/*Program  : LCD KARAKTER KEYPAD SHIELD 16X2
Chip     : Arduino Uno
Date     : 25/06/2015
Created  : Mark Bramwell
Modified : Lab-elektronika Team
email    : [email protected]
Sumber   : labelektronika.blogspot.com
********************************************************/
#include <LiquidCrystal.h>
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

int tombollcd  = 0;
int bacatombol = 0;
#define tombolright  0
#define tombolup     1
#define tomboldown   2
#define tombolleft   3
#define tombolselect 4
#define tombolnone   5

int read_LCD_buttons()
{
 bacatombol = analogRead(0);      
 if (bacatombol > 1000) return tombolnone;
 if (bacatombol < 50)   return tombolright;  
 if (bacatombol < 250)  return tombolup; 
 if (bacatombol < 450)  return tomboldown; 
 if (bacatombol < 650)  return tombolleft; 
 if (bacatombol < 850)  return tombolselect;  
 return tombolnone;
}

void setup()
{
 lcd.begin(16, 2);    
 lcd.setCursor(0,0);
 lcd.print("TEKAN TOMBOL");
}
 
void loop()
{
 lcd.setCursor(0,1);           
 tombollcd = read_LCD_buttons();  

 switch (tombollcd)               
 {
   case tombolright:
     {
     lcd.print("RIGHT ");
     break;
     }
   case tombolleft:
     {
     lcd.print("LEFT   ");
     break;
     }
   case tombolup:
     {
     lcd.print("UP    ");
     break;
     }
   case tomboldown:
     {
     lcd.print("DOWN  ");
     break;
     }
   case tombolselect:
     {
     lcd.print("SELECT");
     break;
     }
     case tombolnone:
     {
     lcd.print("NONE  ");
     break;
     }
 }

}