这个程序适用于ATMEGA128的开发板。本程序为蜂鸣器程序，蜂鸣器进行如下循环：响2秒，停5秒，响2秒，停5秒-This procedure applies to ATMEGA128 Development Board. This program is the program buzzer buzzer the following cycle: ring two seconds, stop for 5 seconds, the ring two seconds, stop for 5 seco