1.一个精度为0.1s的秒表系统。

2.有启动按钮、暂停按钮及清零按钮。

3每到一秒钟有声音提醒功能，可通过按钮打开及关闭该提醒音。

压缩包中包含proteus仿真图、hex文件和C语言源代码，代码中写有详尽的注释，一看就能懂-1 with a precision stopwatch system 0.1s.

2 have start button, pause button and clear button.

3 every second a voice reminder function, through the button to open and close the reminder tone.

Compressed package contains proteus simulation diagram, hex files and C language source code, code written in detailed notes, a look can understand