以太网

[英文]

应用示例

以太网驱动程序模型

以太网通用接口

以太网 MAC 接口

以太网 PHY 接口

以太网 PHY 公共寄存器

API 参考 – 驱动程序模型

Header File

API 参考 – 通用接口

Header File

Structures

struct esp_eth_mediator_s

Ethernet mediator.

Public Members

esp_err_t (*phy_reg_read)(esp_eth_mediator_t *eth, uint32_t phy_addr, uint32_t phy_reg, uint32_t *reg_value)

Read PHY register.

Param eth

[in] mediator of Ethernet driver

Param phy_addr

[in] PHY Chip address (0~31)

Param phy_reg

[in] PHY register index code

Param reg_value

[out] PHY register value

Return

  • ESP_OK: read PHY register successfully

  • ESP_FAIL: read PHY register failed because some error occurred

esp_err_t (*phy_reg_write)(esp_eth_mediator_t *eth, uint32_t phy_addr, uint32_t phy_reg, uint32_t reg_value)

Write PHY register.

Param eth

[in] mediator of Ethernet driver

Param phy_addr

[in] PHY Chip address (0~31)

Param phy_reg

[in] PHY register index code

Param reg_value

[in] PHY register value

Return

  • ESP_OK: write PHY register successfully

  • ESP_FAIL: write PHY register failed because some error occurred

esp_err_t (*stack_input)(esp_eth_mediator_t *eth, uint8_t *buffer, uint32_t length)

Deliver packet to upper stack.

Param eth

[in] mediator of Ethernet driver

Param buffer

[in] packet buffer

Param length

[in] length of the packet

Return

  • ESP_OK: deliver packet to upper stack successfully

  • ESP_FAIL: deliver packet failed because some error occurred

esp_err_t (*on_state_changed)(esp_eth_mediator_t *eth, esp_eth_state_t state, void *args)

Callback on Ethernet state changed.

Param eth

[in] mediator of Ethernet driver

Param state

[in] new state

Param args

[in] optional argument for the new state

Return

  • ESP_OK: process the new state successfully

  • ESP_FAIL: process the new state failed because some error occurred

Type Definitions

typedef struct esp_eth_mediator_s esp_eth_mediator_t

Ethernet mediator.

Enumerations

enum esp_eth_state_t

Ethernet driver state.

Values:

enumerator ETH_STATE_LLINIT

Lowlevel init done

enumerator ETH_STATE_DEINIT

Deinit done

enumerator ETH_STATE_LINK

Link status changed

enumerator ETH_STATE_SPEED

Speed updated

enumerator ETH_STATE_DUPLEX

Duplex updated

enumerator ETH_STATE_PAUSE

Pause ability updated

enum eth_event_t

Ethernet event declarations.

Values:

enumerator ETHERNET_EVENT_START

Ethernet driver start

enumerator ETHERNET_EVENT_STOP

Ethernet driver stop

enumerator ETHERNET_EVENT_CONNECTED

Ethernet got a valid link

enumerator ETHERNET_EVENT_DISCONNECTED

Ethernet lost a valid link

API 参考 – MAC 接口

Header File

Unions

union eth_mac_clock_config_t
#include <esp_eth_mac.h>

Ethernet MAC Clock Configuration.

Public Members

struct eth_mac_clock_config_t::[anonymous] mii

EMAC MII Clock Configuration

emac_rmii_clock_mode_t clock_mode

RMII Clock Mode Configuration

emac_rmii_clock_gpio_t clock_gpio

RMII Clock GPIO Configuration

struct eth_mac_clock_config_t::[anonymous] rmii

EMAC RMII Clock Configuration

Structures

struct esp_eth_mac_s

Ethernet MAC.

Public Members

esp_err_t (*set_mediator)(esp_eth_mac_t *mac, esp_eth_mediator_t *eth)

Set mediator for Ethernet MAC.

Param mac

[in] Ethernet MAC instance

Param eth

[in] Ethernet mediator

Return

  • ESP_OK: set mediator for Ethernet MAC successfully

  • ESP_ERR_INVALID_ARG: set mediator for Ethernet MAC failed because of invalid argument

esp_err_t (*init)(esp_eth_mac_t *mac)

Initialize Ethernet MAC.

