RMA initiated. Hope they reveal what went wrong with my board!
Found one clue, my fears about importbootenv are probably unfounded:
http://lists.busybox.net/pipermail/buildroot/2013-September/078135.html
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On Thu, 12 Sep 2013 18:41:43 -0500, Ryan Barnett wrote:
> Some boards in u-boot support the ability to modify the environment
> by placing a plain text file as uEnv.txt in the root of the partition
> of an SD card. For the extact placement of where the uEnv.txt should
> be, consult your u-boot environment. Your board supports this
> overwriting of environment variables if "loadbootenv" and
> "importbootenv" are defined in the board's environment.
loadbootenv and importbootenv are just U-Boot scripts that are specific
to certain board configurations.
All what loadbootenv does it load a file into memory, and all what
importbootenv does is call 'env import -t <addr> <size>' to load the
environment into U-Boot.
---
So I have:
loadbootenv=load mmc ${mmcdev} ${loadaddr} ${bootenv}
and
importbootenv=echo Importing environment from mmc ...; env import -t
$loadaddr $filesize
and
loadaddr=0x80200000
bootenv=uEnv.txt
Filesize is not defined, but it doesn't seem to be defined in any
environments I can find:
http://wiki.beyondlogic.org/index.php/BeagleBoneBlack_Default_uBoot_Environment_Variables
Several pages say tftp automatically sets $filesize:
http://linino.org/doku.php?id=wiki:flash-from-uboot
but I haven't found any mention of loadbootenv setting it. It must...
So my fear of importing another environment from a hosed eMMC seems
unfounded. All of this apparently only loads one environment:
---
bootcmd=gpio set 53; i2c mw 0x24 1 0x3e; run findfdt; mmc dev 0; if mmc
rescan ; then echo micro SD card found;setenv mmcdev 0;else echo No micro
SD card found, setting mmcdev to 1;setenv mmcdev 1;fi;setenv bootpart
${mmcdev}:2;mmc dev ${mmcdev}; if mmc rescan; then gpio set 54; echo SD/MMC
found on device ${mmcdev};if run loadbootenv; then echo Loaded environment
from ${bootenv};run importbootenv;fi;if test -n $uenvcmd; then echo Running
uenvcmd ...;run uenvcmd;fi;gpio set 55; if run loaduimage; then gpio set
56; run loadfdt;run mmcboot;fi;fi;
---
micro SD card found
mmc0 is current device
SD/MMC found on device 0
reading uEnv.txt
1313 bytes read in 3 ms (426.8 KiB/s)
Loaded environment from uEnv.txt
Importing environment from mmc ...
Running uenvcmd ...
---
Off to pack up the board for RMA...
Loren
On Tuesday, January 7, 2014 6:30:23 AM UTC-8, Gerald wrote:
>
> Send the board in under an RMA and get it looked at.
>
> Gerald
>
>
--
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