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