Ethernet Link Status is not working

Hello, are you speaking about PHY ETH4 IRQ line? It's not enabled by the ETH low level driver, neither the stack sets up any external interrupt on any GPIO pin.

You have to do this manually.

LWIP/ST implementation uses a thread to check the status of PHY by polling.

Thank you sir for replay, Yes , I mean PHY ETH4 IRQ line

I checked LWIP status thread , But there also i am not getting the Link down or up status but thread is running.

LWIP thread code :-

void ethernetif_set_link(void const *argument)

{

 uint32_t regvalue = 0;

 struct link_str *link_arg = (struct link_str *)argument;

 for(;;)

 {

  /* Read PHY_BSR*/

  HAL_ETH_ReadPHYRegister(&heth, PHY_BSR, &regvalue);

  regvalue &= PHY_LINKED_STATUS;

  /* Check whether the netif link down and the PHY link is up */

  if(!netif_is_link_up(link_arg->netif) && (regvalue))

  {

   /* network cable is connected */ 

   netif_set_link_up(link_arg->netif);     

  }

  else if(netif_is_link_up(link_arg->netif) && (!regvalue))

  {

   /* network cable is dis-connected */

   netif_set_link_down(link_arg->netif);

  }

  /* Suspend thread for 200 ms */

  osDelay(200);

 }

}