MQTTmbed.h

00001 #if !defined(MQTT_MBED_H)
00002 #define MQTT_MBED_H
00003 
00004 #include "mbed.h"
00005 
00006 class Countdown
00007 {
00008 public:
00009     Countdown() {
00010         t = new Timer();
00011         if (t == NULL) printf ("Countdown newfail\n\r");        
00012     }
00013     
00014     Countdown(int ms) {
00015         t = new Timer();
00016         if (t == NULL) printf ("Countdown newfail\n\r");                    
00017         countdown_ms(ms);   
00018     }
00019     
00020     ~Countdown() {
00021         delete t;
00022     }
00023     
00024     bool expired() {
00025         return t->read_ms() >= interval_end_ms;
00026     }
00027     
00028     void countdown_ms(unsigned long ms) {
00029         t->stop();
00030         interval_end_ms = ms;
00031         t->reset();
00032         t->start();
00033     }
00034     
00035     void countdown(int seconds) {
00036         countdown_ms((unsigned long)seconds * 1000L);
00037     }
00038     
00039     int left_ms() {
00040         return interval_end_ms - t->read_ms();
00041     }
00042     
00043 private:
00044     Timer *t;
00045     unsigned long interval_end_ms; 
00046 };
00047 
00048 #endif