Hi I am using yaffs2 in a board including SLC NANDFLASH and ARM micro-controller. I use no OS so I handle all of the codes by myself. Unfortunately, I couldn't find complete document to implement yaffs, but I've tried to understand the details using available documents and codes. My problem is that when I run the code yaffs_mount() return "-1". Where did I do wrong? " yaffs_start_up(); i=yaffs_mount("/nand"); " Is there any complete example for using yaffs with NANDFLASH without OS? Thanks for any help. Amin