/**
 ******************************************************************************
  * File Name          : LWIP.c
  * Description        : This file provides initialization code for LWIP
  *                      middleWare.
  ******************************************************************************
  * COPYRIGHT(c) 2016 STMicroelectronics
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  ******************************************************************************
  */
  
/* Includes ------------------------------------------------------------------*/
#include "lwip.h"
#include "lwip/init.h"
#include "lwip/netif.h"
#include "ethernetif.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/* ETH Variables initialization ----------------------------------------------*/
void Error_Handler(void);

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */
/* Semaphore to signal Ethernet Link state update */
osSemaphoreId Netif_LinkSemaphore = NULL;
/* Ethernet link thread Argument */
struct link_str link_arg;

/* Variables Initialization */
struct netif gnetif;
ip4_addr_t ipaddr;
ip4_addr_t netmask;
ip4_addr_t gw;

/* USER CODE BEGIN 2 */

/* USER CODE END 2 */

/**
  * LwIP initialization function
  */
void MX_LWIP_Init(void)
{
  /* Initilialize the LwIP stack with RTOS */
  tcpip_init( NULL, NULL );

  /* IP addresses initialization with DHCP (IPv4) */
  ipaddr.addr = 0;
  netmask.addr = 0;
  gw.addr = 0;

  /* add the network interface (IPv4/IPv6) with RTOS */
  netif_add(&gnetif, &ipaddr, &netmask, &gw, NULL, &ethernetif_init, &tcpip_input);

  /* Registers the default network interface */
  netif_set_default(&gnetif);

  if (netif_is_link_up(&gnetif))
  {
    /* When the netif is fully configured this function must be called */
    netif_set_up(&gnetif);
  }
  else
  {
    /* When the netif link is down this function must be called */
    netif_set_down(&gnetif);
  }

  /* Set the link callback function, this function is called on change of link status*/
  netif_set_link_callback(&gnetif, ethernetif_update_config);

  /* create a binary semaphore used for informing ethernetif of frame reception */
  osSemaphoreDef(Netif_SEM);
  Netif_LinkSemaphore = osSemaphoreCreate(osSemaphore(Netif_SEM) , 1 );

  link_arg.netif = &gnetif;
  link_arg.semaphore = Netif_LinkSemaphore;
  /* Create the Ethernet link handler thread */
  osThreadDef(LinkThr, ethernetif_set_link, osPriorityNormal, 0, configMINIMAL_STACK_SIZE * 2);
  osThreadCreate (osThread(LinkThr), &link_arg);

  /* Start DHCP negotiation for a network interface (IPv4) */
  dhcp_start(&gnetif);

/* USER CODE BEGIN 3 */

/* USER CODE END 3 */
}
/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/