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 char mac_addr[18];
00039 static bool connected = false;
00040 static bool use_dhcp = false;
00041 
00042 static void tcpip_init_done(void *arg)
00043 {
00044     tcpip_inited.release();
00045 }
00046 
00047 static void netif_status_callback(struct netif *netif)
00048 {
00049     strcpy(ip_addr, inet_ntoa(netif->ip_addr));
00050     connected = netif_is_up(netif) ? true : false;
00051     netif_inited.release();
00052 }
00053 static void init_netif(ip_addr_t *ipaddr, ip_addr_t *netmask, ip_addr_t *gw)
00054 {
00055     tcpip_init(tcpip_init_done, NULL);
00056     tcpip_inited.wait();
00057 
00058     memset((void*) &lpcNetif, 0, sizeof(lpcNetif));
00059     netif_add(&lpcNetif, ipaddr, netmask, gw, NULL, lpc_enetif_init, tcpip_input);
00060     netif_set_default(&lpcNetif);
00061     netif_set_status_callback(&lpcNetif, netif_status_callback);
00062 }
00063 
00064 EthernetInterface::EthernetInterface()
00065 {
00066     char mac[6];
00067     mbed_mac_address(mac);
00068     snprintf(mac_addr, 18, "%02x:%02x:%02x:%02x:%02x:%02x\r\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
00069 }
00070 
00071 int EthernetInterface::init()
00072 {
00073     use_dhcp = true;
00074     init_netif(NULL, NULL, NULL);
00075     return 0;
00076 }
00077 
00078 int EthernetInterface::init(const char* ip, const char* mask, const char* gateway)
00079 {
00080     use_dhcp = false;
00081     ip_addr_t ip_n, mask_n, gateway_n;
00082     inet_aton(ip, &ip_n);
00083     inet_aton(mask, &mask_n);
00084     inet_aton(gateway, &gateway_n);
00085     init_netif(&ip_n, &mask_n, &gateway_n);
00086     return 0;
00087 }
00088 
00089 int EthernetInterface::connect(unsigned int timeout_ms)
00090 {
00091     NVIC_SetPriority(ENET_IRQn, ((0x01 << 3) | 0x01));
00092     NVIC_EnableIRQ(ENET_IRQn);
00093 
00094     if (use_dhcp) {
00095         dhcp_start(&lpcNetif);
00096     } else {
00097         netif_set_up(&lpcNetif);
00098     }
00099 
00100     // -1: error, 0: timeout
00101     int inited = netif_inited.wait(timeout_ms);
00102     return (inited > 0) ? (0) : (-1);
00103 }
00104 
00105 int EthernetInterface::disconnect()
00106 {
00107     if (use_dhcp) {
00108         dhcp_release(&lpcNetif);
00109         dhcp_stop(&lpcNetif);
00110     } else {
00111         netif_set_down(&lpcNetif);
00112     }
00113 
00114     NVIC_DisableIRQ(ENET_IRQn);
00115 
00116     return 0;
00117 }
00118 
00119 char* EthernetInterface::getIPAddress()
00120 {
00121     return (connected) ? (ip_addr) : (NULL);
00122 }
00123 
00124 char* EthernetInterface::getMACAddress()
00125 {
00126     return mac_addr;
00127 }