Problem with custom LCD Menu

Projects Programming
1

Hello Community,
i modifide a little Menu for my SainSmart Graphic Shield, but when i print out the "digital pin"-Site and want to the next site, i'll come to the Menu! Why?

Hope for help
Adrian

Code:

#include "LCD4884.h"
#include "SainSmart.h"
#include "SainSmart_chinese.h"
#include <stdio.h>
#include <stdlib.h>

//keypad debounce parameter
#define DEBOUNCE_MAX 15
#define DEBOUNCE_ON  10
#define DEBOUNCE_OFF 3 

#define NUM_KEYS 5

#define NUM_MENU_ITEM	4

// joystick number
#define LEFT_KEY 0
#define CENTER_KEY 1
#define DOWN_KEY 2
#define RIGHT_KEY 3
#define UP_KEY 4

// menu starting points

#define MENU_X	10		// 0-83
#define MENU_Y	1		// 0-5




int  adc_key_val[5] ={
  50, 200, 400, 600, 800 };

// debounce counters
byte button_count[NUM_KEYS];
// button status - pressed/released
byte button_status[NUM_KEYS];
// button on flags for user program 
byte button_flag[NUM_KEYS];

boolean checkBacklight;

// menu definition
char menu_items[NUM_MENU_ITEM][12]={
  "INPUT PINS", 
  "OUTPUT PINS",
  "BACKLIGHT",
  "ABOUT"	
};



void (*menu_funcs[NUM_MENU_ITEM])(void) = {
  input_pins,
  output_pins,
  backlight,
  about
};

char current_menu_item;

void loop()
{
  byte i;
  for(i=0; i<NUM_KEYS; i++){
    if(button_flag[i] !=0){

      button_flag[i]=0;  // reset button flag
      switch(i){

      case UP_KEY:
        // current item to normal display
        lcd.LCD_write_string(MENU_X, MENU_Y + current_menu_item, menu_items[current_menu_item], MENU_NORMAL );
        current_menu_item -=1;
        if(current_menu_item <0)  current_menu_item = NUM_MENU_ITEM -1;
        // next item to highlight display
        lcd.LCD_write_string(MENU_X, MENU_Y + current_menu_item, menu_items[current_menu_item], MENU_HIGHLIGHT );
        break;
      case DOWN_KEY:
        // current item to normal display
        lcd.LCD_write_string(MENU_X, MENU_Y + current_menu_item, menu_items[current_menu_item], MENU_NORMAL );
        current_menu_item +=1;
        if(current_menu_item >(NUM_MENU_ITEM-1))  current_menu_item = 0;
        // next item to highlight display
        lcd.LCD_write_string(MENU_X, MENU_Y + current_menu_item, menu_items[current_menu_item], MENU_HIGHLIGHT );
        break;
      case LEFT_KEY:
        init_MENU();
        current_menu_item = 0;
        break;   
      case CENTER_KEY:
        lcd.LCD_clear();
        (*menu_funcs[current_menu_item])();
        lcd.LCD_clear();
        init_MENU();
        current_menu_item = 0;           
        break;	
      }

    }
  }
}

void input_pins()
{
  char buf[10];
  byte key = 0xFF;
  byte i;
  
    lcd.LCD_write_string(3, 2, "All Pins", MENU_NORMAL);
  lcd.LCD_write_string(3, 3, "are INPUT", MENU_NORMAL);
  delay(3000);
  lcd.LCD_clear();
  
  //DIGITAL PINS
  
  while (key != CENTER_KEY) {
   
   lcd.LCD_write_string(3, 1, "dp8:", MENU_NORMAL); 
   lcd.LCD_write_string(35, 1, itoa(digitalRead(8), buf, 10), MENU_NORMAL);
   lcd.LCD_write_string(3, 2, "dp9:", MENU_NORMAL); 
   lcd.LCD_write_string(35, 2, itoa(digitalRead(9), buf, 10), MENU_NORMAL);
   lcd.LCD_write_string(3, 3, "dp10:", MENU_NORMAL); 
   lcd.LCD_write_string(35, 3, itoa(digitalRead(10), buf, 10), MENU_NORMAL);
   
   lcd.LCD_write_string(38, 5, "Weiter", MENU_HIGHLIGHT);
   
   for(i=0; i<NUM_KEYS; i++){
      if(button_flag[i] !=0){
        button_flag[i]=0;  // reset button flag
        if(i== CENTER_KEY) key=CENTER_KEY;
      }
      }
   
  }
  
  delay(1000);
  lcd.LCD_clear();
  
  //ANALOG PINS
  
  while (key != CENTER_KEY) {
      lcd.LCD_write_string( 3, 1, "A1:", MENU_NORMAL);
      lcd.LCD_write_string( 40, 1, itoa(analogRead(A1), buf, 10), MENU_NORMAL);
      lcd.LCD_write_string( 3, 2, "A2:", MENU_NORMAL);
      lcd.LCD_write_string( 40, 2, itoa(analogRead(A2), buf, 10), MENU_NORMAL);
      lcd.LCD_write_string( 3, 3, "A3:", MENU_NORMAL);
      lcd.LCD_write_string( 40, 3, itoa(analogRead(A3), buf, 10), MENU_NORMAL);
      
      lcd.LCD_write_string( 3, 4, "Stick: ", MENU_NORMAL);
      lcd.LCD_write_string( 40, 4, itoa(analogRead(A0), buf, 10), MENU_NORMAL);
      
      lcd.LCD_write_string(45, 5, "Menu", MENU_HIGHLIGHT );
      
      for(i=0; i<NUM_KEYS; i++){
      if(button_flag[i] !=0){
        button_flag[i]=0;  // reset button flag
        if(i== CENTER_KEY) key=CENTER_KEY;
      }
    }
  }
  
}

You can download the code from here, but you'll need some external libraries: https://dl.dropbox.com/u/42107981/LCD4884_sainsmart.ino