main.cpp

00001 #include "mbed.h"
00002 #include "EthernetInterface.h"
00003 #include "Adafruit_SSD1306.h"
00004 
00005 class I2CPreInit : public I2C
00006 {
00007 public:
00008     I2CPreInit(PinName sda, PinName scl) : I2C(sda, scl)
00009     {
00010         frequency(100000);
00011         start();
00012     };
00013 };
00014 
00015 I2CPreInit gI2C(PA_10,PA_9);
00016 Adafruit_SSD1306_I2c gOled(gI2C,NC,0x78,64,128);
00017 
00018 //internal led
00019 DigitalOut red_led(LED1,1);
00020 DigitalOut blue_led(LED3,1);
00021 
00022 int main()
00023 {
00024     int phy_link;
00025     printf("Wait a second...\r\n");
00026     uint8_t mac_addr[6] = {0x00, 0x08, 0xDC, 0x00, 0x01, 0x09}; 
00027     
00028     EthernetInterface eth;
00029     eth.init(mac_addr); //Use DHCP
00030     
00031     eth.connect();
00032     
00033     //phy link
00034      do{
00035         phy_link = eth.ethernet_link();
00036         printf("...");
00037         wait(2);
00038      }while(!phy_link);
00039      printf("IP Address is %s\r\n\r\n", eth.getIPAddress());
00040 
00041     char buffer[1024];
00042     int ret;
00043 
00044     //BUS "GET /ws/rest/busarrivalservice?serviceKey=??&routeId=??&stationId=?? \n\n"
00045     char http_cmd[] = "GET /ws/rest/busarrivalservice?serviceKey=1234567890&routeId=234000878&stationId=206000082 \n\n"; // 8100
00046 
00047     while(1)
00048     {
00049         //TCP socket connect 
00050         TCPSocketConnection sock;
00051         sock.connect("openapi.gbis.go.kr", 80);
00052     
00053         sock.send_all(http_cmd, sizeof(http_cmd)-1);
00054     
00055         while (true)
00056         {
00057             ret = sock.receive(buffer, sizeof(buffer)-1);
00058             
00059             if (ret <= 0)
00060                 printf("fail\r\n");
00061                 //break;
00062             else{
00063                 buffer[ret] = '\0';
00064                 printf("Received %d chars from server: %s\r\n", ret, buffer);
00065                 break;
00066             }
00067         }
00068     printf("\r\n\r\n");
00069     
00070 
00071     // parsing data 
00072     char *date;
00073     char *bus_1st;
00074     char *bus_2nd;
00075     
00076     char current_date[11] = {0};
00077     char arrive_bus1[2] = {0};
00078     char arrive_bus2[2] = {0};
00079 
00080     date = strstr(buffer, "<queryTime>");
00081     for(int i=0;i<10;i++){
00082         current_date[i] = date[i+11];
00083     }
00084         
00085     bus_1st = strstr(buffer, "<predictTime1>");
00086     for(int i=0; i<2;i++){
00087         arrive_bus1[i] = bus_1st[i+14];
00088         if(arrive_bus1[i] == '<'){
00089            arrive_bus1[i] = 0;
00090            break;
00091         }
00092     }
00093     
00094     bus_2nd = strstr(buffer, "<predictTime2>");
00095     for(int i=0; i<2;i++){
00096         arrive_bus2[i] = bus_2nd[i+14];
00097         if(arrive_bus2[i] == '<'){
00098            arrive_bus2[i] = 0;
00099            break;
00100         }
00101     }
00102     
00103     printf("current date :  %s\r\n",  current_date);
00104     printf("arrival bus1 :  %s\r\n",  arrive_bus1);
00105     printf("arrival bus2 :  %s\r\n",  arrive_bus2);
00106       
00107       
00108     // OLED Display
00109     gOled.begin();
00110     gOled.clearDisplay();
00111     
00112     gOled.printf("%s\n\n", current_date);
00113     gOled.printf("No.8100\n\n");
00114     gOled.printf("You have %s mins\n\n", arrive_bus1);
00115     gOled.printf("Next Bus %s mins\n", arrive_bus2);
00116     gOled.display();
00117     gOled.setTextCursor(0,0);
00118     
00119     wait(12);
00120    };
00121 
00122 }