Menguji Rangkaian & Source Code RTC DS1302 + Arduino Uno

// DS1302_Serial_Easy (C)2010 Henning Karlsen
// web: http://www.henningkarlsen.com/electronics
//
// Adopted for DS1302RTC library by Timur Maksimov 2014
//
// A quick demo of how to use my DS1302-library to
// quickly send time and date information over a serial link
//
// I assume you know how to connect the DS1302.
// DS1302:  CE pin    -> Arduino Digital 27
//          I/O pin   -> Arduino Digital 29
//          SCLK pin  -> Arduino Digital 31
//          VCC pin   -> Arduino Digital 33
//          GND pin   -> Arduino Digital 35

#include <Time.h>
#include <DS1302RTC.h>

// Set pins:  CE, IO,CLK
DS1302RTC RTC(27, 29, 31);

// Optional connection for RTC module
#define DS1302_GND_PIN 33
#define DS1302_VCC_PIN 35

void setup()
{

  // Setup Serial connection
  Serial.begin(9600);
  
  Serial.println("DS1302RTC Read Test");
  Serial.println("-------------------");
  
  // Activate RTC module
  digitalWrite(DS1302_GND_PIN, LOW);
  pinMode(DS1302_GND_PIN, OUTPUT);

  digitalWrite(DS1302_VCC_PIN, HIGH);
  pinMode(DS1302_VCC_PIN, OUTPUT);
  
  Serial.println("RTC module activated");
  Serial.println();
  delay(500);
  
  if (RTC.haltRTC()) {
    Serial.println("The DS1302 is stopped.  Please run the SetTime");
    Serial.println("example to initialize the time and begin running.");
    Serial.println();
  }
  if (!RTC.writeEN()) {
    Serial.println("The DS1302 is write protected. This normal.");
    Serial.println();
  }
  
  delay(5000);
}

void loop()
{
  tmElements_t tm;
  
  Serial.print("UNIX Time: ");
  Serial.print(RTC.get());

  if (! RTC.read(tm)) {
    Serial.print("  Time = ");
    print2digits(tm.Hour);
    Serial.write(':');
    print2digits(tm.Minute);
    Serial.write(':');
    print2digits(tm.Second);
    Serial.print(", Date (D/M/Y) = ");
    Serial.print(tm.Day);
    Serial.write('/');
    Serial.print(tm.Month);
    Serial.write('/');
    Serial.print(tmYearToCalendar(tm.Year));
    Serial.print(", DoW = ");
    Serial.print(tm.Wday);
    Serial.println();
  } else {
    Serial.println("DS1302 read error!  Please check the circuitry.");
    Serial.println();
    delay(9000);
  }
  
  // Wait one second before repeating :)
  delay (1000);
}

void print2digits(int number) {
  if (number >= 0 && number < 10)
    Serial.write('0');
  Serial.print(number);
}

Sekilas Tentang Modul RTC DS1302

Gambar Modul RTC DS1302

Gambar rangkain RTC DS1302 dan Arduino Uno

VCC pada pin 8
GND pada pin 9
RST pada pin 11
DAT pada pin 12
CLK pada pin 13

// Set pins:  CE, IO,CLK
DS1302RTC RTC(11, 12, 13);

// Optional connection for RTC module
#define DS1302_GND_PIN 9
#define DS1302_VCC_PIN 8

// --------------------------------------------------------
// Read the current time from the RTC and return it as a 
// time_t value. Returns a zero value if an bus error occurred
// (e.g. RTC not present).
time_t DS1302RTC::get()
{
    tmElements_t tm;
    
    if ( read(tm) ) return 0;
    return( makeTime(tm) );
}

// --------------------------------------------------------
// Read the current time from the RTC and return it as a 
// time_t value. Returns a zero value if an bus error occurred
// (e.g. RTC not present).
time_t DS1302RTC::get()
{
    tmElements_t tm;
    
    //if ( read(tm) ) return 0;
    if (! read(tm) ) return 0;
    return( makeTime(tm) );
}