/*
  LiquidCrystal Library - Hello World

  Demonstrates the use a 20x2 LCD display.

  This sketch prints "Hello World!" to the LCD
  and shows the time.

  Library originally added 18 Apr 2008
  by David A. Mellis
  library modified 5 Jul 2009
  by Limor Fried (http://www.ladyada.net)
  example added 9 Jul 2009
  by Tom Igoe
  modified 22 Nov 2010
  by Tom Igoe

  This example code is in the public domain.

*/

// Include the library code:
#include <LiquidCrystal_mx300N.h>

// Initialize the library with the numbers of the interface pins
//  rs, enable, d0, d1, d2, d3, d4, d5, d6, d7
LiquidCrystal_mx300N lcd(12, 13, 4, 5, 6, 7, 8, 9, 10, 11);

uint8_t rows = 2;
uint8_t cols = 20;
char cln = ' ';
unsigned long startTime;
unsigned long partTime;

void setup() {
  // Set up the LCD's number of columns and rows:
  lcd.begin(cols, rows);

  // Print a message to the LCD.
  lcd.print("hello, world!");
  delay(2000);

  startTime = ((((long)12 * 60) + 32) * 60 + 00); // initialise time
  // but would need to get real time from somewhere to make display useful

  lcd.clear();
  lcd.setCursor(0, 1);
  lcd.print("The time is");
}

void loop() {
  /*
  lcd.clear();
  for(int i=0; i<8; i++) {
    lcd.print(char(i));
    lcd.print(' ');
  }
  delay(5000);
  lcd.clear();
  lcd.setBigfont();
  for(int i=0; i<10; i++) {
    lcd.print(char('0'+char(i)));
    lcd.print(' ');
  }
  delay(10000);
  */
  // Toggle hms separator (colon)
  //cln = char(' ') + char(5) - cln;
  cln = char(' ') + char(':') - cln;

  partTime = startTime + millis() / 1000; // wraps back to start after 50 days or so!
  // (time keeping accuracy dependant upon accuracy of Arduino timer)

  // Print each digit, starting at least significant
  //  and shift partTime one digit
  lcd.setBigfont();
  lcd.setCursor(19, 0);
  lcd.print(partTime % 10);  // seconds
  partTime = partTime / 10;
  lcd.setCursor(18, 0);
  lcd.print(partTime % 6);   // tens of seconds
  partTime = partTime / 6;

  lcd.setCursor(17, 0);
  lcd.print(cln);

  lcd.setCursor(16, 0);
  lcd.print(partTime % 10);  // minutes
  partTime = partTime / 10;
  lcd.setCursor(15, 0);
  lcd.print(partTime % 6);   // tens of minutes
  partTime = partTime / 6;

  lcd.setCursor(14, 0);
  lcd.print(cln);

  lcd.setCursor(13, 0);
  partTime = partTime % 24;
  lcd.print(partTime % 10);  // hours
  lcd.setCursor(12, 0);
  partTime = partTime / 10;
  lcd.print(partTime % 6);   // tens of hours
  partTime = partTime / 6;

  delay(492); // loop every half second or so
  // (delay doesn't affect time keeping, just colon flash rate)

/*
lcd.autoscroll();
lcd.setBigfont();
for (int i=0; i<1000; i++ ) {
  lcd.print(i % 10);
  delay(500);
}
*/
/*
lcd.clear();
lcd.clearBigfont();
lcd.setCursor(0,1);
lcd.print("Today : ");
lcd.setCursor(9,0);
lcd.setBigfont();
lcd.print(10.0-random(200)/10);
lcd.clearBigfont();
lcd.print(char(223));
lcd.print('C');
delay(1000);
*/
}