/**
  **************************************************************************
  * @file     netconf.c
  * @version  v2.0.4
  * @date     2021-12-31
  * @brief    network connection configuration
  **************************************************************************
  *                       Copyright notice & Disclaimer
  *
  * The software Board Support Package (BSP) that is made available to 
  * download from Artery official website is the copyrighted work of Artery. 
  * Artery authorizes customers to use, copy, and distribute the BSP 
  * software and its related documentation for the purpose of design and 
  * development in conjunction with Artery microcontrollers. Use of the 
  * software is governed by this copyright notice and the following disclaimer.
  *
  * THIS SOFTWARE IS PROVIDED ON "AS IS" BASIS WITHOUT WARRANTIES,
  * GUARANTEES OR REPRESENTATIONS OF ANY KIND. ARTERY EXPRESSLY DISCLAIMS,
  * TO THE FULLEST EXTENT PERMITTED BY LAW, ALL EXPRESS, IMPLIED OR
  * STATUTORY OR OTHER WARRANTIES, GUARANTEES OR REPRESENTATIONS,
  * INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
  *
  **************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "lwip/memp.h"
#include "lwip/tcp.h"
#include "lwip/priv/tcp_priv.h"
#include "lwip/udp.h"
#include "netif/etharp.h"
#include "lwip/dhcp.h"
#include "ethernetif.h"
#include "../Inc/netconf.h"
#include "stdio.h"
#include "SystemDelayInterface.h"

/** @addtogroup AT32F437_periph_examples
  * @{
  */

/** @addtogroup 437_EMAC_tcp_server
  * @{
  */

/** @addtogroup network_configuration
  * @{
  */

/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
#define MAC_ADDR_LENGTH                  (6)
#define ADDR_LENGTH                      (4)
/* Private variables ---------------------------------------------------------*/
struct netif netif;
volatile uint32_t tcp_timer = 0;
volatile uint32_t arp_timer = 0;

static uint8_t mac_address[MAC_ADDR_LENGTH] = {0xf4, 0xb5, 0x20, 0x5a, 0x18, 0x30};
//55:38:39:45:56:01
//f4:b5:20:5a:18:30
#if LWIP_DHCP
volatile uint32_t dhcp_fine_timer = 0;
volatile uint32_t dhcp_coarse_timer = 0;
#else
static uint8_t local_ip[ADDR_LENGTH] = {192, 168, 1, 20};
static uint8_t local_gw[ADDR_LENGTH] = {192, 168, 1, 1};
static uint8_t local_mask[ADDR_LENGTH] = {255, 255, 255, 0};
#endif

/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  initializes the lwip stack
  * @param  none
  * @retval none
  */
void tcpip_stack_init(uint16_t data) {
    ip_addr_t ipaddr;
    ip_addr_t netmask;
    ip_addr_t gw;

    mac_address[4] = data >> 8;
    mac_address[5] = data;

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

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


#if LWIP_DHCP  //need DHCP server
    ipaddr.addr = 0;
    netmask.addr = 0;
    gw.addr = 0;

#else
    IP4_ADDR(&ipaddr, local_ip[0], local_ip[1], local_ip[2], local_ip[3]);
    IP4_ADDR(&netmask, local_mask[0], local_mask[1], local_mask[2], local_mask[3]);
    IP4_ADDR(&gw, local_gw[0], local_gw[1], local_gw[2], local_gw[3]);
#endif

    lwip_set_mac_address(mac_address);

    /* - 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.*/

    if (netif_add(&netif, &ipaddr, &netmask, &gw, NULL, &ethernetif_init, &netif_input) == NULL) {
        while (1);
    }

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

#if LWIP_DHCP
    /*  Creates a new DHCP client for this interface on the first call.
    Note: you must call dhcp_fine_tmr() and dhcp_coarse_tmr() at
    the predefined regular intervals after starting the client.
    You can peek in the netif->dhcp struct for the actual DHCP status.*/
    dhcp_start(&netif);
#endif

    /*  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 */
    if (ethernetif_input(&netif) != ERR_OK) {
        while (1);
    }
}

/**
  * @brief  lwip periodic tasks
  * @param  localtime the current localtime value
  * @retval none
  */
void lwip_periodic_handle(volatile uint32_t localtime) {

    /* TCP periodic process every 250 ms */
    if (localtime - tcp_timer >= TCP_TMR_INTERVAL) {
        tcp_timer = localtime;
        tcp_tmr();
    }
    /* ARP periodic process every 5s */
    if (localtime - arp_timer >= ARP_TMR_INTERVAL) {
        arp_timer = localtime;
        etharp_tmr();
    }

#if LWIP_DHCP
    /* Fine DHCP periodic process every 500ms */
    if (localtime - dhcp_fine_timer >= DHCP_FINE_TIMER_MSECS)
    {
      dhcp_fine_timer =  localtime;
      dhcp_fine_tmr();
    }
    /* DHCP Coarse periodic process every 60s */
    if (localtime - dhcp_coarse_timer >= DHCP_COARSE_TIMER_MSECS)
    {
      dhcp_coarse_timer =  localtime;
      dhcp_coarse_tmr();
    }
#endif
}

/**
  * @}
  */

/**
  * @}
  */
/**
  * @}
  */