1void 2eth_mac_irq() 3{ 4 /* Service MAC IRQ here */ 5 6 /* Allocate pbuf from pool (avoid using heap in interrupts) */ 7 struct pbuf* p = pbuf_alloc(PBUF_RAW, eth_data_count, PBUF_POOL); 8 9 if(p != NULL) { 10 /* Copy ethernet frame into pbuf */ 11 pbuf_take(p, eth_data, eth_data_count); 12 13 /* Put in a queue which is processed in main loop */ 14 if(!queue_try_put(&queue, p)) { 15 /* queue is full -> packet loss */ 16 pbuf_free(p); 17 } 18 } 19} 20 21static err_t 22netif_output(struct netif *netif, struct pbuf *p) 23{ 24 LINK_STATS_INC(link.xmit); 25 26 /* Update SNMP stats (only if you use SNMP) */ 27 MIB2_STATS_NETIF_ADD(netif, ifoutoctets, p->tot_len); 28 int unicast = ((p->payload[0] & 0x01) == 0); 29 if (unicast) { 30 MIB2_STATS_NETIF_INC(netif, ifoutucastpkts); 31 } else { 32 MIB2_STATS_NETIF_INC(netif, ifoutnucastpkts); 33 } 34 35 lock_interrupts(); 36 pbuf_copy_partial(p, mac_send_buffer, p->tot_len, 0); 37 /* Start MAC transmit here */ 38 unlock_interrupts(); 39 40 return ERR_OK; 41} 42 43static void 44netif_status_callback(struct netif *netif) 45{ 46 printf("netif status changed %s\n", ip4addr_ntoa(netif_ip4_addr(netif))); 47} 48 49static err_t 50netif_init(struct netif *netif) 51{ 52 netif->linkoutput = netif_output; 53 netif->output = etharp_output; 54 netif->output_ip6 = ethip6_output; 55 netif->mtu = ETHERNET_MTU; 56 netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET | NETIF_FLAG_IGMP | NETIF_FLAG_MLD6; 57 MIB2_INIT_NETIF(netif, snmp_ifType_ethernet_csmacd, 100000000); 58 59 SMEMCPY(netif->hwaddr, your_mac_address_goes_here, ETH_HWADDR_LEN); 60 netif->hwaddr_len = ETH_HWADDR_LEN; 61 62 return ERR_OK; 63} 64 65void 66main(void) 67{ 68 struct netif netif; 69 70 lwip_init(); 71 72 netif_add(&netif, IP4_ADDR_ANY, IP4_ADDR_ANY, IP4_ADDR_ANY, NULL, netif_init, netif_input); 73 netif.name[0] = 'e'; 74 netif.name[1] = '0'; 75 netif_create_ip6_linklocal_address(&netif, 1); 76 netif.ip6_autoconfig_enabled = 1; 77 netif_set_status_callback(&netif, netif_status_callback); 78 netif_set_default(&netif); 79 netif_set_up(&netif); 80 81 /* Start DHCP and HTTPD */ 82 dhcp_start(&netif ); 83 httpd_init(); 84 85 while(1) { 86 /* Check link state, e.g. via MDIO communication with PHY */ 87 if(link_state_changed()) { 88 if(link_is_up()) { 89 netif_set_link_up(&netif); 90 } else { 91 netif_set_link_down(&netif); 92 } 93 } 94 95 /* Check for received frames, feed them to lwIP */ 96 lock_interrupts(); 97 struct pbuf* p = queue_try_get(&queue); 98 unlock_interrupts(); 99 100 if(p != NULL) { 101 LINK_STATS_INC(link.recv); 102 103 /* Update SNMP stats (only if you use SNMP) */ 104 MIB2_STATS_NETIF_ADD(netif, ifinoctets, p->tot_len); 105 int unicast = ((p->payload[0] & 0x01) == 0); 106 if (unicast) { 107 MIB2_STATS_NETIF_INC(netif, ifinucastpkts); 108 } else { 109 MIB2_STATS_NETIF_INC(netif, ifinnucastpkts); 110 } 111 112 if(netif.input(p, &netif) != ERR_OK) { 113 pbuf_free(p); 114 } 115 } 116 117 /* Cyclic lwIP timers check */ 118 sys_check_timeouts(); 119 120 /* your application goes here */ 121 } 122} 123