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Altera_Forum
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20 years ago

[u-boot] hwo to setup ENV in compile time

First of all, u-boot can run on my custom board. Then 1. setenv &#39;bootm 00100000&#39; 2. saveenv [error comming] <div class='quotetop'>QUOTE </div> --- Quote Start --- Saving E...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

Hi ,

> *** Warning - bad CRC, using default environment

This indicates that the environment was not saved to NV memory.

> I notice that my flash is AM29LV128,while using AM29065D.C, and their CFI

> commands is not the same. So I just modified AM29065D.c to meet AM29LV128.

> Like here, erasing successed but writing failed.

You need to modify the flash driver, make sure you set the appropriate number

of sectors, etc.

> Please help me to figure out how to setup ENV in compile time, to modify which

> c-file to determine bootcmd?

Put it in your configuration header file. For example, for the PK1C20 board, it would

go in the include/configs/PK1C20.h file. The generic way is with the

CONFIG_EXTRA_ENV_SETTINGS macro:

# define CONFIG_EXTRA_ENV_SETTINGS

"myvar=somthing\0"

"hostname=MyHost\0"

""

There are many "standard" environment variables that have their own macros:

# define CONFIG_BOOTCOMMAND "run net_nfs"# define CONFIG_BOOTDELAY 5# define CONFIG_ETHADDR 08:00:3e:26:0a:5b# define CONFIG_NETMASK 255.255.255.0# define CONFIG_IPADDR 192.168.2.21# define CONFIG_SERVERIP 192.168.2.16

etc.

You&#39;ll need to review the README file.

Regards,

--Scott