Digital Clock with Arduino and RTC Module and P10 LEDmatrix

 



#include <Wire.h>

#include "RTClib.h"

#include <SPI.h>       

#include <DMD.h>    

#include <TimerOne.h>  

#include "Arial_black_16.h"

#include "Font_6x14.h" //-> This font only contains numbers from 0-9. Used only to display time.

#define DISPLAYS_ACROSS 1 //-> Number of P10 panels used, side to side.

#define DISPLAYS_DOWN 1

DMD dmd(DISPLAYS_ACROSS, DISPLAYS_DOWN);


RTC_DS1307 rtc; //-> RTC Declaration


int _day, _month, _year, _hour24, _hour12, _minute, _second, _dtw;

int hr24;

String st;

char nameoftheday[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

char month_name[12][12] = {"January","February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};

const long interval = 1000; //-> Retrieve time and date data every 1 second

unsigned long previousMillis = 0;

char hr_24 [3];

String str_hr_24;

char mn [3];

String str_mn;

void ScanDMD() { 

  dmd.scanDisplayBySPI();

}


void setup() {

  Serial.begin(115200);

  Serial.println("Arduino RTC DS1307");

  delay(1000);

  

  if (! rtc.begin()) {

    Serial.println("Couldn't find RTC");

    while (1);

  }


  if (! rtc.isrunning()) {

    Serial.println("RTC is NOT running!");

    // following line sets the RTC to the date & time this sketch was compiled (Set the time and date based on your computer time and date)

    // rtc.adjust(DateTime(F(__DATE__), F(__TIME__))); //-> Set the time and date based on your computer time and date. If that doesn't work, use this line of code outside of "if (! rtc.isrunning())"

    // This line sets the RTC with an explicit date & time, for example to set

    // January 21, 2014 at 3am you would call:

    // rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));

  }

  // following line sets the RTC to the date & time this sketch was compiled (Set the time and date based on your computer time and date)

  rtc.adjust(DateTime(F(__DATE__), F(__TIME__))); //-> Set the time and date based on your computer time and date. Use this line of code if it doesn't work in "if (! rtc.isrunning())"

  //rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));

  // If the time and date are successfully set, then deactivate the code line (make the code a comment), then re-upload the code.

  // if not done then the time and date will return to the beginning when it was set when arduino is reset or restarted.


  Timer1.initialize(1000);          

  Timer1.attachInterrupt(ScanDMD);   

  dmd.clearScreen(true);  

}


void loop() {

 

  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {

    previousMillis = currentMillis; //-> save the last time


    GetDateTime(); //-> Retrieve time and date data from DS1307

    

    dmd.selectFont(Font_6x14);


    str_hr_24=String(_hour24);

    str_hr_24.toCharArray(hr_24,3);


    if (_hour24<10) {

      dmd.drawString(0, 0, "0", 1, GRAPHICS_NORMAL);

      dmd.drawString(7, 0, hr_24, 1, GRAPHICS_NORMAL);

    }

    else {

      dmd.drawString(0, 0, hr_24, 2, GRAPHICS_NORMAL);

    }

    

    if (_second %2 == 0) {

      dmd.drawFilledBox(15,3,16,4, GRAPHICS_OR);

      dmd.drawFilledBox(15,11,16,12, GRAPHICS_OR);

    }

    else {

      dmd.drawFilledBox(15,3,16,4, GRAPHICS_NOR);

      dmd.drawFilledBox(15,11,16,12, GRAPHICS_NOR);

    }

   

    str_mn=String(_minute);

    str_mn.toCharArray(mn,3);


    if (_minute<10) {

      dmd.drawString(19, 0, "0", 1, GRAPHICS_NORMAL);

      dmd.drawString(26, 0, mn, 1, GRAPHICS_NORMAL);

    }

    else {

      dmd.drawString(19, 0, mn, 2, GRAPHICS_NORMAL);

    }

    


    if (_second==11) { //-> Display the date when seconds equal to 11

      scrolling_date();

    }

    

  }

  

}




void GetDateTime() {

  DateTime now = rtc.now();

  _day=now.day();

  _month=now.month();

  _year=now.year();

  _hour24=now.hour();

  _minute=now.minute();

  _second=now.second();

  _dtw=now.dayOfTheWeek();


  hr24=_hour24;

  if (hr24>12) {

    _hour12=hr24-12;

  }

  else if (hr24==0) {

    _hour12=12;

  }

  else {

    _hour12=hr24;

  }


  if (hr24<12) {

    st="AM";

  }

  else {

    st="PM"; 

  }  

}


void scrolling_date() {

  String Date = String(nameoftheday[_dtw]) + ", " + String(_day) + "-" + String(month_name[_month-1]) + "-" + String(_year);

  char dt[50];

  Date.toCharArray(dt,50);

  

  dmd.clearScreen(true); 

  dmd.selectFont(Arial_Black_16);

  dmd.drawMarquee(dt,strlen(dt),(32*DISPLAYS_ACROSS)-1,0);

  boolean ret=false;

  while(!ret){

    ret=dmd.stepMarquee(-1,0);

    delay(75); //-> //-> delay For scroll speed

  }

  dmd.clearScreen(true);

  return;

}

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