/*
   e-Gizmo LCD Shield & keypad shield v1

   This is a simple sample code for the
   sample demonstration of LCD (2x16),(4x20)
   Display and keypad matrix connections.
   Also with on board buttons and a +5v buzzer
   included. This LCD Shield is compatible in
   gizDuino (plus) ATmega644p and gizDuino (x)
   ATmega1281p.

   The circuit:
                     *gizDuino 328   == 644 and X
   * LCD RS pin to digital     pin 12 == pin 26
   * LCD Enable pin to digital pin 11 == pin 27
   * LCD D4 pin to digital     pin 5  == pin 28
   * LCD D5 pin to digital     pin 4  == pin 29
   * LCD D6 pin to digital     pin 3  == pin 30
   * LCD D7 pin to digital     pin 2  == pin 31
   * 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)

   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.

   http://www.arduino.cc/en/Tutorial/LiquidCrystal
  
   by e-Gizmo Mechatronix Central
   http://www.e-gizmo.com
   November 12, 2015 modified

*/


#include <LiquidCrystal.h>
//Selection of LiquidCrystal pins
//LiquidCrystal lcd(12, 11, 5, 4, 3, 2); //gizDuino 328 or gizduino V
LiquidCrystal lcd(26, 27, 28, 29, 30, 31); //default pin assign (644 and X)

//Buttons pins assignment
#define button_S2 18 
#define button_S3 17
#define button_S4 16
#define button_S5 15
#define button_S6 14
//set the buttons on HIGH state
int buttonS2_state = 1;
int buttonS3_state = 1;
int buttonS4_state = 1;
int buttonS5_state = 1;
int buttonS6_state = 1;

boolean clr =false;
void setup(){
  //Selection of LCD begin characters
  //lcd.begin(16,2); // set lcd  in 16x2 characters
  lcd.begin(20,4); // set lcd in 20x4 characters
  lcd.setCursor(0,0); // set the cursor in (0,0) /(COL,ROW) to begin
  lcd.print("LCD Shield"); // print a message to the LCD.

  //Initialize button pins as an INPUT.
  //INPUT_PULLUP or HIGH
  pinMode(button_S2, INPUT_PULLUP);
  pinMode(button_S3, INPUT_PULLUP);
  pinMode(button_S4, INPUT_PULLUP);
  pinMode(button_S5, INPUT_PULLUP);
  pinMode(button_S6, INPUT_PULLUP);

}
  
void loop(){
  //read the state of the pushbutton value:
  int buttonS2_state = digitalRead(button_S2);
  int buttonS3_state = digitalRead(button_S3);
  int buttonS4_state = digitalRead(button_S4);
  int buttonS5_state = digitalRead(button_S5);
  int buttonS6_state = digitalRead(button_S6);

   // set the cursor to column 0, line 1
  // (note: line 1 is the second row, since counting begins with 0):
  lcd.setCursor(0,1);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is LOW:
  if(buttonS2_state == 0){
    lcd.print("button_S2"); //print a message to the LCD
    //delay(1000); //wait for a second
  }
  if(buttonS3_state == 0){
    lcd.print("button_S3");
    //delay(1000);
  }
  
  if(buttonS4_state == 0){
    lcd.print("button_S4");
    //delay(1000);
  }
  
  if(buttonS5_state == 0){
    lcd.print("button_S5");
    //delay(1000);
  }
  
  if(buttonS6_state == 0){
    lcd.print("button_S6");
    //delay(1000);
  }
  
 clr = true;

 if(clr == true){
  lcd.print("         "); //clear the message to the LCD
 }
}