On 5/11/19 1:43 am, Chris Clinton wrote:
> I can successfully boot from the USB hard drive by executing manually the
> following commands from the u-boot prompt, but have not successfully
> automated these commands. Can I update u-boot to automatically attempt USB
> boot?
> usb start
> bootpart=0:1
> bootdir=/
> fatload usb 0:1 ${loadaddr} /uImage
> fatload usb 0:1 ${fdtaddr} /am335x-boneblack.dtb
> setenv bootargs console=${console} ${optargs}
> bootm ${loadaddr} - ${fdtaddr}
Your easiest bet would be to have a small boot-strap MicroSD card that
has U-Boot configured to boot from USB.
U-Boot stores its configuration in environment which can be persisted to
an EEPROM or disk/SD card partition, not sure how the BeagleBoard
instances are set up in this regard.
If you run `printenv` you'll see all the variables that are set.
`setenv` modifies a variable, and `saveenv`, saves the current set of
variables to that non-volatile storage volume.
http://www.denx.de/wiki/view/DULG/UBootEnvVariables documents all the
variables. Many of these you'll see are "scripts" which are executed
with the `run` command.
If the persistent storage is set up, you should be able to configure
U-Boot, then run `saveenv` to store the configuration -- rebooting
should have the board run your commands automatically.
Failing that, you'll need to re-compile U-Boot with the appropriate
default environment settings -- doable, but you risk bricking the board
if something goes wrong.
> Buildroot is automatically looking for the micro SD card due to the
> /etc/init.d/S99autorun file. How do I edit this file?
I'd imagine running `sudo -s` then using `${EDITOR}
/etc/init.d/S99autorun` to modify the file.
--
Stuart Longland (aka Redhatter, VK4MSL)
I haven't lost my mind...
...it's backed up on a tape somewhere.
--
For more options, visit http://beagleboard.org/discuss
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