/* 
 Tests de la carte ramps 
 * Note: On most Arduino boards, there is already an LED on the board
 connected to pin 13, so you don't need any extra components for this example.
 
 
 DISPLAY ON Arduino Mega2560 VIA RAMPS
 * LCD RS pin to digital pin 16
 * LCD Enable pin to digital pin 17
 * LCD D4 pin to digital pin 23
 * LCD D5 pin to digital pin 25
 * LCD D6 pin to digital pin 27
 * LCD D7 pin to digital pin 29
 * LCD R/W pin to ground
 
 
 
 */
// include the library code for LCD display:
#include <LiquidCrystal.h>
 
// constants won't change. They're used here to 
// set pin numbers:
const int led1 = 13;        // the number of the standard led
const int button = 41;      // the number of the pushbutton pin
const int speakerPin = 37;  // buzzer connected

//LCD RS pin to digital pin 16
const int lcdrs=16; 
//LCD Enable pin to digital pin 17
const int lcde=17;
//LCD D4 pin to digital pin 23
const int lcdd4=23; 
//LCD D5 pin to digital pin 25
const int lcdd5=25; 
//LCD D6 pin to digital pin 27
const int lcdd6=27; 
//LCD D7 pin to digital pin 29
const int lcdd7=29; 
  
// say ON is alighted and OFF is not
// led are lighted when pin is HIGH
const int ON=HIGH;
const int OFF=LOW;
const int FALSE=LOW;
const int TRUE=HIGH;
//variable to keep state of display done
int done=FALSE;
// initialize the library with the numbers of the interface pins
// create object: lcd (available as global object)
LiquidCrystal lcd(16,17,23,25,27,29);
  
void setup() {
  pinMode(button, INPUT);     // button is input
  digitalWrite(button,HIGH);  // need pull up resistor: HIGH/TRUE when not activated,  LOW/FALSE when activated
  
    // set up the LCD's number of columns and rows:
  lcd.begin(20, 4);
  // shutdown LED
  digitalWrite(led1, OFF); 
  // clear LCD display
  lcd.clear();
  // wait 2 sec
  delay(2000);
}

void loop() {
  // write once to avoid flickering of display
  if (!done) {
   lcd.clear();
   digitalWrite(led1, OFF);
   displayLcd(0,0,"hello");
   displayLcd(1,1,"salut");
   done=true;
  } 
  if (!digitalRead(button)) {
    done=false;
    lcd.clear();
    delay(5);
    digitalWrite(led1, ON);
    displayLcd(0,0,"Bouton !");
    while (!digitalRead(button)) {}; 
  } 
}

void displayLcd(int c, int l, String t) {
 lcd.setCursor(c,l);
 lcd.print(t); 
}