Thanks!
I commented define in the file include/configs/am335x_evm.h
#define CONFIG_ENV_IS_NOWHERE
After that I found saveenv command in uboot. But in this case saveenv
command cause error "Unable to use mmc 0:1 for saveenv". I decided that I
also should specify where I want to save environment variables. In source
code I found that define CONFIG_EMMC_BOOT is used for RAW mode. I added
define CONFIG_EMMC_BOOT in include/configs/am335x_evm.h and it seems that
saveenv works now. I can see that raw data in emmc is not empty now:
root@user:~# hexdump -C /dev/mmcblk1boot1
00000000 7a f0 38 b3 04 61 72 63 68 3d 61 72 6d 00 61 72
|z.8..arch=arm.ar|
00000010 67 73 5f 66 69 74 3d 73 65 74 65 6e 76 20 62 6f |gs_fit=setenv
bo|
00000020 6f 74 61 72 67 73 20 63 6f 6e 73 6f 6c 65 3d 24 |otargs
console=$|
00000030 7b 63 6f 6e 73 6f 6c 65 7d 20 00 61 72 67 73 5f |{console}
.args_|
00000040 6d 6d 63 3d 72 75 6e 20 66 69 6e 64 75 75 69 64 |mmc=run
finduuid|
00000050 3b 73 65 74 65 6e 76 20 62 6f 6f 74 61 72 67 73 |;setenv
bootargs|
00000060 20 63 6f 6e 73 6f 6c 65 3d 24 7b 63 6f 6e 73 6f |
console=${conso|
00000070 6c 65 7d 20 24 7b 63 61 70 65 5f 64 69 73 61 62 |le}
${cape_disab|
00000080 6c 65 7d 20 24 7b 63 61 70 65 5f 65 6e 61 62 6c |le}
${cape_enabl|
00000090 65 7d 20 24 7b 63 61 70 65 5f 75 62 6f 6f 74 7d |e}
${cape_uboot}|
среда, 22 февраля 2017 г., 18:55:42 UTC+3 пользователь RobertCNelson
написал:
>
> On Wed, Feb 22, 2017 at 8:37 AM, <[email protected] <javascript:>>
> wrote:
> > Hello Robert,
> >
> > Can you please describe more precisely how to enable uboot saveenv
> command
> > for BeagleBone Black?
> >
> > I could not understand how patch line 177 relates to saveenv command.
> >
>
> well now it's line 155
>
> Regards,
>
>
> --
> Robert Nelson
> https://rcn-ee.com/
>
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