Param mac

[in] Ethernet MAC instance

Return

  • ESP_OK: initialize Ethernet MAC successfully

  • ESP_ERR_TIMEOUT: initialize Ethernet MAC failed because of timeout

  • ESP_FAIL: initialize Ethernet MAC failed because some other error occurred

esp_err_t (*deinit)(esp_eth_mac_t *mac)

Deinitialize Ethernet MAC.

Param mac

[in] Ethernet MAC instance

Return

  • ESP_OK: deinitialize Ethernet MAC successfully

  • ESP_FAIL: deinitialize Ethernet MAC failed because some error occurred

esp_err_t (*start)(esp_eth_mac_t *mac)

Start Ethernet MAC.

Param mac

[in] Ethernet MAC instance

Return

  • ESP_OK: start Ethernet MAC successfully

  • ESP_FAIL: start Ethernet MAC failed because some other error occurred

esp_err_t (*stop)(esp_eth_mac_t *mac)

Stop Ethernet MAC.

Param mac

[in] Ethernet MAC instance

Return

  • ESP_OK: stop Ethernet MAC successfully

  • ESP_FAIL: stop Ethernet MAC failed because some error occurred

esp_err_t (*transmit)(esp_eth_mac_t *mac, uint8_t *buf, uint32_t length)

Transmit packet from Ethernet MAC.

备注

Returned error codes may differ for each specific MAC chip.

Param mac

[in] Ethernet MAC instance

Param buf

[in] packet buffer to transmit

Param length

[in] length of packet

Return

  • ESP_OK: transmit packet successfully

  • ESP_ERR_INVALID_SIZE: number of actually sent bytes differs to expected

  • ESP_FAIL: transmit packet failed because some other error occurred

esp_err_t (*transmit_vargs)(esp_eth_mac_t *mac, uint32_t argc, va_list args)

Transmit packet from Ethernet MAC constructed with special parameters at Layer2.

备注

Typical intended use case is to make possible to construct a frame from multiple higher layer buffers without a need of buffer reallocations. However, other use cases are not limited.

备注

Returned error codes may differ for each specific MAC chip.

Param mac

[in] Ethernet MAC instance

Param argc

[in] number variable arguments

Param args

[in] variable arguments

Return

  • ESP_OK: transmit packet successfully

  • ESP_ERR_INVALID_SIZE: number of actually sent bytes differs to expected

  • ESP_FAIL: transmit packet failed because some other error occurred

esp_err_t (*receive)(esp_eth_mac_t *mac, uint8_t *buf, uint32_t *length)

Receive packet from Ethernet MAC.

备注

Memory of buf is allocated in the Layer2, make sure it get free after process.

备注

Before this function got invoked, the value of “length” should set by user, equals the size of buffer. After the function returned, the value of “length” means the real length of received data.

Param mac

[in] Ethernet MAC instance

Param buf

[out] packet buffer which will preserve the received frame

Param length

[out] length of the received packet

Return

  • ESP_OK: receive packet successfully

  • ESP_ERR_INVALID_ARG: receive packet failed because of invalid argument

  • ESP_ERR_INVALID_SIZE: input buffer size is not enough to hold the incoming data. in this case, value of returned “length” indicates the real size of incoming data.

  • ESP_FAIL: receive packet failed because some other error occurred

esp_err_t (*read_phy_reg)(esp_eth_mac_t *mac, uint32_t phy_addr, uint32_t phy_reg, uint32_t *reg_value)

Read PHY register.

Param mac

[in] Ethernet MAC instance

Param phy_addr

[in] PHY chip address (0~31)

Param phy_reg

[in] PHY register index code

Param reg_value

[out] PHY register value

Return

  • ESP_OK: read PHY register successfully

  • ESP_ERR_INVALID_ARG: read PHY register failed because of invalid argument

  • ESP_ERR_INVALID_STATE: read PHY register failed because of wrong state of MAC

  • ESP_ERR_TIMEOUT: read PHY register failed because of timeout

  • ESP_FAIL: read PHY register failed because some other error occurred

esp_err_t (*write_phy_reg)(esp_eth_mac_t *mac, uint32_t phy_addr, uint32_t phy_reg, uint32_t reg_value)

Write PHY register.

