main.cpp

00001 #include "mbed.h"
00002 #include "EthernetInterface.h"
00003 
00004 #define MAC     "\x00\x08\xDC\x55\x51\x52"
00005 #define IP      "192.168.0.20"
00006 #define SUBNET  "255.255.255.0"
00007 #define GATEWAY "192.168.0.1"
00008 
00009 #define ECHO_SERVER_PORT    5000
00010 
00011 //#define USE_DHCP
00012 
00013 #define FLAG_LED_BLINK      3
00014 #define FLAG_LED_ON         2
00015 #define FLAG_LED_OFF        1
00016 #define FLAG_INVALID_CMD    0
00017 
00018 #define LED_ON              0
00019 #define LED_OFF             1
00020 
00021 void led_switch(void);
00022 
00023 Ticker time_up;
00024 
00025 /* LED Pin Configuration */
00026 DigitalOut myled(LED1, LED_OFF);
00027 
00028 /* UART Pin Configuration */
00029 Serial pc(USBTX, USBRX);    
00030 
00031  // LED control if received message matches pre-defined commands
00032 char cmd_ledon[] = {'L', 'E', 'D', '_', 'O', 'N', '\0'};
00033 char cmd_ledoff[] = {'L', 'E', 'D', '_', 'O', 'F', 'F', '\0'};
00034 char cmd_ledblink[] = {'L', 'E', 'D', '_', 'B', 'L', 'I', 'N', 'K', '\0'};
00035 
00036 int flag; // LED status flag
00037 
00038 void led_switch(void)
00039 {
00040     if(flag == FLAG_LED_BLINK) {
00041         myled=!myled;       
00042     }
00043 }
00044 
00045 int main (void) 
00046 {
00047     /* Serial baudrate configuration */
00048     pc.baud(115200);
00049     
00050     // mbed Ticker
00051     time_up.attach(&led_switch, 0.2);
00052 
00053     pc.printf("Wait a second...\r\n\r\n");
00054       
00055     // Ethernet  
00056     EthernetInterface eth;    
00057 #ifdef USE_DHCP
00058     eth.init(MAC); // Use DHCP
00059 #else
00060     eth.init((uint8_t*)MAC, IP, SUBNET, GATEWAY); // Use Static IP address
00061 #endif    
00062     eth.connect();
00063     
00064     pc.printf("Server IP Address is %s : %d\r\n", eth.getIPAddress(), ECHO_SERVER_PORT);
00065     
00066     pc.printf("Command #1: %s\r\n", cmd_ledon);
00067     pc.printf("Command #2: %s\r\n", cmd_ledoff);
00068     pc.printf("Command #3: %s\r\n", cmd_ledblink);
00069     pc.printf("\r\n");
00070     
00071     TCPSocketServer server;
00072     server.bind(ECHO_SERVER_PORT);
00073     server.listen();
00074     
00075     while (true) 
00076     {
00077         pc.printf("Wait for new connection...\r\n");
00078         TCPSocketConnection client;
00079         server.accept(client);
00080         client.set_blocking(false, 15000); // Timeout after (1.5)s
00081         
00082         pc.printf("Connection from: %s\r\n", client.get_address());
00083         printf("\r\n");
00084         
00085         char buffer[256];
00086         while (true) {
00087             int n = client.receive(buffer, sizeof(buffer));
00088             if (n <= 0) break;
00089             
00090             // Print received message to terminal
00091             buffer[n] = '\0';
00092             pc.printf("Received message from Client :'%s'\r\n",buffer);           
00093            
00094             // Compares the received string to predefined commands
00095             if(strncmp(buffer, cmd_ledon, sizeof(buffer)) == 0) {
00096                 flag = FLAG_LED_ON;
00097             } else if(strncmp(buffer, cmd_ledoff, sizeof(buffer)) == 0) {
00098                 flag = FLAG_LED_OFF;
00099             } else if(strncmp(buffer, cmd_ledblink, sizeof(buffer)) == 0) {
00100                 flag = FLAG_LED_BLINK;
00101             } else {
00102                 flag = FLAG_INVALID_CMD;    
00103             }
00104             
00105             // LED On/Off or Invalid command
00106             switch(flag)
00107             {
00108                 case FLAG_LED_ON:
00109                     myled = LED_ON; // LED ON in WIZwiki-W7500
00110                     pc.printf("WIZwiki: LED is turned on!\r\n");
00111                     break;
00112                     
00113                 case FLAG_LED_OFF:
00114                     myled = LED_OFF; // LED OFF in WIZwiki-W7500
00115                     pc.printf("WIZwiki: LED is turned off!\r\n");
00116                     break;
00117                 
00118                 case FLAG_LED_BLINK:                    
00119                     pc.printf("WIZwiki: LED starts blinking!\r\n");
00120                     break;
00121                     
00122                 case FLAG_INVALID_CMD:
00123                 default:                    
00124                     pc.printf("WIZwiki: Invalid command\r\n");
00125                     break;
00126             }
00127             
00128             // Reverse the message
00129             char temp;
00130             for(int f = 0, l = n-1; f<l; f++,l--){
00131                 temp = buffer[f];
00132                 buffer[f] = buffer[l];
00133                 buffer[l] = temp;
00134             }
00135             
00136             // Print reversed message to terminal
00137             pc.printf("Sending reversed message to Client: '%s'\r\n", buffer);
00138             pc.printf("\r\n");
00139             
00140             // Echo received message back to client
00141             client.send_all(buffer, n);
00142             if (n <= 0) break;
00143         }
00144         
00145         client.close();
00146     }    
00147 }