LCD KeyPad Shield

//Sample using LiquidCrystal library  
#include <LiquidCrystal.h>  
/*******************************************************  
 * This program will test the LCD panel and the buttons  
 * Mark Bramwell, July 2010  
 ********************************************************/

// select the pins used on the LCD panel  
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

// define some values used by the panel and buttons  
int lcd_key    = 0;  
int adc_key_in = 0;  
#define btnRIGHT  0  
#define btnUP     1  
#define btnDOWN   2  
#define btnLEFT   3  
#define btnSELECT 4  
#define btnNONE   5  

// read the buttons  
int read_LCD_buttons()  
{  
  adc_key_in = analogRead(0);   // read the value from the sensor   
  // my buttons when read are centered at these valies: 0, 144, 329, 504, 741  
  // we add approx 50 to those values and check to see if we are close  
  if (adc_key_in > 1000) return btnNONE; // We make this the 1st option for speed reasons since it will be the most likely result  
  // For V1.1 us this threshold  
  if (adc_key_in < 50)  return btnRIGHT;   
  if (adc_key_in < 250) return btnUP;   
  if (adc_key_in < 450) return btnDOWN;   
  if (adc_key_in < 650) return btnLEFT;   
  if (adc_key_in < 850) return btnSELECT;   
  // For V1.0 comment the other threshold and use the one below:  
  /*  
   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; // when all others fail, return this...  
}

void setup()  
{  
  lcd.begin(16, 2);       // start the library  
  lcd.setCursor(0,0);  
  lcd.print("Push the buttons"); // print a simple message  
}

void loop()  
{  
  lcd.setCursor(9,1);      // move cursor to second line "1" and 9 spaces over  
  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)        // depending on which button was pushed, we perform an action  
  {  
  case btnRIGHT:  
    {  
      lcd.print("RIGHT ");  
      break;  
    }  
  case btnLEFT:  
    {  
      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("NONE ");  
      break;  
    }  
  }  
}