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/**
******************************************************************************
* @file LwIP/LwIP_IAP/Src/app_ethernet.c
* @author MCD Application Team
* @brief Ethernet specific module
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "lwip/opt.h"
#include "main.h"
#if LWIP_DHCP
#include "lwip/dhcp.h"
#endif
#include "app_ethernet.h"
#include "ethernetif.h"
#ifdef USE_LCD
#include "lcd_log.h"
#endif
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint32_t EthernetLinkTimer;
#if LWIP_DHCP
#define MAX_DHCP_TRIES 4
uint32_t DHCPfineTimer = 0;
uint8_t DHCP_state = DHCP_OFF;
#endif
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/**
* @brief Notify the User about the network interface config status
* @param netif: the network interface
* @retval None
*/
void ethernet_link_status_updated(struct netif *netif)
{
if (netif_is_link_up(netif))
{
#if LWIP_DHCP
/* Update DHCP state machine */
DHCP_state = DHCP_START;
#elif defined(USE_LCD)
uint8_t iptxt[20];
sprintf((char *)iptxt, "%s", ip4addr_ntoa(netif_ip4_addr(netif)));
LCD_UsrTrace ("Static IP address: %s\n", iptxt);
#else
BSP_LED_On(LED1);
BSP_LED_Off(LED2);
#endif /* LWIP_DHCP */
}
else
{
#if LWIP_DHCP
/* Update DHCP state machine */
DHCP_state = DHCP_LINK_DOWN;
#elif defined(USE_LCD)
LCD_UsrTrace ("The network cable is not connected \n");
#else
BSP_LED_Off(LED1);
BSP_LED_On(LED2);
#endif /* LWIP_DHCP */
}
}
#if LWIP_NETIF_LINK_CALLBACK
/**
* @brief Ethernet Link periodic check
* @param netif
* @retval None
*/
void Ethernet_Link_Periodic_Handle(struct netif *netif)
{
/* Ethernet Link every 100ms */
if (HAL_GetTick() - EthernetLinkTimer >= 100)
{
EthernetLinkTimer = HAL_GetTick();
ethernet_link_check_state(netif);
}
}
#endif
#if LWIP_DHCP
/**
* @brief DHCP_Process_Handle
* @param None
* @retval None
*/
void DHCP_Process(struct netif *netif)
{
ip_addr_t ipaddr;
ip_addr_t netmask;
ip_addr_t gw;
struct dhcp *dhcp;
#ifdef USE_LCD
uint8_t iptxt[20];
#endif
switch (DHCP_state)
{
case DHCP_START:
{
#ifdef USE_LCD
LCD_UsrLog (" State: Looking for DHCP server ...\n");
#else
BSP_LED_Off(LED1);
BSP_LED_Off(LED2);
#endif
ip_addr_set_zero_ip4(&netif->ip_addr);
ip_addr_set_zero_ip4(&netif->netmask);
ip_addr_set_zero_ip4(&netif->gw);
dhcp_start(netif);
DHCP_state = DHCP_WAIT_ADDRESS;
}
break;
case DHCP_WAIT_ADDRESS:
{
if (dhcp_supplied_address(netif))
{
DHCP_state = DHCP_ADDRESS_ASSIGNED;
#ifdef USE_LCD
sprintf((char *)iptxt, "%s", ip4addr_ntoa(netif_ip4_addr(netif)));
LCD_UsrLog ("IP address assigned by a DHCP server: %s\n", iptxt);
#else
BSP_LED_On(LED1);
BSP_LED_Off(LED2);
#endif
}
else
{
dhcp = (struct dhcp *)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP);
/* DHCP timeout */
if (dhcp->tries > MAX_DHCP_TRIES)
{
DHCP_state = DHCP_TIMEOUT;
/* Static address used */
IP_ADDR4(&ipaddr, IP_ADDR0 ,IP_ADDR1 , IP_ADDR2 , IP_ADDR3 );
IP_ADDR4(&netmask, NETMASK_ADDR0, NETMASK_ADDR1, NETMASK_ADDR2, NETMASK_ADDR3);
IP_ADDR4(&gw, GW_ADDR0, GW_ADDR1, GW_ADDR2, GW_ADDR3);
netif_set_addr(netif, &ipaddr, &netmask, &gw);
#ifdef USE_LCD
sprintf((char *)iptxt, "%s", ip4addr_ntoa(netif_ip4_addr(netif)));
LCD_UsrLog ("DHCP Timeout !! \n");
LCD_UsrLog ("Static IP address: %s\n", iptxt);
#else
BSP_LED_On(LED1);
BSP_LED_Off(LED2);
#endif
}
}
}
break;
case DHCP_LINK_DOWN:
{
DHCP_state = DHCP_OFF;
#ifdef USE_LCD
LCD_UsrLog ("The network cable is not connected \n");
#else
BSP_LED_Off(LED1);
BSP_LED_On(LED2);
#endif
}
break;
default: break;
}
}
/**
* @brief DHCP periodic check
* @param netif
* @retval None
*/
void DHCP_Periodic_Handle(struct netif *netif)
{
/* Fine DHCP periodic process every 500ms */
if (HAL_GetTick() - DHCPfineTimer >= DHCP_FINE_TIMER_MSECS)
{
DHCPfineTimer = HAL_GetTick();
/* process DHCP state machine */
DHCP_Process(netif);
}
}
#endif