main.cpp

00001 #include "mbed.h"
00002 #include "EthernetNetIf.h"
00003 #include "TextLCD.h"
00004 #include "HTTPClient.h"
00005 
00006 TextLCD lcd(p24, p26, p27, p28, p29, p30); // rs, e, d4-d7
00007 
00008 EthernetNetIf eth; 
00009 HTTPClient http;
00010 
00011 int j_paser( const char *buf , char *word , char *out )
00012 {
00013     int i = 0;
00014     char *p;
00015     char _word[64] = "\"\0";
00016 
00017     strcat(_word , word );
00018     strcat(_word , "\"" );
00019 
00020     p = strstr( (char*)buf , _word ) + 2 + strlen(_word);
00021     
00022     while( (p[i] != ',')&&(p[i] != '\n') )
00023     {
00024         out[i] = p[i];
00025         i++;
00026     }
00027     out[i] = '\0';
00028     
00029     return(i);
00030 }
00031 
00032 int main(void) {
00033     
00034     char year[32];
00035     char month[32];
00036     char day[32];
00037     char hour[32];
00038     char usage[32];
00039     char capacity[32];
00040     
00041     EthernetErr ethErr = eth.setup();
00042     if(ethErr)
00043     {
00044         lcd.locate(0,0);
00045         lcd.printf("Ethernet err.");
00046         return(-1);
00047     }
00048     
00049     lcd.locate(0,0);
00050     lcd.printf("Getting info.");
00051     
00052     HTTPText txt;
00053     
00054     HTTPResult r = http.get("http://tepco-usage-api.appspot.com/latest.json", &txt);
00055     
00056     if(r==HTTP_OK)
00057     {
00058         j_paser(txt.gets() , "year" , year);
00059         j_paser(txt.gets() , "month" , month);
00060         j_paser(txt.gets() , "day" , day);
00061         j_paser(txt.gets() , "hour" , hour);
00062         j_paser(txt.gets() , "usage" , usage);
00063         j_paser(txt.gets() , "capacity" , capacity);
00064         
00065         lcd.locate(0,0);
00066         lcd.printf("%s/%s/%s %sh",year,month,day,hour);
00067         lcd.locate(0,1);
00068         lcd.printf("%s/%s %3.1f%%",usage,capacity,(((float)atoi(usage)/(float)atoi(capacity))*100.0));
00069     }
00070     else
00071     {
00072         lcd.locate(0,0);
00073         lcd.printf("Http get err.");
00074         return(-1);
00075     }
00076     
00077     while(1)
00078     {
00079         
00080     }
00081     
00082     return(0);
00083 }