/**
  ******************************************************************************
  * @file    netconf.c
  * @author  MCD Application Team
  * @version V1.0.0
  * @date    31-October-2011
  * @brief   Network connection configuration
  ******************************************************************************
  * @attention
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "lwip/mem.h"
#include "lwip/memp.h"
#include "lwip/tcp.h"
#include "lwip/udp.h"
#include "netif/etharp.h"
#include "lwip/dhcp.h"
#include "ethernetif.h"
#include "main.h"
#include "netconf.h"
#include <stdio.h>

/* Private typedef -----------------------------------------------------------*/
#define MAX_DHCP_TRIES        4

/* Private define ------------------------------------------------------------*/
typedef enum 
{ 
  DHCP_START=0,
  DHCP_WAIT_ADDRESS,
  DHCP_ADDRESS_ASSIGNED,
  DHCP_TIMEOUT
} 
DHCP_State_TypeDef;
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
struct netif netif;
uint32_t TCPTimer = 0;
uint32_t ARPTimer = 0;
uint32_t IPaddress = 0;

#ifdef USE_DHCP
uint32_t DHCPfineTimer = 0;
uint32_t DHCPcoarseTimer = 0;
DHCP_State_TypeDef DHCP_state = DHCP_START;
#endif

/* Private functions ---------------------------------------------------------*/
void LwIP_DHCP_Process_Handle(void);
/**
  * @brief  Initializes the lwIP stack
  * @param  None
  * @retval None
  */
void LwIP_Init(void)
{
  struct ip_addr ipaddr;
  struct ip_addr netmask;
  struct ip_addr gw;

#ifndef USE_DHCP
 #ifdef USE_LCD  
  uint8_t iptab[4];
  uint8_t iptxt[20];
 #endif /* USE_LCD */
#endif /* USE_DHCP */

  /* Initializes the dynamic memory heap defined by MEM_SIZE.*/
  mem_init();

  /* Initializes the memory pools defined by MEMP_NUM_x.*/
  memp_init();

#ifdef USE_DHCP
  ipaddr.addr = 0;
  netmask.addr = 0;
  gw.addr = 0;
#else
  IP4_ADDR(&ipaddr, IP_ADDR0, IP_ADDR1, IP_ADDR2, IP_ADDR3);
  IP4_ADDR(&netmask, NETMASK_ADDR0, NETMASK_ADDR1 , NETMASK_ADDR2, NETMASK_ADDR3);
  IP4_ADDR(&gw, GW_ADDR0, GW_ADDR1, GW_ADDR2, GW_ADDR3);

 #ifdef USE_LCD  
   iptab[0] = IP_ADDR3;
   iptab[1] = IP_ADDR2;
   iptab[2] = IP_ADDR1;
   iptab[3] = IP_ADDR0;

   sprintf((char*)iptxt, "  %d.%d.%d.%d", iptab[3], iptab[2], iptab[1], iptab[0]); 
      
   LCD_DisplayStringLine(Line8, (uint8_t*)"  Static IP address   ");
   LCD_DisplayStringLine(Line9, iptxt);
 #endif /* USE_LCD */
#endif /* USE_DHCP */

  /* - netif_add(struct netif *netif, struct ip_addr *ipaddr,
            struct ip_addr *netmask, struct ip_addr *gw,
            void *state, err_t (* init)(struct netif *netif),
            err_t (* input)(struct pbuf *p, struct netif *netif))
    
   Adds your network interface to the netif_list. Allocate a struct
  netif and pass a pointer to this structure as the first argument.
  Give pointers to cleared ip_addr structures when using DHCP,
  or fill them with sane numbers otherwise. The state pointer may be NULL.

  The init function pointer must point to a initialization function for
  your ethernet netif interface. The following code illustrates it's use.*/
  netif_add(&netif, &ipaddr, &netmask, &gw, NULL, &ethernetif_init, &ethernet_input);

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

  /*  When the netif is fully configured this function must be called.*/
  netif_set_up(&netif);
}

/**
  * @brief  Called when a frame is received
  * @param  None
  * @retval None
  */
void LwIP_Pkt_Handle(void)
{
  /* Read a received packet from the Ethernet buffers and send it to the lwIP for handling */
  ethernetif_input(&netif);
}

/**
  * @brief  LwIP periodic tasks
  * @param  localtime the current LocalTime value
  * @retval None
  */
void LwIP_Periodic_Handle(__IO uint32_t localtime)
{
#if LWIP_TCP
  /* TCP periodic process every 250 ms */
  if (localtime - TCPTimer >= TCP_TMR_INTERVAL)
  {
    TCPTimer =  localtime;
    tcp_tmr();
  }
#endif
  
