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#define BIT(x)        (1 << (x))
#define CHECKBIT(x,b)   (x&(b))
#define SETBIT(x,b)     x|=(b)
#define CLEARBIT(x,b)   x&=~(b)
#define TOGGLEBIT(x,b)  x^=(b)
#define count_element_array(x)  sizeof(x)/sizeof(x[0])


char debug_str[100];

typedef enum {
TIMER_EXE       = 0,
TIMER_DISABLED  = 1,
TIMER_RUN       = 2,
}TE_TIMER;

TE_TIMER programm_count_down_uint32 ( unsigned long *timer , unsigned long shift )
{
    if (*timer > 0 )
    {
      if (*timer > shift )
      {
        *timer -= shift;
        return TIMER_RUN;
      }
       else
      {
         *timer = 0;
         return TIMER_EXE;
      }
    }
  return TIMER_DISABLED;
}



bool KeyExe()
{
  static bool key_pressed;
  static uint8_t debounce_timer;
  
  if (key_pressed != !digitalRead(KEY)) {
    key_pressed = !key_pressed;
    debounce_timer = DEBOUNCE_TIME;
  }
  else if (debounce_timer && !--debounce_timer && key_pressed)
    return true;
  return false;
}

void loop()
{
 static unsigned long  task_time; 
 static unsigned long  key_time_start_press; 
 TE_TIMER  status; 

 static unsigned long  hw_old_system_timer = 0; 
        unsigned long  hw_current_system_timer = 0; 

 unsigned long  delta_task_timer; 
 
 hw_current_system_timer  = millis();
 delta_task_timer         = hw_current_system_timer - hw_old_system_timer;
 hw_old_system_timer      = hw_current_system_timer;

   if (KeyExe())
   {
	   key_counter++;
       key_time_start_press = 100; // ms
   }   
 
 status = programm_count_down_uint32 ( &key_time_start_press, delta_task_timer );
 switch ( status )
 {
    case TIMER_EXE:

    switch ( key_counter )
	{
	  case 0: break;	
	  case 1:  func1 (); break;	
	  case 2:  func2 (); break;	
	  case 3:  func3 (); break;	
	  case 4:  func4 (); break;	
	}
     sprintf  ( debug_str,"exe func: %d " ,key_counter ); 
	 key_counter = 0;
     Serial.println  ( debug_str ); 
    break;
    
    case TIMER_RUN:
     break;   
 }
 }