Arduino 类初始化执行

我正在尝试为UNO板编写一个简单的固件，该板能够在按下按钮时切换LCD(16x2(显示器的内容。我尝试使用类和标头编写它，以便我可以更轻松地向代码添加更多按钮。问题是我的类初始化方法在while(1)循环之外不起作用，如下所示。

这根本不起作用：

main.ino

#include "button.h"
#include <avr/io.h>
#include <util/delay.h>
#include <LiquidCrystal.h>
//Buttons PORTX register
#define buttonPortx PORTD
//Buttons DDRx register
#define buttonDdrx DDRD
//Buttons PINx register
#define buttonPinx PIND
//Buttons pins definition
#define B0 PD2
#define B1 PD3
#define B2 PD4
#define B3 PD5
//LCD pins definition
#define RS A5
#define EN A4
#define D4 A3
#define D5 A2
#define D6 A1
#define D7 A0
LiquidCrystal lcd(RS, EN, D4, D5, D6, D7);
Button button1 = Button();
int main()
{
  buttonDdrx = (0 << B0) | (0 << B1) | (0 << B2) | (0 << B3);
  buttonPortx = (1 << B0) | (1 << B1) | (1 << B2) | (1 << B3);
  //My initialization method:
  button1.Initialize(buttonPinx, B0);
  lcd.begin(16, 2);
  lcd.clear();
  lcd.setCursor(5,0);
  lcd.print("Hello!");
  while (1)
  {
    if (button1.IsReleased())
    {
      lcd.clear();
      lcd.setCursor(4,0);
      lcd.print("Pressed!");
      while (1);
    }
    _delay_ms(50);
  }
}

但是这个效果很好：

main.ino

#include "button.h"
#include <avr/io.h>
#include <util/delay.h>
#include <LiquidCrystal.h>
//Buttons PORTX register
#define buttonPortx PORTD
//Buttons DDRx register
#define buttonDdrx DDRD
//Buttons PINx register
#define buttonPinx PIND
//Buttons pins definition
#define B0 PD2
#define B1 PD3
#define B2 PD4
#define B3 PD5
//LCD pins definition
#define RS A5
#define EN A4
#define D4 A3
#define D5 A2
#define D6 A1
#define D7 A0
LiquidCrystal lcd(RS, EN, D4, D5, D6, D7);
Button button1 = Button();
int main()
{
  buttonDdrx = (0 << B0) | (0 << B1) | (0 << B2) | (0 << B3);
  buttonPortx = (1 << B0) | (1 << B1) | (1 << B2) | (1 << B3);
  lcd.begin(16, 2);
  lcd.clear();
  lcd.setCursor(5,0);
  lcd.print("Hello!");
  while (1)
  {
    //My initialization method:
    button1.Initialize(buttonPinx, B0);
    if (button1.IsReleased())
    {
      lcd.clear();
      lcd.setCursor(4,0);
      lcd.print("Pressed!");
      while (1);
    }
    _delay_ms(50);
  }
}

还有我的头文件/cpp 文件：

按钮.h

#ifndef Button_h
#define Button_h
class Button
{
  public:
    Button();
    void Initialize(int port, int pin);
    bool IsReleased();
  private:
    bool pressed = false;
    int _port;
    int _pin;
};
#endif

按钮.cpp

#include "button.h"
Button::Button()
{
}
void Button::Initialize(int port, int pin)
{
  _port = port;
  _pin = pin;
}
bool Button::IsReleased()
{
  if (!(_port & (1 << _pin)) && (pressed == false))
  {
    pressed = true;
  }
  if ((_port & (1 << _pin)) && (pressed == true))
  {
    pressed = false;
    return true;
  }
  return false;
}

我正在使用带有参数C++类构造函数来设置_port和_pin值，但是在查看此论坛帖子后，我创建了Initialize(int port, int pin)方法，但仍然无法解决问题。

任何帮助将不胜感激！