51单片机 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p3.7,按键p3.2 -51 single-chip 8 lamp boot cycle, according to P32 after the pause, a small horn ring, let go to continue the cycle of disruption of the typical application.* Hardware co