上传的五个文件时mega16的仿真程序，使用codevisionAVR编写编译，用AVRstudio烧录，五个程序分别是SD卡的读写、AD转换，液晶显示、矩阵键盘控制数码管显示、数码管动态显示，C文件中都有详细的注释-Upload five files mega16 the simulation, the use CodeVisionAVR write compiler, with AVRstudio burn, five programs are SD card reader, AD conv

mega16板上实现定时中断功能，用C语言写的-mega16 realized on the timer interrupt function, written in C language