在LCD屏幕上显示秒表计时，并利用按键控制秒表的开始与暂停及清零。同时LED灯呈跑马灯闪烁-Displayed on the LCD screen stopwatch timer, and stopwatch using buttons control the start and pause and clear. LED lights were also flashing marquees

基于ARM9的倒计时秒表，用QT绘制界面，倒计时为零LED闪烁，有加减计时，暂停，启动，复位，单片机复位等功能-ARM9-based countdown stopwatch with QT drawing interface, the countdown to zero LED flashes, there is plus or minus timing, pause, start, reset, the microcontroller reset function