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System.cpp

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#include "Arduino.h"
#include "System.h"
char* System::uptime()
{
char buffer[65];
long days=0;
long hours=0;
long mins=0;
long secs=0;
secs = millis()/1000; //convect milliseconds to seconds
mins=secs/60; //convert seconds to minutes
hours=mins/60; //convert minutes to hours
days=hours/24; //convert hours to days
secs=secs-(mins*60); //subtract the coverted seconds to minutes in order to display 59 secs max
mins=mins-(hours*60); //subtract the coverted minutes to hours in order to display 59 minutes max
hours=hours-(days*24); //subtract the coverted hours to days in order to display 23 hours max
if (days > 0) {
ltoa(days,buffer,10);
strcpy(retval,buffer);
}
else {
strcpy(retval,"0");
}
strcat(retval,":");
ltoa(hours,buffer,10);
strcat(retval,buffer);
strcat(retval,":");
ltoa(mins,buffer,10);
strcat(retval,buffer);
strcat(retval,":");
ltoa(secs,buffer,10);
strcat(retval,buffer);
strcat(retval,'\0');
return retval;
}
int System::ramFree () {
extern int __heap_start, *__brkval;
int v;
int a = (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval);
return a;
}
int System::ramSize() {
int v;
int a = (int) &v;
return a;
}
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