SK-AM62B-P1: Issue with Setting UBOOT_MACHINE Variable in Command Line - Processors forum - Processors

Processors forum

State Resolved
Locked Locked
Replies 3 replies
Answers 1 answer
Subscribers 98 subscribers
Views 261 views
Users 0 members are here

Support feedback

Options

Murali Vikash Ganireddy

Intellectual 470 points

Part Number: SK-AM62B-P1

Subject: Issue with Setting UBOOT_MACHINE Variable in Command Line

Hi team,

I'm encountering an issue while attempting to set my UBOOT_MACHINE variable during the command line execution. Here's the command I'm using:UBOOT_MACHINE=am62x_evm_r5_defconfig bitbake tisdk-base-image.

I've added the following line to my am62xx-evm-k3r5.conf file: UBOOT_MACHINE ??= "". However, despite this configuration, the command doesn't seem to recognize the variable when specified in the command line. Surprisingly, it works as expected when added to the local.conf file.

Could you please assist me in resolving this discrepancy?

Reagrds,

Vikash

over 2 years ago

0 Andreas Dannenberg over 2 years ago

TI__Guru 70612 points

You can't override the variables from the conf/* *.conf and *.inc files in your conf/local.conf files. But what you can do is either modify those directly if you need to, or add a new/different set of files for your needs. But if you really want to override the settings there does seem to be a way though which is placing them into your own layer, and making sure that layer is listed first in your conf/bblayers.conf file. See here for details:

https://docs.yoctoproject.org/pipermail/yocto/2018-January/039610.html

Regards, Andreas

0 Murali Vikash Ganireddy over 2 years ago in reply to Andreas Dannenberg

Intellectual 470 points

Hi Andreas,

I'm looking to create a flag-based command for executing patch files in a .bbappend file. Is it possible to achieve this directly from the command line, like so: ENABLE_SPI=1 bitbake tisdk-base-image? If it is possible, could you please guide me on how to do it?

Regards,

vikash

+1 Andreas Dannenberg over 2 years ago in reply to Murali Vikash Ganireddy

TI__Guru 70612 points

Hi Vikash,

You can query the environment from the Yocto scripts and probably make this work but I'm not sure that is the cleanest way. I'm on business travel this week so I can't experiment with this but why don't you give this a try on your end and report back here. Some pointers and things to keep in mind:

Make sure to add the ENV variable you want use propagates to the Yocto build process by adding it to https://docs.yoctoproject.org/bitbake/2.8/bitbake-user-manual/bitbake-user-manual-ref-variables.html#term-BB_ENV_PASSTHROUGH_ADDITIONS
Access that ENV variable using os.environ.get("ENABLE_SPI") from within your scripts and then based on if this variable exists or not or what the contents is you can do some conditional processing in your recipes. If not sure how to do that I'd recommend doing a `grep` search across the Yocto source trees for os.environ.get() for some examples you can see,

Regards, Andreas