说明：   本实验设计一个简单的乒乓球游戏机。它可由两个人进行游戏，游戏规则如下： 1．过早击球，对方获胜。 2．每次击球，若球飞出界外，对方获胜。 实验用6个状态代表乒乓球的运动轨迹，2个输出信号指示获胜方，2个输入信号代表双方的球拍，1个复位信号用于复位和准备发球。输入信号击球低有效。因为一般的开关在大约20ms内信号不稳定，存在所谓“开关抖动“，会产生多个脉冲影响电路的正常工作。所以含开关输入的设计需要作防抖处理，在本实验中可以用2Hz时钟采样击球信号实现防抖。
(The experimental design of a simple table tennis game. It can be two people play games, game rules are as follows: 1. Too early to hit the ball, the other wins. 2. Every shot, the ball flying out of bounds if the other side wins. Experiment with six states on behalf of the trajectories of table tennis, two output signals indicative winning side, two sides of the ball on behalf of the input signal Film, a reset signal for the reset and ready to serve. Hitting a low effective input signal. It is because the letter within the switch in about 20ms No. of instability, there is the so-called "switch jitter" will generate multiple pulses affect the normal operation of the circuit. Therefore, with switch input Design requirements for image stabilization processing, in this experiment can be hit 2Hz sampling clock signal to achieve anti-shake.)