On Fri, Oct 30, 2009 at 01:20:58PM +0800, HeLei wrote:
Hi, all
Hi, please wrap your lines at 75 or so characters -- and definitely don't paste code as all one line.
I'm a little confused on NAND read operation. According to NAND character, NAND flash is read page by page, which mean's once you read, at least you should read data with page size (such as 512Bytes)
Yes, unless you're reading from the out-of-band area.
But the nand_read_byte() is implemented as following: static u_char nand_read_byte(struct mtd_info *mtd) { struct nand_chip *this = mtd->priv; return readb(this->IO_ADDR_R); } it seems only one byte is read out.
It's reading one byte out of a buffer that was previously filled with some operation. It is used for reading status bytes and OOB bad block markers.
-Scott