Rod Coleman
Not Recommended for Use, but demonstrates raw API of LwIP. Needs mbed library 26
Dependencies: lwip-mbed-2010 mbed
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main.cpp
00001 #include "mbed.h" 00002 #include "lwip/opt.h" 00003 #include "lwip/stats.h" 00004 #include "lwip/sys.h" 00005 #include "lwip/pbuf.h" 00006 #include "lwip/udp.h" 00007 #include "lwip/tcp.h" 00008 #include "lwip/dns.h" 00009 #include "lwip/dhcp.h" 00010 #include "lwip/init.h" 00011 #include "lwip/netif.h" 00012 #include "netif/etharp.h" 00013 #include "netif/loopif.h" 00014 #include "device.h" 00015 00016 Ethernet ethernet; 00017 DigitalOut ledLink(p30); 00018 DigitalOut ledActivity(p29); 00019 DigitalOut ledStage0 (LED1); 00020 DigitalOut ledStage1 (LED2); 00021 DigitalOut ledStage2 (LED3); 00022 DigitalOut ledTCP80 (LED4); 00023 Serial pc(USBTX, USBRX); 00024 volatile char stage = 0; 00025 00026 Ticker stage_blinker; 00027 00028 struct netif netif_data; 00029 00030 const char testPage[] = "HTTP/1.1 200 OK\r\n" 00031 "Content-Type: text/html\r\n" 00032 "Connection: Close\r\n\r\n" 00033 "<html>" 00034 "<head>" 00035 "<title>mbed test page</title>" 00036 "<style type='text/css'>" 00037 "body{font-family:'Arial, sans-serif', sans-serif;font-size:.8em;background-color:#fff;}" 00038 "</style>" 00039 "</head>" 00040 "<body>%s</body></html>\r\n\r\n"; 00041 00042 char buffer[1024]; 00043 char temp[1024]; 00044 err_t recv_callback(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) { 00045 struct netif *netif = &netif_data; 00046 ledTCP80 = true; 00047 printf("TCP callback from %d.%d.%d.%d\r\n", ip4_addr1(&(pcb->remote_ip)),ip4_addr2(&(pcb->remote_ip)),ip4_addr3(&(pcb->remote_ip)),ip4_addr4(&(pcb->remote_ip))); 00048 char *data; 00049 /* Check if status is ok and data is arrived. */ 00050 if (err == ERR_OK && p != NULL) { 00051 /* Inform TCP that we have taken the data. */ 00052 tcp_recved(pcb, p->tot_len); 00053 data = static_cast<char *>(p->payload); 00054 /* If the data is a GET request we can handle it. */ 00055 if (strncmp(data, "GET ", 4) == 0) { 00056 printf("Handling GET request...\r\n"); 00057 printf("Request:\r\n%s\r\n", data); 00058 00059 //generate the test page 00060 time_t seconds = time(NULL); 00061 sprintf(temp, "<h1>Congratulations!</h1>If you can see this page, your mbed is working properly." 00062 "<h2>mbed Configuration</h2>" 00063 "mbed RTC time:%s<br/>" 00064 "mbed HW address: %02x:%02x:%02x:%02x:%02x:%02x<br/>" 00065 "mbed IP Address: %s<br/>", 00066 ctime(&seconds), 00067 (char*) netif->hwaddr[0], 00068 (char*) netif->hwaddr[1], 00069 (char*) netif->hwaddr[2], 00070 (char*) netif->hwaddr[3], 00071 (char*) netif->hwaddr[4], 00072 (char*) netif->hwaddr[5], 00073 inet_ntoa(*(struct in_addr*)&(netif->ip_addr)) 00074 ); 00075 sprintf(buffer, testPage, temp); 00076 if (tcp_write(pcb, (void *)buffer, strlen(buffer), 1) == ERR_OK) { 00077 tcp_output(pcb); 00078 printf("Closing connection...\r\n"); 00079 tcp_close(pcb); 00080 } 00081 } 00082 else 00083 { 00084 printf("Non GET request...\r\nRequest:\r\n%s\r\n", data); 00085 } 00086 00087 pbuf_free(p); 00088 } 00089 00090 else { 00091 /* No data arrived */ 00092 /* That means the client closes the connection and sent us a packet with FIN flag set to 1. */ 00093 /* We have to cleanup and destroy out TCPConnection. */ 00094 printf("Connection closed by client.