/* Program 3-2 Flash two numbers on LCD on EduBaseV2 board with Arduino 
 *
 * The LCD controller is connected parallel in 4-bit data mode.
 * The connections are:
 * Pin 12 - Register select
 * Pin 11 - Enable
 * Pins 5, 4, 3, 2 - data 7-4
 * Make sure the LCD interface selection jumper is set at "parallel".
 * 
 * This program uses LiquidCrystal library. For details of libraries:
 * https://www.arduino.cc/en/Reference/LiquidCrystal
 */

/* include the library code */
#include <LiquidCrystal.h>

/* initialize the library with the numbers of the interface pins 
 * LiquidCrystal(rs, enable, d4, d5, d6, d7) 
 */
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
  
void setup() {
    /* set up the LCD's number of columns and rows: 16x2 */
    lcd.begin(16, 2);
}

void loop() {
    /* display the numbers */
    lcd.print(3.1416);
    lcd.print(", ");
    lcd.print(2.71828);
    delay(1000);
    /* erase the numbers */
    lcd.clear();
    delay(1000);
}