说明：  开机8个灯循环， 按p32后暂停，小喇叭响，松开继续循环，中断的典型应用 硬件连接：p1口8路指示灯，喇叭p3.3,按键p3.2
(Boot 8 lights cycle, according to p32 after the pause, small speaker sound, release the continuing cycle, interrupted typical application hardware connection: p1 port 8-channel light, horn p3.3, buttons p3.2)