Project #40: Liquid Crystal Display Games
Arduino Sketch:
/* ===============================================================
Project: LIQUID CRYSTAL DISPLAY TEST
Author: J. B. Wylzan
Website: http://www.ihackrobot.blogspot.com
Abstract: How to test the buttons on an LCD Panel
================================================================== */
//Sample using LiquidCrystal library
#include <LiquidCrystal.h>
// select the pins used on the LCD panel
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
int lcd_key = 0;
int adc_key_in = 0;
#define btnRIGHT 1
#define btnUP 2
#define btnDOWN 3
#define btnLEFT 4
#define btnSELECT 5
#define btnNONE 0
// read the buttons
int read_LCD_buttons()
{
adc_key_in = analogRead(0); // read the value from the sensor
if (adc_key_in > 1000) return btnNONE;
if (adc_key_in < 50) return btnRIGHT;
if (adc_key_in < 195) return btnUP;
if (adc_key_in < 380) return btnDOWN;
if (adc_key_in < 555) return btnLEFT;
if (adc_key_in < 790) return btnSELECT;
return btnNONE; }
void setup()
{
lcd.begin(16, 2);
lcd.setCursor(0,0);
lcd.print("I.M. a piece of Code"); // print a simple message
}
void loop()
{
lcd.setCursor(12,1);
lcd.print(millis()/1000); // display seconds elapsed since power-up
lcd.setCursor(0,1); // move to the begining of the second line
lcd_key = read_LCD_buttons(); // read the buttons
switch (lcd_key)
{
case btnRIGHT:
{
lcd.print("RIGHT ");
break;
}
case btnLEFT:
{
lcd.print(adc_key_in);
lcd.print(" LEFT");
break;
}
case btnUP:
{
lcd.print("UP ");
break;
}
case btnDOWN:
{
lcd.print("DOWN ");
break;
}
case btnSELECT:
{
lcd.print("SELECT");
break;
}
case btnNONE:
{
lcd.print("TEST ");
break;
}
}
}
#include <LiquidCrystal.h>
// select the pins used on the LCD panel
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
int lcd_key = 0;
int adc_key_in = 0;
#define btnRIGHT 1
#define btnUP 2
#define btnDOWN 3
#define btnLEFT 4
#define btnSELECT 5
#define btnNONE 0
// read the buttons
int read_LCD_buttons()
{
adc_key_in = analogRead(0); // read the value from the sensor
if (adc_key_in > 1000) return btnNONE;
if (adc_key_in < 50) return btnRIGHT;
if (adc_key_in < 195) return btnUP;
if (adc_key_in < 380) return btnDOWN;
if (adc_key_in < 555) return btnLEFT;
if (adc_key_in < 790) return btnSELECT;
return btnNONE; }
void setup()
{
lcd.begin(16, 2);
lcd.setCursor(0,0);
lcd.print("I.M. a piece of Code"); // print a simple message
}
void loop()
{
lcd.setCursor(12,1);
lcd.print(millis()/1000); // display seconds elapsed since power-up
lcd.setCursor(0,1); // move to the begining of the second line
lcd_key = read_LCD_buttons(); // read the buttons
switch (lcd_key)
{
case btnRIGHT:
{
lcd.print("RIGHT ");
break;
}
case btnLEFT:
{
lcd.print(adc_key_in);
lcd.print(" LEFT");
break;
}
case btnUP:
{
lcd.print("UP ");
break;
}
case btnDOWN:
{
lcd.print("DOWN ");
break;
}
case btnSELECT:
{
lcd.print("SELECT");
break;
}
case btnNONE:
{
lcd.print("TEST ");
break;
}
}
}
Disclaimer: We
shall not be liable for any loss or damage of whatever nature - direct,
indirect, consequential, or otherwise - which may arise as a result of
your use of any information on this website. However,
if you are interested in using any of the projects for personal or
educational purposes, please inform the author by email.
Public Domain Notice: Copyright (c) 2000. All rights reserved. This article is part of a book entitled iHackRobot. Copies are welcome to be shared or distributed publicly as long proper citations are observed. Please cite as follows: Biotronics: The Silver Species, Joey Lawsin, 1988, USA.
The Homotronics® and WiSe® logos are registered trademarks.
Copyright Biotronics© Inc. iHackRobot®. All Rights Reserved.
Patent Pending. 2000 © ®
==================================================================
Public Domain Notice: Copyright (c) 2000. All rights reserved. This article is part of a book entitled iHackRobot. Copies are welcome to be shared or distributed publicly as long proper citations are observed. Please cite as follows: Biotronics: The Silver Species, Joey Lawsin, 1988, USA.
==================================================================
Patent Pending. 2000 © ®
A L.A.W.S.I.N. Educational Production
