ATM 和 Arduino 矩阵键盘的 Tkinter GUI

如何解决ATM 和 Arduino 矩阵键盘的 Tkinter GUI

我正在尝试为 ATM 机项目制作 GUI。我想在连接到 Arduino 的 4x4 矩阵键盘上按下按钮时切换框架。我写了一些代码来读取 Arduino 的串行输出。 Arduino代码：

#include <Keypad.h>

const byte ROWS = 4; 
const byte COLS = 4; 

char hexaKeys[ROWS][COLS] = {
  {'1','2','3','A'},{'4','5','6','B'},{'7','8','9','C'},{'*','0','#','D'}
};

byte rowPins[ROWS] = {9,8,7,6}; 
byte colPins[COLS] = {5,4,3,2}; 

Keypad customKeypad = Keypad(makeKeymap(hexaKeys),rowPins,colPins,ROWS,COLS); 

void setup(){
  Serial.begin(9600);
}
  
void loop(){
  char customKey = customKeypad.getKey();
  
  if (customKey){
    Serial.print(customKey);
  }
}

我使用了一个线程 x 以便它可以运行 while True 循环，但是当我运行我的 GUI 并想要加载 PageTwo 时，框架卡在 PageOne 上，直到我按下键盘上的某些东西。我认为问题在于在线程完成后加载 PageTwo。 Python代码：

import tkinter as tk
import time
import serial
import threading


class SampleApp(tk.Tk):
    def __init__(self):
        tk.Tk.__init__(self)
        self.title('ABN-MANbro')
        self._frame = None
        self.switch_frame(StartPage)
        self.geometry('1920x1080')

    def switch_frame(self,frame_class):
        """Destroys current frame and replaces it with a new one."""
        new_frame = frame_class(self)
        if self._frame is not None:
            self._frame.destroy()
        self._frame = new_frame
        self._frame.pack(fill="both",expand=1)

    def checkKeypad(self):
        ser = serial.Serial("COM3",9600,timeout=1)
        while True:
            keypad = ser.read()
            keypad = keypad.decode()
            if keypad:
                print(keypad)
                return


# start page
class StartPage(tk.Frame):
    def __init__(self,master):
        tk.Frame.__init__(self,master)

        self.bg_image = tk.PhotoImage(file='images/beginscherm.png')
        self.bg_label = tk.Label(self,image=self.bg_image)
        self.bg_label.place(x=0,y=0)

        button1 = tk.Button(self,text="Go to Page One",command=lambda: master.switch_frame(PageOne))
        button1.pack()

# pincode-check
class PageOne(tk.Frame):
    def __init__(self,master)

        self.bg_image = tk.PhotoImage(file='images/pincode-check-scherm.png')
        self.bg_label = tk.Label(self,y=0)

        tk.Button(self,text="Page 2",command=lambda: master.switch_frame(PageTwo)).pack()


# option page
class PageTwo(tk.Frame):
    def __init__(self,master)

        self.bg_image = tk.PhotoImage(file='images/Keuzemenu-scherm.png')
        self.bg_label = tk.Label(self,y=0)

        button = tk.Button(self,text="Go to the start page",command=lambda: master.switch_frame(StartPage))

        self.wd = tk.PhotoImage(file='images/withdrawknop.png')
        withdrawButton = tk.Button(self,image=self.wd,borderwidth=0,command=lambda: master.switch_frame(PageThree))

        self.bal = tk.PhotoImage(file='images/balanceknop.png')
        balButton = tk.Button(self,image=self.bal,command=lambda: master.switch_frame(PageFour),borderwidth=0)

        self.fast = tk.PhotoImage(file='images/fast70knop.png')
        fastButton = tk.Button(self,image=self.fast,command=None,borderwidth=0)

        self.abort = tk.PhotoImage(file='images/abort knop.png')
        abortButton = tk.Button(self,image=self.abort,command=lambda: master.switch_frame(PageEight),borderwidth=0)

        button.pack()
        withdrawButton.place(x=1400,y=500)
        balButton.place(x=1400,y=640)
        fastButton.place(x=1400,y=780)
        abortButton.place(x=80,y=780)

        self.x = threading.Thread(target=master.checkKeypad())
        self.x.start()