  /* ARP periodic process every 5s */
  if ((localtime - ARPTimer) >= ARP_TMR_INTERVAL)
  {
    ARPTimer =  localtime;
    etharp_tmr();
  }

#ifdef USE_DHCP
  /* Fine DHCP periodic process every 500ms */
  if (localtime - DHCPfineTimer >= DHCP_FINE_TIMER_MSECS)
  {
    DHCPfineTimer =  localtime;
    dhcp_fine_tmr();
    if ((DHCP_state != DHCP_ADDRESS_ASSIGNED)&&(DHCP_state != DHCP_TIMEOUT))
    { 
      /* toggle LED1 to indicate DHCP on-going process */
      STM_EVAL_LEDToggle(LED1);
      
      /* process DHCP state machine */
      LwIP_DHCP_Process_Handle();    
    }
  }

  /* DHCP Coarse periodic process every 60s */
  if (localtime - DHCPcoarseTimer >= DHCP_COARSE_TIMER_MSECS)
  {
    DHCPcoarseTimer =  localtime;
    dhcp_coarse_tmr();
  }
  
#endif
}

#ifdef USE_DHCP
/**
  * @brief  LwIP_DHCP_Process_Handle
  * @param  None
  * @retval None
  */
void LwIP_DHCP_Process_Handle()
{
  struct ip_addr ipaddr;
  struct ip_addr netmask;
  struct ip_addr gw;
  uint8_t iptab[4];
  uint8_t iptxt[20];

  switch (DHCP_state)
  {
    case DHCP_START:
    {
      dhcp_start(&netif);
      IPaddress = 0;
      DHCP_state = DHCP_WAIT_ADDRESS;
#ifdef USE_LCD
      LCD_DisplayStringLine(Line4, (uint8_t*)"     Looking for    ");
      LCD_DisplayStringLine(Line5, (uint8_t*)"     DHCP server    ");
      LCD_DisplayStringLine(Line6, (uint8_t*)"     please wait... ");
#endif
    }
    break;

    case DHCP_WAIT_ADDRESS:
    {
      /* Read the new IP address */
      IPaddress = netif.ip_addr.addr;

      if (IPaddress!=0) 
      {
        DHCP_state = DHCP_ADDRESS_ASSIGNED;	

        /* Stop DHCP */
        dhcp_stop(&netif);

#ifdef USE_LCD      
        iptab[0] = (uint8_t)(IPaddress >> 24);
        iptab[1] = (uint8_t)(IPaddress >> 16);
        iptab[2] = (uint8_t)(IPaddress >> 8);
        iptab[3] = (uint8_t)(IPaddress);

        sprintf((char*)iptxt, " %d.%d.%d.%d", iptab[3], iptab[2], iptab[1], iptab[0]);       

        LCD_ClearLine(Line4);
        LCD_ClearLine(Line5);
        LCD_ClearLine(Line6);

        /* Display the IP address */
        LCD_DisplayStringLine(Line7, (uint8_t*)"IP address assigned ");
        LCD_DisplayStringLine(Line8, (uint8_t*)"  by a DHCP server  ");
        LCD_DisplayStringLine(Line9, iptxt);
#endif
        STM_EVAL_LEDOn(LED1);
      }
      else
      {
        /* DHCP timeout */
        if (netif.dhcp->tries > MAX_DHCP_TRIES)
        {
          DHCP_state = DHCP_TIMEOUT;

          /* Stop DHCP */
          dhcp_stop(&netif);

          /* Static address used */
          IP4_ADDR(&ipaddr, IP_ADDR0 ,IP_ADDR1 , IP_ADDR2 , IP_ADDR3 );
          IP4_ADDR(&netmask, NETMASK_ADDR0, NETMASK_ADDR1, NETMASK_ADDR2, NETMASK_ADDR3);
          IP4_ADDR(&gw, GW_ADDR0, GW_ADDR1, GW_ADDR2, GW_ADDR3);
          netif_set_addr(&netif, &ipaddr , &netmask, &gw);

#ifdef USE_LCD   
          LCD_DisplayStringLine(Line7, (uint8_t*)"    DHCP timeout    ");

          iptab[0] = IP_ADDR3;
          iptab[1] = IP_ADDR2;
          iptab[2] = IP_ADDR1;
          iptab[3] = IP_ADDR0;

          sprintf((char*)iptxt, "  %d.%d.%d.%d", iptab[3], iptab[2], iptab[1], iptab[0]); 

          LCD_ClearLine(Line4);
          LCD_ClearLine(Line5);
          LCD_ClearLine(Line6);

          LCD_DisplayStringLine(Line8, (uint8_t*)"  Static IP address   ");
          LCD_DisplayStringLine(Line9, iptxt);         
#endif    
          STM_EVAL_LEDOn(LED1);
        }
      }
    }
    break;
    default: break;
  }
}
#endif      

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
