1 files changed, 106 insertions, 0 deletions
diff --git a/Time/Examples/TimeRTCLog/TimeRTCLog.pde b/Time/Examples/TimeRTCLog/TimeRTCLog.pde
new file mode 100644
index 0000000..76ed17d
--- /dev/null
+++ b/Time/Examples/TimeRTCLog/TimeRTCLog.pde
@@ -0,0 +1,106 @@
+/*
+ * TimeRTCLogger.pde
+ * example code illustrating adding and subtracting Time.
+ * 
+ * this sketch logs pin state change events
+ * the time of the event and time since the previous event is calculated and sent to the serial port. 
+ */
+
+#include <Time.h>  
+#include <Wire.h>  
+#include <DS1307RTC.h>  // a basic DS1307 library that returns time as a time_t
+
+const int nbrInputPins  = 6;             // monitor 6 digital pins 
+const int inputPins[nbrInputPins] = {2,3,4,5,6,7};  // pins to monitor
+boolean state[nbrInputPins] ;            // the state of the monitored pins
+time_t  prevEventTime[nbrInputPins] ;    // the time of the previous event
+
+void setup()  {
+  Serial.begin(9600);
+  setSyncProvider(RTC.get);   // the function to sync the time from the RTC  
+  for(int i=0; i < nbrInputPins; i++){
+     pinMode( inputPins[i], INPUT);
+     // digitalWrite( inputPins[i], HIGH);  // uncomment these lines if 
+     // state[i] = HIGH;                    // pull-up resistors are wanted
+  }
+}
+
+void loop()
+{
+   for(int i=0; i < nbrInputPins; i++)
+   {
+     boolean val = digitalRead(inputPins[i]); 
+     if(val != state[i])
+     {
+        time_t duration = 0; // the time since the previous event
+        state[i] = val;
+        time_t timeNow = now();
+        if(prevEventTime[i] > 0)  
+           // if this was not the first state change, calculate the time from the previous change
+           duration = duration = timeNow - prevEventTime[i];         
+        logEvent(inputPins[i], val, timeNow, duration );  // log the event
+        prevEventTime[i] = timeNow;                       // store the time for this event  
+     }
+   }
+}
+
+void logEvent( int pin, boolean state, time_t timeNow, time_t duration)
+{
+   Serial.print("Pin ");
+   Serial.print(pin);
+   if( state == HIGH)
+      Serial.print(" went High at ");
+   else   
+     Serial.print(" went  Low at ");
+   showTime(timeNow); 
+   if(duration > 0){
+     // only display duration if greater than 0  
+     Serial.print(", Duration was ");
+     showDuration(duration);
+   }
+   Serial.println();
+}
+
+
+void showTime(time_t t){
+  // display the given time 
+  Serial.print(hour(t));
+  printDigits(minute(t));
+  printDigits(second(t));
+  Serial.print(" ");
+  Serial.print(day(t));
+  Serial.print(" ");
+  Serial.print(month(t));
+  Serial.print(" ");
+  Serial.print(year(t)); 
+}
+
+void printDigits(int digits){
+  // utility function for digital clock display: prints preceding colon and leading 0
+  Serial.print(":");
+  if(digits < 10)
+    Serial.print('0');
+  Serial.print(digits);
+}
+
+void showDuration(time_t duration){
+// prints the duration in days, hours, minutes and seconds
+  if(duration >= SECS_PER_DAY){
+     Serial.print(duration / SECS_PER_DAY);
+     Serial.print(" day(s) "); 
+     duration = duration % SECS_PER_DAY;     
+  }
+  if(duration >= SECS_PER_HOUR){
+     Serial.print(duration / SECS_PER_HOUR);
+     Serial.print(" hour(s) "); 
+     duration = duration % SECS_PER_HOUR;     
+  }
+  if(duration >= SECS_PER_MIN){
+     Serial.print(duration / SECS_PER_MIN);
+     Serial.print(" minute(s) "); 
+     duration = duration % SECS_PER_MIN;     
+  }
+  Serial.print(duration);
+  Serial.print(" second(s) ");   
+}
+