How to change ip address using LWIP on K64

inorman — Thu, 27 Jun 2019 15:08:35 GMT

Hi, I've managed to incorporate the LWIP stack into our project and can successfully ping etc.. and have now moved on to try and make the ip address as a user setting but I'm have trouble getting this to apply. I've followed the ping example and adding netif_set_down first to the sequence as

netif_set_down(&fsl_netif0);

printf("ip address set as %d.%d.%d.%d\r\n",configIP_ADDR[0],configIP_ADDR[1],configIP_ADDR[2],configIP_ADDR[3]);
IP4_ADDR(&fsl_netif0_ipaddr, configIP_ADDR[0], configIP_ADDR[1], configIP_ADDR[2], configIP_ADDR[3]);
IP4_ADDR(&fsl_netif0_netmask, configNET_MASK[0], configNET_MASK[1], configNET_MASK[2], configNET_MASK[3]);
IP4_ADDR(&fsl_netif0_gw, configGW_ADDR[0], configGW_ADDR[1], configGW_ADDR[2], configGW_ADDR[3]);

lwip_init();

netif_add(&fsl_netif0, &fsl_netif0_ipaddr, &fsl_netif0_netmask, &fsl_netif0_gw,
&fsl_enet_config0, ethernetif0_init, ethernet_input);
netif_set_default(&fsl_netif0);
netif_set_up(&fsl_netif0);

After setting a new ip address pinging the previous address now fails so it's had some effect but I can't successfully ping the new address.

Any ideas on what steps I'm missing?

Thanks

Ian

Re: How to change ip address using LWIP on K64

inorman — Mon, 01 Jul 2019 13:07:07 GMT

For anyone having this issue I found the answer in the LWIP wiki under the IPv4 section https://lwip.fandom.com/wiki/IPv4

and use the function netif_set_ipaddr instead of adding the interface again.

Cheers

Ian

Kinetis Software Development KitのトピックHow to change ip address using LWIP on K64

How to change ip address using LWIP on K64

Re: How to change ip address using LWIP on K64