mbed IP library over Ethernet
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 Semaphore tcpip_inited(0); 00035 static Semaphore netif_inited(0); 00036 00037 static char ip_addr[16]; 00038 static bool connected; 00039 static bool use_dhcp = false; 00040 00041 static void tcpip_init_done(void *arg) { 00042 tcpip_inited.release(); 00043 } 00044 static void netif_status_callback(struct netif *netif) { 00045 strcpy(ip_addr, inet_ntoa(netif->ip_addr)); 00046 connected = netif_is_up(netif) ? true : false; 00047 netif_inited.release(); 00048 } 00049 static void init_netif(ip_addr_t *ipaddr, ip_addr_t *netmask, ip_addr_t *gw) { 00050 tcpip_init(tcpip_init_done, NULL); 00051 tcpip_inited.wait(); 00052 00053 memset((void*) &lpcNetif, 0, sizeof(lpcNetif)); 00054 netif_add(&lpcNetif, ipaddr, netmask, gw, NULL, lpc_enetif_init, tcpip_input); 00055 netif_set_default(&lpcNetif); 00056 netif_set_status_callback(&lpcNetif, netif_status_callback); 00057 } 00058 00059 int EthernetInterface::init() { 00060 use_dhcp = true; 00061 init_netif(NULL, NULL, NULL); 00062 return 0; 00063 } 00064 00065 int EthernetInterface::init(const char* ip, const char* mask, const char* gateway) { 00066 use_dhcp = false; 00067 ip_addr_t ip_n, mask_n, gateway_n; 00068 inet_aton(ip, &ip_n); 00069 inet_aton(mask, &mask_n); 00070 inet_aton(gateway, &gateway_n); 00071 init_netif(&ip_n, &mask_n, &gateway_n); 00072 return 0; 00073 } 00074 00075 int EthernetInterface::connect(unsigned int timeout_ms) { 00076 NVIC_SetPriority(ENET_IRQn, ((0x01 << 3) | 0x01)); 00077 NVIC_EnableIRQ(ENET_IRQn); 00078 00079 if (use_dhcp) { 00080 dhcp_start(&lpcNetif); 00081 } else { 00082 netif_set_up(&lpcNetif); 00083 } 00084 00085 // -1: error, 0: timeout 00086 int inited = netif_inited.wait(timeout_ms); 00087 return (inited > 0) ? (0) : (-1); 00088 } 00089 00090 int EthernetInterface::disconnect() { 00091 if (use_dhcp) { 00092 dhcp_release(&lpcNetif); 00093 dhcp_stop(&lpcNetif); 00094 } else { 00095 netif_set_down(&lpcNetif); 00096 } 00097 00098 NVIC_DisableIRQ(ENET_IRQn); 00099 00100 return 0; 00101 } 00102 00103 char* EthernetInterface::getIPAddress() { 00104 return (connected) ? (ip_addr) : (NULL); 00105 }
Generated on Sat Jul 23 2022 02:40:02 by 1.7.2