说明：  这五个源代码是我自己编写的关于ATmega128单片机的程序。它们的功能分别有外部中断，12864显示，ad采样 及控制外部数字芯片等。希望能帮助大家，注释已经很清楚了。用的编程软件是 CVAVR。
(This five source code is what I have written about the ATmega128 MCU program. Their functions were external interrupts, 12864, ad Sampling and control external digital chips. Hope to help everyone, comments have been very clear. The programming software is CVAVR.)