说明：  STM32f103 IO模拟总线访问三星的NANDFLASH K9F1208.目前网上的相关资料比较少，多数为直接通过FSMC访问。代码实现包括page，block，擦除与读写，在实际硬件平台上测试，绝对能用。鉴于本人走了不少弯路，故分享给大家。
(STM32f103 IO analog bus access to Samsung's NANDFLASH K9F1208., the current online related data is relatively small, mostly through direct access to FSMC. Code implementation, including page, block, erase and read and write, tested on the actual hardware platform, absolutely can use. Since I have taken many detours, I would like to share them with you.)