说明：  一位计数器，按p3.2数码管加1，到9后回0,同时小喇叭响一下报警码管数据p0,数码管控制p2口,按键p3.2口 ，喇叭p3.3
(a counter, according to p3.2 plus a digital pipe to the back nine after 0, Also horn ring for what police code of data p0, digital control p2 mouth, keypad p3.2 mouth, the loudspeaker p3.3)