DM642flash驱动编写,flash用的是S29AL032D70TFI000，程序中包括了读写函数，命令配置函数等-The preparation of DM642flash drive, flash is used S29AL032D70TFI000, procedures include reading and writing function, the command function, such as configuration

Nand flash 是嵌入式系统最常用的外部存储设备，这里介绍Nand flash驱动移植的过程及代码。-Nand flash is the most common external storage devices in embedded systems presented here Nand flash drive transplant process and code.