0] = IFNAME0;
    netif->name[1] = IFNAME1;
    /* We directly use etharp_output() here to save a function call.
   * You can instead declare your own function an call etharp_output()
   * from it if you have to do some checks before sending (e.g. if link
   * is available...) */
 
#if LWIP_IPV4
    #if LWIP_ARP || LWIP_ETHERNET
        #if LWIP_ARP
    netif->output = etharp_output;
        #else
    /* The user should write ist own code in low_level_output_arp_off function */
    netif->output = low_level_output_arp_off;
        #endif /* LWIP_ARP */
    #endif /* LWIP_ARP || LWIP_ETHERNET */
#endif /* LWIP_IPV4 */
 
#if LWIP_IPV6
    netif->output_ip6 = ethip6_output;
#endif /* LWIP_IPV6 */
 
    netif->linkoutput = low_level_output;
 
    /* initialize the hardware */
    low_level_init(netif);
 
    return ERR_OK;

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sys_jiffies()

u32_t sys_jiffies

(

void

)

Returns the current time in milliseconds when LWIP_TIMERS == 1 and NO_SYS == 1.

Parameters

None

Return values

Time

                        {
    return HAL_GetTick();

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Variable Documentation

__ALIGN_END

__ALIGN_BEGIN uint8_t Tx_Buff [ETH_TXBUFNB][ETH_TX_BUF_SIZE] __ALIGN_END

< IAR Compiler

s_xSemaphore

osSemaphoreId s_xSemaphore = NULL

heth

ETH_HandleTypeDef heth