[U-Boot-Users] Re: environmental variable corruption on dataflash
wd at denx.de
Wed Mar 23 22:08:21 CET 2005
In message <loom.20050322T145047-28 at post.gmane.org> you wrote:
> > Run a "md" command over your environment area and you will probably
> > see what happened.
> Yep, you are right. It is because of control chars:
> c0020000: e96454c3 746f6f62 616c6564 00333d79 .Td.bootdelay=3.
> c0020010: 64756162 65746172 3531313d 00303032 baudrate=115200.
> c0020020: 746f6f62 656c6966 6d49753d 00656761 bootfile=uImage.
> c0020030: 6470756b 3d657461 70746674 31303220 kupdate=tftp 201
> c0020040: 30303030 49752030 6567616d 1b445b1b 00000 uImage.[D.
> c0020050: 5b1b445b 445b1b44 1b445b1b 5b1b445b [D.[D.[D.[D.[D.[
> c0020060: 445b1b44 1b445b1b 5b1b445b 445b1b44 D.[D.[D.[D.[D.[D
> c0020070: 1b445b1b 5b1b445b 445b1b44 1b445b1b .[D.[D.[D.[D.[D.
> c0020080: 5b1b445b 445b1b44 72445b1b 6f645f6e [D.[D.[D.[Drn_do
> c0020090: 6f6c6e77 5b1b6461 435b1b43 1b435b1b wnload.[C.[C.[C.
> c00200a0: 5b1b435b 6c660043 32687361 3d6e726b [C.[C.flash2krn=
> c00200b0: 622e7063 30306320 30303832 30322030 cp.b c0028000 20
> c00200c0: 30303031 31203030 30303030 656e0030 100000 100000.ne
> Is there a way to get rid of the bad entries without bulk erasing
> a flash sector?
In this case the control characters are in the value of the variable
only - it should be trival to delete or redefine it.
If you have control character in the name of a variable, and cannot
figure out how to enter thise at teh command line, than indeed
erasing the whole environment is the fastest method to clean up.
[If you get used to either providing a useful default environment
and/or using a "shell script" to set the environment values then
restoring a sane state is just a matter of a few seconds.]
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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