Author: Charles Manning Date: To: yaffs Subject: Re: [Yaffs] i've another question about yaffs2_scan_chunk?
On Thursday 29 March 2012 13:58:05 Ezio Zhang wrote: > when start up,yaffs scan every chunk of a block that the summary not
> when it read the chunk's oob,if it is an empty chunk,the tags it read if
> full of 0xff,so the flag chunk_used should not be 0 and the judgement of
> "if (!tag.chunk_used)" should never enter, am i right?
Erased flash starts off 0xff and can then be changed by setting 1 bits to 0
If the tags are full of 0xff then chunk_used should be 0.
> so in my understanding ,the function dev->param.read_chunk_tags_fn shoud do
> something rather than copy data from flash?
> and when writing data to flash,i cannot skip one or more chunks then write
> another one?
I don't understand quite what you mean here can you give a slightly more
> thansk very much.
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