arduino examples

buzz/datetime.cpp

@@ -0,0 +1,25 @@
+#include "Arduino.h"
+#include "datetime.h"
+
+unsigned long DateTime::get(){
+  return _set_time + _elapsed_ms_after_set_time/1000;
+}
+
+void DateTime::set(unsigned long sec_since_epoch){
+  _set_time = sec_since_epoch;
+  _elapsed_ms_after_set_time = 0;
+}
+
+void DateTime::update(){
+  _current_ts = millis();
+  if (_current_ts < _last_ts) {
+    _set_time = _set_time + _elapsed_ms_after_set_time/1000;
+    _elapsed_ms_after_set_time = _current_ts + (MAX_UL - _last_ts);
+
+  } else {
+    _elapsed_ms_after_set_time += _current_ts;
+    
+  }  
+
+  _last_ts = _current_ts;
+}