EthernetInterface
Dependencies: Socket lwip-eth lwip-sys lwip
Fork of EthernetInterface by
EthernetInterface.cpp
00001 /* EthernetInterface.cpp */ 00002 /* Copyright (C) 2012 mbed.org, MIT License 00003 * 00004 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 00005 * and associated documentation files (the "Software"), to deal in the Software without restriction, 00006 * including without limitation the rights to use, copy, modify, merge, publish, distribute, 00007 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 00008 * furnished to do so, subject to the following conditions: 00009 * 00010 * The above copyright notice and this permission notice shall be included in all copies or 00011 * substantial portions of the Software. 00012 * 00013 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 00014 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00015 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 00016 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00017 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00018 */ 00019 #include "EthernetInterface.h" 00020 00021 #include "lwip/inet.h" 00022 #include "lwip/netif.h" 00023 #include "netif/etharp.h" 00024 #include "lwip/dhcp.h" 00025 #include "arch/lpc17_emac.h" 00026 #include "lpc_phy.h" 00027 #include "lwip/tcpip.h" 00028 00029 #include "mbed.h" 00030 00031 /* TCP/IP and Network Interface Initialisation */ 00032 static struct netif lpcNetif; 00033 00034 static char ip_addr[16] = "\0"; 00035 static bool use_dhcp = false; 00036 00037 static Semaphore tcpip_inited(0); 00038 static Semaphore netif_linked(0); 00039 static Semaphore netif_up(0); 00040 00041 static void tcpip_init_done(void *arg) { 00042 tcpip_inited.release(); 00043 } 00044 00045 static void netif_link_callback(struct netif *netif) { 00046 if (netif_is_link_up(netif)) { 00047 netif_linked.release(); 00048 } 00049 } 00050 00051 static void netif_status_callback(struct netif *netif) { 00052 if (netif_is_up(netif)) { 00053 strcpy(ip_addr, inet_ntoa(netif->ip_addr)); 00054 netif_up.release(); 00055 } 00056 } 00057 00058 static void init_netif(ip_addr_t *ipaddr, ip_addr_t *netmask, ip_addr_t *gw) { 00059 tcpip_init(tcpip_init_done, NULL); 00060 tcpip_inited.wait(); 00061 00062 memset((void*) &lpcNetif, 0, sizeof(lpcNetif)); 00063 netif_add(&lpcNetif, ipaddr, netmask, gw, NULL, lpc_enetif_init, tcpip_input); 00064 netif_set_default(&lpcNetif); 00065 00066 netif_set_link_callback (&lpcNetif, netif_link_callback); 00067 netif_set_status_callback(&lpcNetif, netif_status_callback); 00068 } 00069 00070 int EthernetInterface::init() { 00071 use_dhcp = true; 00072 init_netif(NULL, NULL, NULL); 00073 return 0; 00074 } 00075 00076 int EthernetInterface::init(const char* ip, const char* mask, const char* gateway) { 00077 use_dhcp = false; 00078 strcpy(ip_addr, ip); 00079 00080 ip_addr_t ip_n, mask_n, gateway_n; 00081 inet_aton(ip, &ip_n); 00082 inet_aton(mask, &mask_n); 00083 inet_aton(gateway, &gateway_n); 00084 init_netif(&ip_n, &mask_n, &gateway_n); 00085 00086 return 0; 00087 } 00088 00089 int EthernetInterface::connect(unsigned int timeout_ms) { 00090 NVIC_SetPriority(ENET_IRQn, ((0x01 << 3) | 0x01)); 00091 NVIC_EnableIRQ(ENET_IRQn); 00092 00093 int inited; 00094 if (use_dhcp) { 00095 dhcp_start(&lpcNetif); 00096 00097 // Wait for an IP 00098 // -1: error, 0: timeout 00099 inited = netif_up.wait(timeout_ms); 00100 } else { 00101 netif_set_up(&lpcNetif); 00102 00103 // Wait for the link up 00104 inited = netif_linked.wait(timeout_ms); 00105 } 00106 00107 return (inited > 0) ? (0) : (-1); 00108 } 00109 00110 int EthernetInterface::disconnect() { 00111 if (use_dhcp) { 00112 dhcp_release(&lpcNetif); 00113 dhcp_stop(&lpcNetif); 00114 } else { 00115 netif_set_down(&lpcNetif); 00116 } 00117 00118 NVIC_DisableIRQ(ENET_IRQn); 00119 00120 return 0; 00121 } 00122 00123 char* EthernetInterface::getIPAddress() { 00124 return ip_addr; 00125 }
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