hii Andrew thanks for help it helped me a lot
thats my code of the lwip_init () in the lwip.c
/**
* LwIP initialization function
*/
void MX_LWIP_Init(void )
{
/* IP addresses initialization */
IP_ADDRESS[0] = 192;
IP_ADDRESS[1] = 168;
IP_ADDRESS[2] = 127;
IP_ADDRESS[3] = 100;
NETMASK_ADDRESS[0] = 255;
NETMASK_ADDRESS[1] = 255;
NETMASK_ADDRESS[2] = 255;
NETMASK_ADDRESS[3] = 0;
GATEWAY_ADDRESS[0] = 0;
GATEWAY_ADDRESS[1] = 0;
GATEWAY_ADDRESS[2] = 0;
GATEWAY_ADDRESS[3] = 0;
/* USER CODE BEGIN IP_ADDRESSES */
/* USER CODE END IP_ADDRESSES */
/* Initialize the LwIP stack without RTOS */
lwip_init();
/* IP addresses initialization without DHCP (IPv4) */
IP4_ADDR(&ipaddr, IP_ADDRESS[0], IP_ADDRESS[1], IP_ADDRESS[2], IP_ADDRESS[3]);
IP4_ADDR(&netmask, NETMASK_ADDRESS[0], NETMASK_ADDRESS[1] , NETMASK_ADDRESS[2], NETMASK_ADDRESS[3]);
IP4_ADDR(&gw, GATEWAY_ADDRESS[0], GATEWAY_ADDRESS[1], GATEWAY_ADDRESS[2], GATEWAY_ADDRESS[3]);
/* add the network interface (IPv4/IPv6) without RTOS */
netif_add(&gnetif, &ipaddr, &netmask, &gw, NULL, ðernetif_init, ðernet_input);
/* Registers the default network interface */
netif_set_default(&gnetif);
/* We must always bring the network interface up connection or not... */
netif_set_up(&gnetif);
/* Set the link callback function, this function is called on change of link status*/
netif_set_link_callback(&gnetif, ethernet_link_status_updated);
/* USER CODE BEGIN 3 */
/* USER CODE END 3 */
}
this function is generated automatically when is disable dhcp in the ioc file as yo can see the ip that is configured is 192.168.127.100
lets say i want to set a new ip that is received from uart as a side channel and the new ip for example will be
192.168.127.103
what functions do i need to use in order to update the new ip address into the network interface
from my understanding i need the following steps to do after a bit of research:
1- to use the macro IP4_ADDR to initialize the new ip address netmask and gateway without dhcp
2- add the network interface using netif_add
3-and somehow to trigger or call a function that do the update to the network interface i am using stmcube ver 1.17.2 what is the function that does this update ?
another question do i need to create a function that does all 1-3 operations?
and did i mess something? another operation that needs to be added ?
and where is the place to put this operations in what file lwip.c or main.c ?
where is the most appropriate once i get the new ip in the uart