Param mac

[in] Ethernet MAC instance

Param phy_addr

[in] PHY chip address (0~31)

Param phy_reg

[in] PHY register index code

Param reg_value

[in] PHY register value

Return

  • ESP_OK: write PHY register successfully

  • ESP_ERR_INVALID_STATE: write PHY register failed because of wrong state of MAC

  • ESP_ERR_TIMEOUT: write PHY register failed because of timeout

  • ESP_FAIL: write PHY register failed because some other error occurred

esp_err_t (*set_addr)(esp_eth_mac_t *mac, uint8_t *addr)

Set MAC address.

Param mac

[in] Ethernet MAC instance

Param addr

[in] MAC address

Return

  • ESP_OK: set MAC address successfully

  • ESP_ERR_INVALID_ARG: set MAC address failed because of invalid argument

  • ESP_FAIL: set MAC address failed because some other error occurred

esp_err_t (*get_addr)(esp_eth_mac_t *mac, uint8_t *addr)

Get MAC address.

Param mac

[in] Ethernet MAC instance

Param addr

[out] MAC address

Return

  • ESP_OK: get MAC address successfully

  • ESP_ERR_INVALID_ARG: get MAC address failed because of invalid argument

  • ESP_FAIL: get MAC address failed because some other error occurred

esp_err_t (*set_speed)(esp_eth_mac_t *mac, eth_speed_t speed)

Set speed of MAC.

Param ma:c

[in] Ethernet MAC instance

Param speed

[in] MAC speed

Return

  • ESP_OK: set MAC speed successfully

  • ESP_ERR_INVALID_ARG: set MAC speed failed because of invalid argument

  • ESP_FAIL: set MAC speed failed because some other error occurred

esp_err_t (*set_duplex)(esp_eth_mac_t *mac, eth_duplex_t duplex)

Set duplex mode of MAC.

Param mac

[in] Ethernet MAC instance

Param duplex

[in] MAC duplex

Return

  • ESP_OK: set MAC duplex mode successfully

  • ESP_ERR_INVALID_ARG: set MAC duplex failed because of invalid argument

  • ESP_FAIL: set MAC duplex failed because some other error occurred

esp_err_t (*set_link)(esp_eth_mac_t *mac, eth_link_t link)

Set link status of MAC.

Param mac

[in] Ethernet MAC instance

Param link

[in] Link status

Return

  • ESP_OK: set link status successfully

  • ESP_ERR_INVALID_ARG: set link status failed because of invalid argument

  • ESP_FAIL: set link status failed because some other error occurred

esp_err_t (*set_promiscuous)(esp_eth_mac_t *mac, bool enable)

Set promiscuous of MAC.

Param mac

[in] Ethernet MAC instance

Param enable

[in] set true to enable promiscuous mode; set false to disable promiscuous mode

Return

  • ESP_OK: set promiscuous mode successfully

  • ESP_FAIL: set promiscuous mode failed because some error occurred

esp_err_t (*enable_flow_ctrl)(esp_eth_mac_t *mac, bool enable)

Enable flow control on MAC layer or not.

Param mac

[in] Ethernet MAC instance

Param enable

[in] set true to enable flow control; set false to disable flow control

Return

  • ESP_OK: set flow control successfully

  • ESP_FAIL: set flow control failed because some error occurred

esp_err_t (*set_peer_pause_ability)(esp_eth_mac_t *mac, uint32_t ability)

Set the PAUSE ability of peer node.

Param mac

[in] Ethernet MAC instance

Param ability

[in] zero indicates that pause function is supported by link partner; non-zero indicates that pause function is not supported by link partner

Return

  • ESP_OK: set peer pause ability successfully

  • ESP_FAIL: set peer pause ability failed because some error occurred

esp_err_t (*custom_ioctl)(esp_eth_mac_t *mac, uint32_t cmd, void *data)

Custom IO function of MAC driver. This function is intended to extend common options of esp_eth_ioctl to cover specifics of MAC chip.

备注

This function may not be assigned when the MAC chip supports only most common set of configuration options.

Param mac

[in] Ethernet MAC instance

Param cmd

[in] IO control command

Param data

[inout] address of data for set command or address where to store the data when used with get command

Return

  • ESP_OK: process io command successfully

  • ESP_ERR_INVALID_ARG: process io command failed because of some invalid argument

  • ESP_FAIL: process io command failed because some other error occurred

  • ESP_ERR_NOT_SUPPORTED: requested feature is not supported

esp_err_t (*del)(esp_eth_mac_t *mac)

Free memory of Ethernet MAC.

