void LwIP_Init(void)
{
struct ip_addr ipaddr; //IP地址
struct ip_addr netmask; //子掩码
struct ip_addr gw; //网关地址
uint8_t macaddress[6]={0,0,0,0,0,1};//以太网控制器物理地址，即MAC地址
/* 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
ipaddr.addr = 0;
netmask.addr = 0;
gw.addr = 0;
#else
IP4_ADDR(&ipaddr, 192, 168, 1, 200);
IP4_ADDR(&netmask, 255, 255, 255, 0);
IP4_ADDR(&gw, 192, 168, 1, 1);
#endif
Set_MAC_Address(macaddress);
/* - 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, ðernetif_init, ðernet_input);
/*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);
tcp_client_init();
}
/**
* @briefCalled when a frame is received
* @paramNone
* @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);
}
/**
* @briefLwIP periodic tasks
* @paramlocaltime the current LocalTime value
* @retval None
*/
void LwIP_Periodic_Handle(__IO uint32_t localtime)
{
/* TCP periodic process every 250 ms */
if (localtime - TCPTimer >= TCP_TMR_INTERVAL)
{
TCPTimer =localtime;
tcp_tmr();
}
/* ARP periodic process every 5s */
if (localtime - ARPTimer >= ARP_TMR_INTERVAL)
{
ARPTimer =localtime;
etharp_tmr();
}
#if LWIP_DHCP
/* Fine DHCP periodic process every 500ms */
if (localtime - DHCPfineTimer >= DHCP_FINE_TIMER_MSECS)
{
DHCPfineTimer =localtime;
dhcp_fine_tmr();
}
/* DHCP Coarse periodic process every 60s */
if (localtime - DHCPcoarseTimer >= DHCP_COARSE_TIMER_MSECS)
{
DHCPcoarseTimer =localtime;
dhcp_coarse_tmr();
}
#endif
}
/**
* @briefLCD & LEDs periodic handling
* @paramlocaltime: the current LocalTime value
* @retval None
*/
void Display_Periodic_Handle(__IO uint32_t localtime)
{
/* 250 ms */
if (localtime - DisplayTimer >= LCD_TIMER_MSECS)
{
DisplayTimer = localtime;
#if LWIP_DHCP
/* We have got a new IP address so update the display */
if (IPaddress != netif.ip_addr.addr)
{
/* Read the new IP address */
IPaddress = netif.ip_addr.addr;
/* Display the new IP address */
if (netif.flags & NETIF_FLAG_DHCP)
{
tcp_client_init();
}
}
else if (IPaddress == 0)
{
/* If no response from a DHCP server for MAX_DHCP_TRIES times */
/* stop the dhcp client and set a static IP address */
if (netif.dhcp->tries > MAX_DHCP_TRIES)
{
struct ip_addr ipaddr;
struct ip_addr netmask;
struct ip_addr gw;
dhcp_stop(&netif);
IP4_ADDR(&ipaddr, 192, 168, 1, 8);
IP4_ADDR(&netmask, 255, 255, 255, 201);
IP4_ADDR(&gw, 192, 168, 1, 1);
netif_set_addr(&netif, &ipaddr , &netmask, &gw);
}
}
#endif
}
}
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