File content as of revision 50:10483b3f0410:

#if !defined(MQTT_MBED_H)
#define MQTT_MBED_H

#include "mbed.h"

class Countdown
{
public:
    Countdown() {
        t = new Timer();
        if (t == NULL) printf ("Countdown newfail\n\r");		
    }
    
    Countdown(int ms) {
        t = new Timer();
        if (t == NULL) printf ("Countdown newfail\n\r");					
        countdown_ms(ms);   
    }
    
    ~Countdown() {
        delete t;
    }
    
    bool expired() {
        return t->read_ms() >= interval_end_ms;
    }
    
    void countdown_ms(unsigned long ms) {
        t->stop();
        interval_end_ms = ms;
        t->reset();
        t->start();
    }
    
    void countdown(int seconds) {
        countdown_ms((unsigned long)seconds * 1000L);
    }
    
    int left_ms() {
        return interval_end_ms - t->read_ms();
    }
    
private:
    Timer *t;
    unsigned long interval_end_ms; 
};

#endif