Param mac

[in] Ethernet MAC instance

Return

  • ESP_OK: free Ethernet MAC instance successfully

  • ESP_FAIL: free Ethernet MAC instance failed because some error occurred

struct eth_mac_config_t

Configuration of Ethernet MAC object.

Public Members

uint32_t sw_reset_timeout_ms

Software reset timeout value (Unit: ms)

uint32_t rx_task_stack_size

Stack size of the receive task

uint32_t rx_task_prio

Priority of the receive task

uint32_t flags

Flags that specify extra capability for mac driver

Macros

ETH_MAC_FLAG_WORK_WITH_CACHE_DISABLE

MAC driver can work when cache is disabled

ETH_MAC_FLAG_PIN_TO_CORE

Pin MAC task to the CPU core where driver installation happened

ETH_MAC_DEFAULT_CONFIG()

Default configuration for Ethernet MAC object.

Type Definitions

typedef struct esp_eth_mac_s esp_eth_mac_t

Ethernet MAC.

Enumerations

enum emac_rmii_clock_mode_t

RMII Clock Mode Options.

Values:

enumerator EMAC_CLK_DEFAULT

Default values configured using Kconfig are going to be used when “Default” selected.

enumerator EMAC_CLK_EXT_IN

Input RMII Clock from external. EMAC Clock GPIO number needs to be configured when this option is selected.

备注

MAC will get RMII clock from outside. Note that ESP32 only supports GPIO0 to input the RMII clock.

enumerator EMAC_CLK_OUT

Output RMII Clock from internal APLL Clock. EMAC Clock GPIO number needs to be configured when this option is selected.

enum emac_rmii_clock_gpio_t

RMII Clock GPIO number Options.

Values:

enumerator EMAC_CLK_IN_GPIO

MAC will get RMII clock from outside at this GPIO.

备注

ESP32 only supports GPIO0 to input the RMII clock.

enumerator EMAC_APPL_CLK_OUT_GPIO

Output RMII Clock from internal APLL Clock available at GPIO0.

备注

GPIO0 can be set to output a pre-divided PLL clock (test only!). Enabling this option will configure GPIO0 to output a 50MHz clock. In fact this clock doesn’t have directly relationship with EMAC peripheral. Sometimes this clock won’t work well with your PHY chip. You might need to add some extra devices after GPIO0 (e.g. inverter). Note that outputting RMII clock on GPIO0 is an experimental practice. If you want the Ethernet to work with WiFi, don’t select GPIO0 output mode for stability.

enumerator EMAC_CLK_OUT_GPIO

Output RMII Clock from internal APLL Clock available at GPIO16.

enumerator EMAC_CLK_OUT_180_GPIO

Inverted Output RMII Clock from internal APLL Clock available at GPIO17.

API 参考 – PHY 接口

Header File

Functions

esp_eth_phy_t *esp_eth_phy_new_ip101(const eth_phy_config_t *config)

Create a PHY instance of IP101.

参数

config – [in] configuration of PHY

返回

  • instance: create PHY instance successfully

  • NULL: create PHY instance failed because some error occurred

esp_eth_phy_t *esp_eth_phy_new_rtl8201(const eth_phy_config_t *config)

Create a PHY instance of RTL8201.

参数

config – [in] configuration of PHY

返回

  • instance: create PHY instance successfully

  • NULL: create PHY instance failed because some error occurred

esp_eth_phy_t *esp_eth_phy_new_lan87xx(const eth_phy_config_t *config)

Create a PHY instance of LAN87xx.

参数

config – [in] configuration of PHY

返回

  • instance: create PHY instance successfully

  • NULL: create PHY instance failed because some error occurred

esp_eth_phy_t *esp_eth_phy_new_dp83848(const eth_phy_config_t *config)

Create a PHY instance of DP83848.

参数

config – [in] configuration of PHY

返回

  • instance: create PHY instance successfully

  • NULL: create PHY instance failed because some error occurred

esp_eth_phy_t *esp_eth_phy_new_ksz80xx(const eth_phy_config_t *config)

Create a PHY instance of KSZ80xx.

The phy model from the KSZ80xx series is detected automatically. If the driver is unable to detect a supported model, NULL is returned.

