16x2 menu

Other Hardware Displays
1

Hello I am trying to make an lcd menu now I have my arduino and my lcd connected fantastically. I have added 4 buttons say 1 back, 2 left, 3 right and 4 as select. The buttons are wired to digital inputs and work they are grounded so they set the input to low.

Please can any of you help me

2

I only have a button, so I did a LEFT button for your reference.
I used pin 8 as left button input pin.
5V---10K---pin8----button----GND, so pin8 is normal high when button dose not be pushed.
when you push left button 1'st time, the LCD shows "LEFT", the 2'nd time, the LCD clear "LEFT".

I used the Hello World demo code to added a button function.

#include <LiquidCrystal.h>

/*
LiquidCrystal Library - Hello World

Demonstrates the use a 16x2 LCD display. The LiquidCrystal
library works with all LCD displays that are compatible with the
Hitachi HD44780 driver. There are many of them out there, and you
can usually tell them by the 16-pin interface.

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

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)

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.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

const int buttonPin = 8; // the number of the pushbutton pin
char buttonState = 0; // variable for reading the pushbutton status
char counter =0;
boolean buttonleftflag =true;
boolean buttonleftrelease = true;

void setup() {
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);

// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("hello, world!");
}

void loop() {
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 1);
// print the number of seconds since reset:
lcd.print(millis() / 1000);

// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);

if(buttonState == LOW)
{
if(buttonleftrelease == true)
{
if(buttonleftflag == true)
{
lcd.setCursor(8, 1);
lcd.print("LEFT");
buttonleftflag = false;
}
else
{
lcd.setCursor(8, 1);
lcd.print(" ");
buttonleftflag = true;
}
buttonleftrelease = false;
}
}
else
{
buttonleftrelease = true;
}
}