====== Misc for FreeRTOS And lwIP Porting ======

----


===== 文件 =====
 
ethernetif.c / ethernetif.h
/*
 * This file is a skeleton for developing Ethernet network interface
 * drivers for lwIP. Add code to the low_level functions and do a
 * search-and-replace for the word "ethernetif" to replace it with
 * something that better describes your network interface.
 */

为lwip提供访问以太网的API，包括对MAC(硬件)收发数据包，初始化接口描述符

API：
err_t ethernetif_init(struct netif *netif)
err_t ethernetif_input(struct netif *netif)