thank you!

On Thursday, 2 November 2017 08:10:22 UTC-4, Denys Yurchenko wrote:
>
> It is *wrong* way edit an u-boot source files.
>
> The write way is change *CONFIG_ENV_IS_NOWHERE=y* to 
> *CONFIG_ENV_IS_NOWHERE=n* and add *CONFIG_SYS_EXTRA_OPTIONS="EMMC_BOOT"*  
> to u-boot/configs/am335x_boneblack_defconfig (or to 
> u-boot/configs/am335x_boneblack_vboot_defconfig) file.
>
> Best regards.
>
> On Monday, February 27, 2017 at 2:39:22 PM UTC+2, vl.a...@gmail.com wrote:
>>
>> 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,  <vl.a...@gmail.com> 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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