Re: [U-Boot] U-boot Config Parameters on Compact Flash
Dear "Dach Miroslaw",
please always keep the mailing list on Cc:
In message 1B4F8000449511488D1A640DD6DECA350392A614@MAILBOX0A.psi.ch you wrote:
I am sorry bothering so much but this Compact Flash issues is the showstopper for my project.
If it's really urgent you should consider engaging commercial support. This would probably be the fastet nd most reliable way to solve your issue quickly. As far as free community support is concerned, this is all done on a voluntary base, and you might even run into the effects described here: http://catb.org/esr/faqs/smart-questions.html#urgent
Please let me write what I understood from your idea. Please correct me if I am wrong.
In the include config file I should say #define CONFIG_ENV_IS_NOWHERE meaning take the default environ configuration is built in the u-boot itself.
You should try and read some documentation to get a better understanding of the terms.
CONFIG_* variables are compile-time settings. They determine what get's built into the U-Boot image running on your target.
This is different from envrionment variables, which can be loaded, changed, and stored in the running system.
The only relation between the two is that you can use CONFIG_ settings to define thedefault environment which gets used when no valid environment can be found.
Next, when the u-boot is booted the environment variables should be imported from Compact Flash. This is done in two steps:
- ide read (read the u-boot config from Compact Flash to RAM ?)
- env import (import u-boot config from RAM to u-boot?)
Right.
Could you please give me more hints which CONFIG macros should/could be used for the above mentioned steps.
This has nothing to do with any CONFIG_ settings. Of Course I assume that the "ide" command is enabled in your configuration so you can access the CF card.
Is there any command to import/export u-boot config.
Yes, as noted: "env import" and "env export". Try "help env".
So far I was using saveenv to export/save u-boot config into Flash?
"saveenv" ist just an alias for "env save", whichis a somewhat specialized version of "env export" (and which is not enabled in your system when you define CONFIG_ENV_IS_NOWHERE).
Best regards,
Wolfgang Denk
Dear Wolfgang,
Thank you very much for your hints. Now, I have got an idea how to continue.
Could you please direct me to some manual/"how to" to find out how to configure IDE access by means of the CONFIG_IDE_* . I have examined several header files in u-boot/include/configs and it seems to be that CONFIG_ATA_* could be/should be used in conjunction with CONFIG_IDE_*?
Best Regards
Mirek
-----Original Message----- From: Wolfgang Denk [mailto:wd@denx.de] Sent: Fri 1/21/2011 2:08 PM To: Dach Miroslaw Cc: u-boot@lists.denx.de Subject: Re: [U-Boot] U-boot Config Parameters on Compact Flash
Dear "Dach Miroslaw",
please always keep the mailing list on Cc:
In message 1B4F8000449511488D1A640DD6DECA350392A614@MAILBOX0A.psi.ch you wrote:
I am sorry bothering so much but this Compact Flash issues is the showstopper for my project.
If it's really urgent you should consider engaging commercial support. This would probably be the fastet nd most reliable way to solve your issue quickly. As far as free community support is concerned, this is all done on a voluntary base, and you might even run into the effects described here: http://catb.org/esr/faqs/smart-questions.html#urgent
Please let me write what I understood from your idea. Please correct me if I am wrong.
In the include config file I should say #define CONFIG_ENV_IS_NOWHERE meaning take the default environ configuration is built in the u-boot itself.
You should try and read some documentation to get a better understanding of the terms.
CONFIG_* variables are compile-time settings. They determine what get's built into the U-Boot image running on your target.
This is different from envrionment variables, which can be loaded, changed, and stored in the running system.
The only relation between the two is that you can use CONFIG_ settings to define thedefault environment which gets used when no valid environment can be found.
Next, when the u-boot is booted the environment variables should be imported from Compact Flash. This is done in two steps:
- ide read (read the u-boot config from Compact Flash to RAM ?)
- env import (import u-boot config from RAM to u-boot?)
Right.
Could you please give me more hints which CONFIG macros should/could be used for the above mentioned steps.
This has nothing to do with any CONFIG_ settings. Of Course I assume that the "ide" command is enabled in your configuration so you can access the CF card.
Is there any command to import/export u-boot config.
Yes, as noted: "env import" and "env export". Try "help env".
So far I was using saveenv to export/save u-boot config into Flash?
"saveenv" ist just an alias for "env save", whichis a somewhat specialized version of "env export" (and which is not enabled in your system when you define CONFIG_ENV_IS_NOWHERE).
Best regards,
Wolfgang Denk
Dear "Dach Miroslaw",
In message 1B4F8000449511488D1A640DD6DECA350392A61B@MAILBOX0A.psi.ch you wrote:
Could you please direct me to some manual/"how to" to find out how to configure IDE access by means of the CONFIG_IDE_* . I have examined several header files in u-boot/include/configs and it seems to be that CONFIG_ATA_* could be/should be used in conjunction with CONFIG_IDE_*?
I'm not an expert with Xilinx FPGAs and have no idea what needs to be done to enable the ACE in them. A "grep SYS_ACE" in include/configs/* turns up only the icon and katmai boards that appearently enable a Xilinx ACE controll, but these are PPC440SPe boards, i. e. no Xilinx FPGA based solutions.
You will have to read the respective user manuals yourself.
Or hire an expert.
Best regards,
Wolfgang Denk
Dear Wolfgang,
Thank you very much for your hints. This is a good staring point for me to continue with u-boot and Compact Flash.
Best Regards
Miroslaw Dach
-----Original Message----- From: Wolfgang Denk [mailto:wd@denx.de] Sent: Sat 1/22/2011 8:39 PM To: Dach Miroslaw Cc: u-boot@lists.denx.de Subject: Re: [U-Boot] U-boot Config Parameters on Compact Flash
Dear "Dach Miroslaw",
In message 1B4F8000449511488D1A640DD6DECA350392A61B@MAILBOX0A.psi.ch you wrote:
Could you please direct me to some manual/"how to" to find out how to configure IDE access by means of the CONFIG_IDE_* . I have examined several header files in u-boot/include/configs and it seems to be that CONFIG_ATA_* could be/should be used in conjunction with CONFIG_IDE_*?
I'm not an expert with Xilinx FPGAs and have no idea what needs to be done to enable the ACE in them. A "grep SYS_ACE" in include/configs/* turns up only the icon and katmai boards that appearently enable a Xilinx ACE controll, but these are PPC440SPe boards, i. e. no Xilinx FPGA based solutions.
You will have to read the respective user manuals yourself.
Or hire an expert.
Best regards,
Wolfgang Denk
participants (2)
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Dach Miroslaw -
Wolfgang Denk