使用单片机、液晶显示器、两个按键（确定键、功能键）及其它外围元件，设计一个秒表，实现功能如下：

（1）开机上电后，液晶显示器第一行显示“Welcome Here！”，第二行显示“Please Enter Key”。

（2）按下“确定键”，液晶显示器先清除屏幕，然后再显示，第一行显示你的姓名拼音，第二行显示你的学号。

（3）按下“确定键”后，液晶显示器先清除屏幕，然后进入到秒表的界面，第一行显示“Miao Biao Test”，第二行显示“00.00”，计时到秒后面两位。

（4）第1次按下“功能键”，秒表开始计时，第2次按“功能键”，计时停止，第3次按“功能键”，计时清零。

-Microcontroller, LCD display, two buttons (OK keys, function keys), and other peripheral components, design a stopwatch, and functions are as follows:

(1) Power On, the first line of the LCD monitor display "Welcome Here!", The second line shows "Please Enter Key.

(2) Press the OK button, LCD display clear the screen first, and then show that the first line shows your name Pinyin, the second line to show your student number.

(3) Press the OK key, the LCD monitor first clears the screen, and then enter the interface to the stopwatch, the first line shows the Miao Biao Test, the second line of the display "00.00", timed to the second behind two.

(4) 1st press the function keys, the stopwatch starts timing, 2nd press the function key, the timing is stopped, 3rd press the function key, time cleared.