LWIP移植过程中板子与PC机不能建立通信是怎么回事？

虽说现在能够TCP通信和ping相通了，但还是想弄明白ARP协议工作流程，在仿真调试的时候还是出现“如题的现象”？先把仿真结果和串口输出信息附上，有哪位大侠解释下啊？

接收的arp数据包相关信息

串口输出ARP相关调试信息
电脑信息：IP 192.168.0.54  MAC 00-30-48-7D-F0-2E
板子信息: IP 192.168.0.10   MAC  00-80-48-12-34-56

这是不是类似于lwip中etharp_gratuitous（）函数的功能啊，是不是PC网卡发送的无回报（gratuitous）ARP请求啊？？

开启lwip的调试信息后输出如下：
[C] 纯文本查看 复制代码
PHY works in 100Mbps full-duplex mode!netif: added interface en IP addr 192.168.0.10 netmask 255.255.255.0 gw 192.168.0.1netif: setting default interface enetharp_request: sending ARP request.pbuf_alloc(length=42)pbuf_alloc(length=42) == 20000350etharp_raw: sending raw ARP packet.TSRI transfer successfully!pbuf_free(20000350)pbuf_free: deallocating 20000350there are some packets coming!pbuf_alloc(length=64)pbuf_alloc: allocated pbuf 200062a4pbuf_alloc(length=64) == 200062a4ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:30:48:7d:f0:2e, type:806etharp_update_arp_entry: 192.168.0.54 - 00:30:48:7d:f0:2eetharp_find_entry: found empty entry 0etharp_find_entry: no empty entry found and not allowed to recycleetharp_arp_input: incoming ARP requestetharp_arp_input: ARP request was not for us.pbuf_free(200062a4)pbuf_free: deallocating 200062a4

终于ping通了，自己移植ST官方lwipopts.h的时候直接copy过来的，把以下代码删除就可以ping通了
[C] 纯文本查看 复制代码
   ---------- Checksum options ----------   --------------------------------------*//* The STM32F4x7 allows computing and verifying the IP, UDP, TCP and ICMP checksums by hardware: - To use this feature let the following define uncommented. - To disable it and process by CPU comment the  the checksum.*/#define CHECKSUM_BY_HARDWARE #ifdef CHECKSUM_BY_HARDWARE  /* CHECKSUM_GEN_IP==0: Generate checksums by hardware for outgoing IP packets.*/  #define CHECKSUM_GEN_IP                 0  /* CHECKSUM_GEN_UDP==0: Generate checksums by hardware for outgoing UDP packets.*/  #define CHECKSUM_GEN_UDP                0  /* CHECKSUM_GEN_TCP==0: Generate checksums by hardware for outgoing TCP packets.*/  #define CHECKSUM_GEN_TCP                0   /* CHECKSUM_CHECK_IP==0: Check checksums by hardware for incoming IP packets.*/  #define CHECKSUM_CHECK_IP               0  /* CHECKSUM_CHECK_UDP==0: Check checksums by hardware for incoming UDP packets.*/  #define CHECKSUM_CHECK_UDP              0  /* CHECKSUM_CHECK_TCP==0: Check checksums by hardware for incoming TCP packets.*/  #define CHECKSUM_CHECK_TCP              0  /* CHECKSUM_CHECK_ICMP==0: Check checksums by hardware for incoming ICMP packets.*/  #define CHECKSUM_GEN_ICMP               0#else  /* CHECKSUM_GEN_IP==1: Generate checksums in software for outgoing IP packets.*/  #define CHECKSUM_GEN_IP                 1  /* CHECKSUM_GEN_UDP==1: Generate checksums in software for outgoing UDP packets.*/  #define CHECKSUM_GEN_UDP                1  /* CHECKSUM_GEN_TCP==1: Generate checksums in software for outgoing TCP packets.*/  #define CHECKSUM_GEN_TCP                1  /* CHECKSUM_CHECK_IP==1: Check checksums in software for incoming IP packets.*/  #define CHECKSUM_CHECK_IP               1  /* CHECKSUM_CHECK_UDP==1: Check checksums in software for incoming UDP packets.*/  #define CHECKSUM_CHECK_UDP              1  /* CHECKSUM_CHECK_TCP==1: Check checksums in software for incoming TCP packets.*/  #define CHECKSUM_CHECK_TCP              1  /* CHECKSUM_CHECK_ICMP==1: Check checksums by hardware for incoming ICMP packets.*/  #define CHECKSUM_GEN_ICMP               1#endif