Currently, the following models are supported: KSZ8001, KSZ8021, KSZ8031, KSZ8041, KSZ8051, KSZ8061, KSZ8081, KSZ8091

参数

config – [in] configuration of PHY

返回

  • instance: create PHY instance successfully

  • NULL: create PHY instance failed because some error occurred

Structures

struct esp_eth_phy_s

Ethernet PHY.

Public Members

esp_err_t (*set_mediator)(esp_eth_phy_t *phy, esp_eth_mediator_t *mediator)

Set mediator for PHY.

Param phy

[in] Ethernet PHY instance

Param mediator

[in] mediator of Ethernet driver

Return

  • ESP_OK: set mediator for Ethernet PHY instance successfully

  • ESP_ERR_INVALID_ARG: set mediator for Ethernet PHY instance failed because of some invalid arguments

esp_err_t (*reset)(esp_eth_phy_t *phy)

Software Reset Ethernet PHY.

Param phy

[in] Ethernet PHY instance

Return

  • ESP_OK: reset Ethernet PHY successfully

  • ESP_FAIL: reset Ethernet PHY failed because some error occurred

esp_err_t (*reset_hw)(esp_eth_phy_t *phy)

Hardware Reset Ethernet PHY.

备注

Hardware reset is mostly done by pull down and up PHY’s nRST pin

Param phy

[in] Ethernet PHY instance

Return

  • ESP_OK: reset Ethernet PHY successfully

  • ESP_FAIL: reset Ethernet PHY failed because some error occurred

esp_err_t (*init)(esp_eth_phy_t *phy)

Initialize Ethernet PHY.

Param phy

[in] Ethernet PHY instance

Return

  • ESP_OK: initialize Ethernet PHY successfully

  • ESP_FAIL: initialize Ethernet PHY failed because some error occurred

esp_err_t (*deinit)(esp_eth_phy_t *phy)

Deinitialize Ethernet PHY.

Param phy

[in] Ethernet PHY instance

Return

  • ESP_OK: deinitialize Ethernet PHY successfully

  • ESP_FAIL: deinitialize Ethernet PHY failed because some error occurred

esp_err_t (*autonego_ctrl)(esp_eth_phy_t *phy, eth_phy_autoneg_cmd_t cmd, bool *autonego_en_stat)

Configure auto negotiation.

Param phy

[in] Ethernet PHY instance

Param cmd

[in] Configuration command, it is possible to Enable (restart), Disable or get current status of PHY auto negotiation

Param autonego_en_stat

[out] Address where to store current status of auto negotiation configuration

Return

  • ESP_OK: restart auto negotiation successfully

  • ESP_FAIL: restart auto negotiation failed because some error occurred

  • ESP_ERR_INVALID_ARG: invalid command

esp_err_t (*get_link)(esp_eth_phy_t *phy)

Get Ethernet PHY link status.

Param phy

[in] Ethernet PHY instance

Return

  • ESP_OK: get Ethernet PHY link status successfully

  • ESP_FAIL: get Ethernet PHY link status failed because some error occurred

esp_err_t (*pwrctl)(esp_eth_phy_t *phy, bool enable)

Power control of Ethernet PHY.

Param phy

[in] Ethernet PHY instance

Param enable

[in] set true to power on Ethernet PHY; ser false to power off Ethernet PHY

Return

  • ESP_OK: control Ethernet PHY power successfully

  • ESP_FAIL: control Ethernet PHY power failed because some error occurred

esp_err_t (*set_addr)(esp_eth_phy_t *phy, uint32_t addr)

Set PHY chip address.

Param phy

[in] Ethernet PHY instance

Param addr

[in] PHY chip address

Return

  • ESP_OK: set Ethernet PHY address successfully

  • ESP_FAIL: set Ethernet PHY address failed because some error occurred

esp_err_t (*get_addr)(esp_eth_phy_t *phy, uint32_t *addr)

Get PHY chip address.

Param phy

[in] Ethernet PHY instance

Param addr

[out] PHY chip address

Return

  • ESP_OK: get Ethernet PHY address successfully

  • ESP_ERR_INVALID_ARG: get Ethernet PHY address failed because of invalid argument

esp_err_t (*advertise_pause_ability)(esp_eth_phy_t *phy, uint32_t ability)

Advertise pause function supported by MAC layer.

