On Sun, 25 Jan 2015, John Syn wrote:
>
> On 1/25/15, 1:33 PM, "Robert P. J. Day" <[email protected]> wrote:
>
> >
> > still on the subject of filling out my wiki page here:
> >
> >http://www.crashcourse.ca/wiki/index.php/RCN_eewiki_BBB_page
> >
> >using the theme of minimal steps, each step being testable before
> >going on to the next step, first, if anyone wants to comment on what's
> >already there and suggest corrections, bring it on.
> >
> > and i was pondering what would be the very next "step" in the
> >process and realized, even before getting into building and letting
> >u-boot boot the kernel, the next teeny step would be to format the
> >rest of the card, then install *nothing* but /boot/uEnv.txt in the new
> >ext4 filesystem where u-boot would find it.
> >
> > does that make sense? it's the smallest unit of progress i can think
> >of that would still have an effect on the boot process. *then* the
> >kernel and the dtb ...
> Hi Robert,
>
> I understand what you are attempting to do, but won¹t it be more
> helpful if you explained to your students how to interpret the
> console output. For example if there is no MLO, you will see
> ³CCCCCC² printed. If it cannot find a valid u-boot or DTB file. What
> happens when there is no kernel magic number. What happens when
> there is no valid rootfs, etc. Just a thought.
all good points, but at the moment, i'm just trying to put together
something *very* quick and dirty for this week. and it's not meant to
be read standalone, it's meant to be accompanied by, well, me
standing up at the front walking people through it.
also, if i try to cover every conceivable detail and contingency,
then it's turning into a book, and that's *exactly* what i'm trying to
avoid.
rday
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Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
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