基于mega16的FAT文件系统操作，从SD卡读取数据，然后通过串口打印出来，实现基本的文件操作。-Mega16 based on the FAT file system operations, data from the SD card reader, and then print them out through the serial port, the realization of the basic file operations.

Platform: AVR mega16学习板 Project : 实验三十：ADC实验 Clock F : 3.6864MHz Software: ICCAVR7.14C -Clock F : 3.6864MHz Software: ICCAVR7.14C

avr mega16单片机四乘以四的键盘程序，零到十五，就是0到f-avr mega16 MCU