Param phy

[in] Ethernet PHY instance

Param addr

[out] Pause ability

Return

  • ESP_OK: Advertise pause ability successfully

  • ESP_ERR_INVALID_ARG: Advertise pause ability failed because of invalid argument

esp_err_t (*loopback)(esp_eth_phy_t *phy, bool enable)

Sets the PHY to loopback mode.

Param phy

[in] Ethernet PHY instance

Param enable

[in] enables or disables PHY loopback

Return

  • ESP_OK: PHY instance loopback mode has been configured successfully

  • ESP_FAIL: PHY instance loopback configuration failed because some error occurred

esp_err_t (*set_speed)(esp_eth_phy_t *phy, eth_speed_t speed)

Sets PHY speed mode.

备注

Autonegotiation feature needs to be disabled prior to calling this function for the new setting to be applied

Param phy

[in] Ethernet PHY instance

Param speed

[in] Speed mode to be set

Return

  • ESP_OK: PHY instance speed mode has been configured successfully

  • ESP_FAIL: PHY instance speed mode configuration failed because some error occurred

esp_err_t (*set_duplex)(esp_eth_phy_t *phy, eth_duplex_t duplex)

Sets PHY duplex mode.

备注

Autonegotiation feature needs to be disabled prior to calling this function for the new setting to be applied

Param phy

[in] Ethernet PHY instance

Param duplex

[in] Duplex mode to be set

Return

  • ESP_OK: PHY instance duplex mode has been configured successfully

  • ESP_FAIL: PHY instance duplex mode configuration failed because some error occurred

esp_err_t (*custom_ioctl)(esp_eth_phy_t *phy, uint32_t cmd, void *data)

Custom IO function of PHY driver. This function is intended to extend common options of esp_eth_ioctl to cover specifics of PHY chip.

备注

This function may not be assigned when the PHY chip supports only most common set of configuration options.

Param phy

[in] Ethernet PHY instance

Param cmd

[in] IO control command

Param data

[inout] address of data for set command or address where to store the data when used with get command

Return

  • ESP_OK: process io command successfully

  • ESP_ERR_INVALID_ARG: process io command failed because of some invalid argument

  • ESP_FAIL: process io command failed because some other error occurred

  • ESP_ERR_NOT_SUPPORTED: requested feature is not supported

esp_err_t (*del)(esp_eth_phy_t *phy)

Free memory of Ethernet PHY instance.

Param phy

[in] Ethernet PHY instance

Return

  • ESP_OK: free PHY instance successfully

  • ESP_FAIL: free PHY instance failed because some error occurred

struct eth_phy_config_t

Ethernet PHY configuration.

Public Members

int32_t phy_addr

PHY address, set -1 to enable PHY address detection at initialization stage

uint32_t reset_timeout_ms

Reset timeout value (Unit: ms)

uint32_t autonego_timeout_ms

Auto-negotiation timeout value (Unit: ms)

int reset_gpio_num

Reset GPIO number, -1 means no hardware reset

Macros

ESP_ETH_PHY_ADDR_AUTO
ETH_PHY_DEFAULT_CONFIG()

Default configuration for Ethernet PHY object.

Type Definitions

typedef struct esp_eth_phy_s esp_eth_phy_t

Ethernet PHY.

Enumerations

enum eth_phy_autoneg_cmd_t

Auto-negotiation controll commands.

Values:

enumerator ESP_ETH_PHY_AUTONEGO_RESTART
enumerator ESP_ETH_PHY_AUTONEGO_EN
enumerator ESP_ETH_PHY_AUTONEGO_DIS
enumerator ESP_ETH_PHY_AUTONEGO_G_STAT

API 参考 – esp_netif 相关使用

Header File

Functions

esp_eth_netif_glue_handle_t esp_eth_new_netif_glue(esp_eth_handle_t eth_hdl)

Create a netif glue for Ethernet driver.

备注

netif glue is used to attach io driver to TCP/IP netif

参数

eth_hdl – Ethernet driver handle

返回

glue object, which inherits esp_netif_driver_base_t

esp_err_t esp_eth_del_netif_glue(esp_eth_netif_glue_handle_t eth_netif_glue)

Delete netif glue of Ethernet driver.

参数

eth_netif_glue – netif glue

返回

-ESP_OK: delete netif glue successfully

Type Definitions

typedef struct esp_eth_netif_glue_t *esp_eth_netif_glue_handle_t

Handle of netif glue - an intermediate layer between netif and Ethernet driver.

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