[ECOS] jffs2 problem

[Gary Thomas]

On 05/17/2011 12:15 PM, Eigil Krogh Sørensen wrote:
> Hi
>
> I'm writing code that uses jffs2 (for a Freescale i.MX25 board) and can't get it to work.
>
> In RedBoot I have created at fis image with name jffs2 w.:
> "fis create -l 0x1024"
>
>   "fis list" gives:
> Name              FLASH addr  Mem addr    Length      Entry point
> RedBoot           0x00000000  0x00000000  0x000C0000  0x00000000
> FIS directory     0x000C0000  0x000C0000  0x0003F000  0x00000000
> RedBoot config    0x000FF000  0x000FF000  0x00001000  0x00000000
> perfTsts          0x00100000  0x00100000  0x00040000  0x00100230
> jffs2             0x00140000  0x00000000  0x00040000  0xFFFFFFFF
>
>
> Then I have erased the FLASH w.:
> "fis erase -f 0x00140000 -l 0x00040000"
>
> After that in eCos "mount( "/dev/flash/fis/jffs2", "/", "jffs2" )" works OK, and on the tty it writes "Erase 0x00140000: .." when the "mount( "/dev/flash/fis/jffs2", "/", "jffs2" )" instruction is run.
>
> But I can't create any files in "/" after that. The instruction "open( "jffs2tst", O_WRONLY|O_CREAT )" returns -1 (which originates from "jffs2_reserve_space(.)" that returnes because dirty = 0 and c->nospc_dirty_size = 264765).
>
>
>
> What am I doing wrong ? Is there anything I can do to solve the problem ?

JFFS2 images need at least 2 empty erase blocks to function.
Try creating the image with a larger length.

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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