eda设计一个具有暂停 清零功能的秒表 eda代码

在EDA（Embedded Development Arena）环境中，设计一个带暂停和清零功能的秒表通常需要使用Python的Tkinter库创建图形用户界面（GUI），结合计时器功能。以下是一个简单的示例代码，使用了`time`模块来实现秒表的功能：

import tkinter as tk
from tkinter import messagebox
import time

class StopWatch(tk.Frame):
    def __init__(self, master=None):
        super().__init__(master)
        self.master = master
        self.pack()
        self.seconds = 0
        self.start_time = None
        self.stop_button = tk.Button(self, text="开始", command=self.start_stop)
        self.stop_button.pack()
        self.pause_button = tk.Button(self, text="暂停", state=tk.DISABLED, command=self.pause_unpause)
        self.pause_button.pack()
        self.reset_button = tk.Button(self, text="清零", command=self.reset)
        self.reset_button.pack()

    def start_stop(self):
        if not self.start_time:
            self.start_time = time.time()
            self.stop_button.config(state=tk.DISABLED)
            self.pause_button.config(state=tk.NORMAL)
        else:
            if self.is_paused():
                return
            current_time = time.time()
            self.seconds += int(current_time - self.start_time)
            self.update_label()
            self.start_time = current_time

    def pause_unpause(self):
        if self.start_time and not self.is_paused():
            self.pause()
        elif self.start_time and self.is_paused():
            self.unpause()

    def pause(self):
        self.seconds += time.time() - self.start_time
        self.start_time = None
        self.pause_button.config(text="继续")
        self.stop_button.config(state=tk.NORMAL)

    def unpause(self):
        self.start_time = time.time()
        self.pause_button.config(text="暂停")
        self.stop_button.config(state=tk.DISABLED)

    def reset(self):
        self.seconds = 0
        self.start_time = None
        self.update_label()

    def update_label(self):
        label_text = "秒数: {}s".format(self.seconds)
        self.master.title(label_text)

    def is_paused(self):
        return self.start_time is None

if __name__ == "__main__":
    root = tk.Tk()
    stop_watch = StopWatch(master=root)
    stop_watch.mainloop()

在这个例子中，秒表有三个按钮：“开始”用于启动计时，如果已经暂停则会继续；“暂停”用于暂停计时并显示当前累计时间；“清零”用于重置秒数。