基于atmegal128的驱动程序，包括了串口打印，串口输入，I2C测试程序，写E2PROM，SPI测试程序，写FLASH-Based atmegal128 drivers, including a serial printer, serial input, I2C test program, written E2PROM, SPI test program, write FLASH

SPI flash芯片 W25Q128芯片的驱动程序，16M空间。(the driver for spi flash chip W25Q128, the total space is 16M)

SPI FLASH MX25L25635参考驱动代码,很实用(SPI FLASH MX25L25635 Reference driver code, very practical)