LCD Increment and Decrement For Display

Development Boards Arduino
1

Dear all.

I am trying to call Display menu. If up key is pressed Displayed has to be incremented and stay in particular window if Decremented, go to previous Display function and show previous Display function.

circuit diagram:

http://www.freetronics.com/pages/16x2-l … wxIfs7pegJ

I found Counter is not incremented and there is flicker in LCD Display

#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
static int button_counter=0;
#define btnRIGHT  0		// Okay
#define btnUP     1		// inc
#define btnDOWN   2		// dec
#define btnLEFT   3		// Select
#define btnSELECT 4		// Menu
#define btnNONE   5
#define beeper A1      // Alarm buzzer
#define shortBeep 100
#define longBeep  500

void setup()
{
Serial.begin(9600);
}
void loop()
{
lcd_call();
}

 void lcd_call()
{

 int button = read_LCD_buttons();  



if(button==btnUP)
{
 button_counter=button_counter+1; 
 Serial.print("button_counter");
 Serial.println(button_counter);
}else if(button==btnDOWN)
{
  button_counter=button_counter-1; 
   Serial.println(button_counter);
}

if (button_counter>5)
{
  button_counter=1;
}else

while(button_counter<5)
{
   int button = read_LCD_buttons();  
  if(button != prev_button && button !=  btnNONE)
{
  prev_button = button; 
//timedBeep(shortBeep,2); 
}

if ((((button ==btnUP )||(button_counter==1))||((button ==btnDOWN )))&&(prev_button==btnUP))
{
digitalClockDisplay();//timedBeep(200,1); 

}else if((((button ==btnUP )||(button_counter==2))||((button ==btnDOWN )))&&(prev_button==btnUP))
{
 Display_angle();//timedBeep(200,1); 
}else if((((button ==btnUP )||(button_counter==3))||((button ==btnDOWN )))&&(prev_button==btnUP))
{
Display_coordinate();//timedBeep(200,1); 
}else if((((button ==btnUP )||(button_counter==4))||((button ==btnDOWN )))&&(prev_button==btnUP))
{
  button_loop();//timedBeep(500,4); 
}else if((((button ==btnUP )||(button_counter==5))||((button ==btnDOWN )))&&(prev_button==btnUP))
{
   Display_Wind();//timedBeep(200,1); 
}
  
}
}


void Display_Wind()
{
....Display Wind perameter........
}
void button_loop()
{
.....Button loop selection.........
}
void Display_coordinate()
{
.....Display coordinate.........
}
void  Display_angle()
{
......Display angle........
}
void digitalClockDisplay()
{
.......Display Date and time.........
}