CARA MEMPROGRAM LCD KARAKTER KEYPAD SHIELD 16X2 DENGAN ARDUINO

Pada posting kali ini kita akan membahas Tutorial Cara Memprogram Lcd Keypad Karakter 16X2 Dengan Arduino,di arduino untuk lcd karakter sudah tersedia librarynya.

Untuk mencoba tutorial ini,modul yang di butuhkan :

1.Arduino Uno

2.LCD Keypad Shield

DIAGRAM

ALOKASI PIN ARDUINO

CONTOH PROGRAM

/*******************************************************
Program  : LCD KARAKTER KEYPAD SHIELD 16X2
Chip     : Arduino Uno
Date     : 25/06/2015
Created  : Mark Bramwell
Modified : Lab-elektronika Team
email    : elektronikajakarta@gmail.com
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;
     }
 }

}

PENJELASAN PROGRAM

Panggil library lcd untuk arduino

#include <LiquidCrystal.h>

Inisialisasi pin arduino yg di gunakan

LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

Mendefinisikan nilai variabel

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

Fungsi baca tombol dengan adc

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;
}

Tampilkan karakter ke lcd

 lcd.print("TEKAN TOMBOL");

Set posisi kolom dan baris

 lcd.setCursor(0,0);

 lcd.setCursor(0,1);

Baca tombol ditekan

tombollcd = read_LCD_buttons();