Time and Date LCD display

/* RTC time library Created by Bodmer: 2/3/15
 *   The circuit:
 * LCD RS pin to digital pin 12
 * LCD Enable pin to digital pin 11
 * LCD D4 pin to digital pin 5
 * LCD D5 pin to digital pin 4
 * LCD D6 pin to digital pin 3
 * LCD D7 pin to digital pin 2
 * LCD R/W pin to ground
 * LCD VSS pin to ground
 * LCD VCC pin to 5V
 * 10K resistor:
 * ends to +5V and ground
 * wiper to LCD VO pin (pin 3)
 * 
 * Baby Boilers for TLI -31300 Project 
 * This code is intended to be a function call, or possibly a library call 

*/

#include <Wire.h>
#include <LiquidCrystal.h>

#include <DS3231_Simple.h>

const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);


DateTime rtc;

DS3231_Simple Clock;

void setup() {
 lcd.begin(16, 2);
 lcd.clear();
  Clock.begin();

  // Get the time and date from the sketch compile time
  rtc.Hour   = conv2d(__TIME__);
  rtc.Minute = conv2d(__TIME__ + 3);
  rtc.Second = conv2d(__TIME__ + 6);

  rtc.Day    = conv2d(__DATE__ + 4);
  rtc.Month  = convm2d(__DATE__);
  rtc.Year   = conv2d(__DATE__ + 9); 

  // Set the clock
  Clock.write(rtc);
  
  rtc = Clock.read();
}

void loop() {

  // Wait here until seconds change
  uint8_t secs = rtc.Second;
  do
  {
    rtc = Clock.read();
  } while (secs == rtc.Second);
   lcd.setCursor(0, 0);
   lcd.print("Time -->");
  // Send the time and date tot he serial port
  // Add leading zeros to time to keep a nice format
  if (rtc.Hour < 10) lcd.print("0");
  
  lcd.print(rtc.Hour);
  lcd.print(":");
  if (rtc.Minute < 10) lcd.print("0");
  lcd.print(rtc.Minute);
  lcd.print(":");
  if (rtc.Second < 10) lcd.print("0");
  lcd.print(rtc.Second);

/*lcd.setCursor(col, row)
  lcd.setCursor(0, 0); // top left
lcd.setCursor(15, 0); // top right
lcd.setCursor(0, 1); // bottom left
lcd.setCursor(15, 1); // bottom right

*/

  lcd.setCursor(0,1 );
  lcd.print("Date -->");
  lcd.print(rtc.Day);
  lcd.print("/");
  lcd.print(rtc.Month);
  lcd.print("/");
  lcd.print(rtc.Year);
  lcd.print("  "); // Print 2 spaces to erase old digits (OK on I2C displays)


}

// Function to extract numbers from compile time string
uint8_t conv2d(const char* p) {
  uint8_t v = 0;
  if ('0' <= *p && *p <= '9')
    v = *p - '0';
  return 10 * v + *++p - '0';
}

// Function to extract month number from compile date string
uint8_t convm2d(const char* p) {
  uint8_t v = 0;
  if ('J' == *p && 'a' == *(p + 1)) v = 1;
  if ('F' == *p) v = 2;
  if ('M' == *p && 'a' == *(p + 1) && 'r' == *(p + 2)) v = 3;
  if ('A' == *p && 'p' == *(p + 1)) v = 4;
  if ('M' == *p && 'a' == *(p + 1) && 'y' == *(p + 2)) v = 5;
  if ('J' == *p && 'u' == *(p + 1) && 'n' == *(p + 2)) v = 6;
  if ('J' == *p && 'u' == *(p + 1) && 'l' == *(p + 2)) v = 7;
  if ('A' == *p && 'u' == *(p + 1)) v = 8;
  if ('S' == *p) v = 9;
  if ('O' == *p) v = 10;
  if ('N' == *p) v = 11;
  if ('D' == *p) v = 12;
  return v;
}