\r\n"); 00095 pbuf_free(p); 00096 } 00097 /* Don't panic! Everything is fine. */ 00098 ledTCP80 = false; 00099 return ERR_OK; 00100 } 00101 /* Accept an incomming call on the registered port */ 00102 err_t accept_callback(void *arg, struct tcp_pcb *npcb, err_t err) { 00103 LWIP_UNUSED_ARG(arg); 00104 /* Subscribe a receive callback function */ 00105 tcp_recv(npcb, &recv_callback); 00106 /* Don't panic! Everything is fine. */ 00107 return ERR_OK; 00108 } 00109 00110 void stageblinker() 00111 { 00112 switch (stage) 00113 { 00114 case 0: 00115 ledStage0 = !ledStage0; 00116 ledStage1 = false; 00117 ledStage2 = false; 00118 break; 00119 case 1: 00120 ledStage0 = true; 00121 ledStage1 = !ledStage1; 00122 ledStage2 = false; 00123 break; 00124 case 2: 00125 ledStage0 = true; 00126 ledStage1 = true; 00127 ledStage2 = true; 00128 stage_blinker.detach(); 00129 break; 00130 } 00131 } 00132 00133 int main() { 00134 pc.baud(115200); 00135 printf("mBed Ethernet Tester 1.0\r\nStarting Up...\r\n"); 00136 stage = 0; 00137 struct netif *netif = &netif_data; 00138 struct ip_addr ipaddr; 00139 struct ip_addr netmask; 00140 struct ip_addr gateway; 00141 Ticker tickFast, tickSlow, tickARP, eth_tick, dns_tick, dhcp_coarse, dhcp_fine; 00142 stage_blinker.attach_us(&stageblinker, 1000*500); 00143 00144 char *hostname = "my-mbed"; 00145 00146 printf("Configuring device for DHCP...\r\n"); 00147 /* Start Network with DHCP */ 00148 IP4_ADDR(&netmask, 255,255,255,255); 00149 IP4_ADDR(&gateway, 0,0,0,0); 00150 IP4_ADDR(&ipaddr, 0,0,0,0); 00151 /* Initialise after configuration */ 00152 lwip_init(); 00153 netif->hwaddr_len = ETHARP_HWADDR_LEN; 00154 device_address((char *)netif->hwaddr); 00155 netif = netif_add(netif, &ipaddr, &netmask, &gateway, NULL, device_init, ip_input); 00156 netif->hostname = hostname; 00157 netif_set_default(netif); 00158 dhcp_start(netif); // <-- Use DHCP 00159 00160 /* Initialise all needed timers */ 00161 tickARP.attach_us( ðarp_tmr, ARP_TMR_INTERVAL * 1000); 00162 tickFast.attach_us(&tcp_fasttmr, TCP_FAST_INTERVAL * 1000); 00163 tickSlow.attach_us(&tcp_slowtmr, TCP_SLOW_INTERVAL * 1000); 00164 dns_tick.attach_us(&dns_tmr, DNS_TMR_INTERVAL * 1000); 00165 dhcp_coarse.attach_us(&dhcp_coarse_tmr, DHCP_COARSE_TIMER_MSECS * 1000); 00166 dhcp_fine.attach_us(&dhcp_fine_tmr, DHCP_FINE_TIMER_MSECS * 1000); 00167 stage = 1; 00168 while (!netif_is_up(netif)) { 00169 ledLink = ethernet.link(); 00170 device_poll(); 00171 } 00172 00173 /* 00174 while (!(netif->dhcp->state == DHCP_BOUND || netif->dhcp->state == DHCP_PERMANENT)) 00175 { 00176 ledLink = ethernet.link(); 00177 device_poll(); 00178 //printf("Waiting for DHCP response, state = %d\r\n", netif->dhcp->state); 00179 //wait_ms(100); 00180 } 00181 */ 00182 stage = 2; 00183 printf("Interface is up, local IP is %s\r\n", 00184 inet_ntoa(*(struct in_addr*)&(netif->ip_addr))); 00185 00186 printf("Starting Web Server...\r\n"); 00187 00188 /* Bind a function to a tcp port */ 00189 struct tcp_pcb *pcb = tcp_new(); 00190 if (tcp_bind(pcb, IP_ADDR_ANY, 80) == ERR_OK) { 00191 pcb = tcp_listen(pcb); 00192 tcp_accept(pcb, &accept_callback); 00193 } 00194 00195 printf("Waiting for connection...\r\n"); 00196 while(1) { 00197 device_poll(); 00198 ledLink = ethernet.link(); 00199 } 00200 }
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