mbed joy stick and http

main.cpp

#include "mbed.h"
#include "EthernetInterface.h"
#include "HTTPClient.h"
#include "C12832.h"
#include <stdio.h>

InterruptIn up(p15);
InterruptIn down(p12);
InterruptIn left(p13);
InterruptIn right(p16);

//display out object
C12832 lcd(p5, p7, p6, p8, p11);

//joy stick
BusIn joy(p15,p12,p13,p16);
//DigitalIn fire(p14);
BusOut leds(LED1,LED2,LED3,LED4);

//flag for process
int inProc = -1;
int selecteJoy = -1;

//global variable
char key[512] = "0x7Y4bSH1H";
char url[100] = "http://sumoapi-c9-icoxfog417.c9.io/remocon";
char machine[10] = "mbed1";
int  color[4] = {0,0,0,0};

void invoke(){
    //handle joy stick event;
    leds = joy;
    switch(joy){
        case 1 : selecteJoy = 0; break;
        case 2 : selecteJoy = 1; break;
        case 4 : selecteJoy = 2; break;
        case 8 : selecteJoy = 3; break;
    }
    inProc = 1;
}

int main(void) {
    
    //initialize lcd
    lcd.cls();

    char query[1024] = "";
    HTTPText response(key, 512);
        
    //internet access
    EthernetInterface eth;
    HTTPClient http;
    
    eth.init(); //Use DHCP
    eth.connect();
  
    //game start
    lcd.printf("game start!! %s \n", eth.getIPAddress());
   
    //event handlerz
    up.rise(&invoke);
    down.rise(&invoke);
    left.rise(&invoke);
    right.rise(&invoke);

    while(true){
        if(inProc < 0){
            wait(0.25);
            continue;
        }

        //make post data
        color[selecteJoy] += 1;
        
        //build query
        if(key[0] == 0){
            sprintf(query, "%s?machine=%s&red=%i&blue=%i&green=%i&yellow=%i",url,machine,color[0],color[1],color[2],color[3]);        
        }else{
            sprintf(query, "%s?machine=%s&key=%s&red=%i&blue=%i&green=%i&yellow=%i",url,machine,key,color[0],color[1],color[2],color[3]);        
        }
        printf("%s\n",query);
        
        //send data to cloud
        char dummy[128];
        int ret = http.get(query, dummy , 128);
        if (!ret)
        {
            lcd.locate(0,15);
            lcd.printf("updated! objectId is %s" , dummy);            
        }
        else
        {
            lcd.printf("Error - ret = %d - HTTP return code = %d\n", ret, http.getHTTPResponseCode());
        }    
        
        //flag off
        inProc = -1;
    }

    eth.disconnect();  

}