Arduino DIY Clock

/*
 *    1.0
 *  : 1.4
 * :  
*/

#include <LowPower.h>
#include <Adafruit_GFX_rus.h>
#include <Adafruit_PCD8544_rus.h>
Adafruit_PCD8544 nokia = Adafruit_PCD8544(4, 3, 6, 7, 8); //CLK, DIN, DC, CE, RST

/*
 * : 
 *
 *   -->   
 *(1)RST    -->   8 pin
 *(2)CE     -->   7 pin
 *(3)DC     -->   6 pin
 *(4)DIN    -->   3 pin
 *(5)CLK    -->   4 pin
 *(6)VCC    -->   10 pin     !!!     !!!
 *(7)LIGHT  -->   -----     (     . 
 *                                .      .)
 *(8)GND    -->   GND
 *
 *  2 .
 *
*/

/*
 *    :
 *    IC:
 *    -->   
 * SDA      -->     A4
 * SCL      -->     A5
 * ====   ====
 * VCC      -->     3.3V
 * GND      -->     GND
*/

extern uint8_t logo[];

#include <iarduino_RTC.h>                            //   iarduino_RTC      .
iarduino_RTC time(RTC_DS1307);                       //   time    RTC     DS3231,    I2C

//=================   ===================
volatile int sec = 15;
volatile int minute = 8;
volatile int hour = 15;
volatile int date = 22;
volatile int Month = 6;
volatile int Year = 18;
volatile int weekDay = 5;
//==================================================


int day;
int month;
volatile boolean sleep = false;

#define powerBtn 2
#define dispPower 10

void setup() {
  delay(3000);              // !      5. 
                            //       ,  5   
  pinMode(dispPower, OUTPUT);
  digitalWrite(dispPower, HIGH);
  pinMode(powerBtn, INPUT_PULLUP);
  
  delay(300);                                                            //      
  time.begin();                                                          //    .
  time.settime(sec,minute,hour,date,Month,Year,weekDay);                 //    : 0 , 51 , 21 , 27, , 2015 , .
  
  nokia.begin();
  nokia.clearDisplay(); 
  nokia.setContrast(55);
  nokia.drawBitmap(0, 0, logo, 84, 48, BLACK);       //  Pe
  nokia.display();
  delay(1500);
  nokia.clearDisplay();
  nokia.drawLine(0, 20, 84, 20, BLACK);
  nokia.display();
}

//==========     !!!  =========
void wake_up() {
  digitalWrite(dispPower, HIGH);
  sleep = false;
  nokia.begin();
  nokia.clearDisplay(); 
  nokia.setContrast(55);
  nokia.display();
  detachInterrupt(0);
  nokia.drawBitmap(0, 0, logo, 84, 48, BLACK);       //  Pe
  nokia.display();
}
//===========================================================

void loop() {
  //==========          ==========
  if (sleep == false && digitalRead(powerBtn) == 0) {
    nokia.clearDisplay();
    nokia.drawBitmap(0, 0, logo, 84, 48, BLACK);       //  Pe
    nokia.display();
    delay(1000);
    digitalWrite(dispPower, LOW);
    sleep = true;
    delay(1000);
    attachInterrupt(0, wake_up, LOW);
    if (sleep == true) {LowPower.powerDown(SLEEP_FOREVER, ADC_OFF, BOD_OFF);}
  }
  //=========================================================================

  LowPower.powerDown(SLEEP_250MS, ADC_OFF, BOD_OFF);       //      250 

  //==========    ==========
  nokia.clearDisplay();
  nokia.drawLine(4, 25, 80, 25, BLACK);                 //  
  time.gettime();                                       //   
  nokia.setTextSize(2);                                 //   2 
  nokia.setCursor(5,5);                                 //  (5     5  y)
  nokia.print(time.Hours);                              // 
  nokia.setTextSize(3);                                 //   3 
  nokia.setCursor(25,2);                                // 
  nokia.print(":");
  nokia.setTextSize(2);
  nokia.setCursor(40,5);
  nokia.print(time.minutes);                            // 
  nokia.setTextSize(1);
  nokia.setCursor(68,5);
  nokia.print(time.seconds);                            // 
  //=====================================

  //================     ===================
  nokia.setCursor(13,30);
  time.gettime();
  //================  )))  =================
  day = time.weekday;
  switch (day) {
    case 0: 
      nokia.print(",");
      break;
    case 1: 
      nokia.print(",");
      break;
    case 2:
      nokia.print(",");
      break;
    case 3:
      nokia.print(",");
      break;
    case 4:
      nokia.print(",");
      break;
    case 5:
      nokia.print(",");
      break;
    case 6:
      nokia.print(",");
      break;
  }
  //====================================================
  nokia.setCursor(40,30);
  nokia.print(time.gettime("d.m"));
  nokia.setCursor(10,40);
  month = time.month;
  switch (month) {
    case 1: 
      nokia.print(", ");
      break;
    case 2: 
      nokia.print(", ");
      break;
    case 3:
      nokia.print(", ");
      break;
    case 4:
      nokia.print(", ");
      break;
    case 5:
      nokia.print(", ");
      break;
    case 6:
      nokia.print(", ");
      break;
    case 7:
      nokia.print(", ");
      break;
    case 8:
      nokia.print(", ");
      break;
    case 9:
      nokia.print(", ");
      break;
    case 10:
      nokia.print(", ");
      break;
    case 11:
      nokia.print(", ");
      break;
    case 12:
      nokia.print(", ");
      break;
  }

  nokia.print(time.gettime("Y"));
  //===================================================
  
  nokia.display();
}