通过P1.0端口以1HZ的频率输出信号，使用该信号点亮一个LED指示灯，

并将信号接入到INT1，统计中断的次数。

将中断的次数通过两个七段数码管采用十进制显示出来。当超过99次后，清零并 重新计数。-Through P1.0 port with 1 hz frequency output signal, using the signal light an LED light,

And access to the signals to the INT1, statistical interrupt the number of times.

The number of will break through the two seven segment digital tube using decimal display. After more than 99 times, reset and count again.