thoughts for next steps...

[Jarielle Catbagan]

On Wed, Jun 24, 2015 at 7:35 AM, Ed Sutter <ed.sutter at alcatel-lucent.com> wrote:
> On 6/24/2015 10:35 AM, Jarielle Catbagan wrote:
>>
>> On Wed, Jun 24, 2015 at 7:17 AM, Ed Sutter <ed.sutter at alcatel-lucent.com>
>> wrote:
>>>
>>> On 6/24/2015 10:12 AM, Gedare Bloom wrote:
>>>>
>>>> On Wed, Jun 24, 2015 at 9:37 AM, Ed Sutter
>>>> <ed.sutter at alcatel-lucent.com>
>>>> wrote:
>>>>>
>>>>> Jarielle,
>>>>> Something to consider...
>>>>>
>>>>> I think the next two big steps are:
>>>>> - Init DRAM
>>>>> - Boot standalone (using uSD instead of UART)
>>>>>
>>>>> I believe your current plan was to work on DDR-init next; however it
>>>>> may
>>>>> be
>>>>> better (your choice, just adding my 2cents) to consider booting from
>>>>> microSD
>>>>> as the next task.  Here's why I say that...
>>>>>
>>>>> As you are playing with DDR-init you'll have to do a lot of restarting
>>>>> the
>>>>> board.
>>>>> Each time you do that, you'll have to reboot using Xmodem.  This
>>>>> requires
>>>>> a
>>>>> few manual steps: hold boot button while power cycling, then issue
>>>>> xmodem...
>>
>> If I am understanding you correctly, I actually don't have to power
>> cycle the board anytime the board hangs.  I just simply reset via the
>> reset button and then issue an xmodem transfer again without touching
>> any cables and restarting my terminal emulator.  I hope I did not
>> misunderstood you :-)
>
> Yep, either way (power cycle or reset button), its a simpler reboot if it
> occurs without
> xmodem.
>

I agree!  I'll get started asap.

>>
>>>>> Alternatively, if you get the boot-from-uSD card stuff working, and
>>>>> then
>>>>> erase
>>>>> the eMMC (causing the cpu to automatically boot from uSD), you should
>>>>> be
>>>>> able to just push the reset button to restart a locked up board.
>>>>>
>>>> In other words, it has a tighter develop-execute-debug loop.
>>>
>>> Exactly.
>>>>
>>>>
>>>>> It would just be easier (IMHO) if the board could reset with this basic
>>>>> uMon
>>>>> image
>>>>> (what you have running now) by default.  Know what I mean?  If yes,
>>>>> what
>>>>> do
>>>>> you think?
>>
>> I think it's a great idea.  Yesterday I was deciding what I should
>> finish first, which was either DDR-init or boot off of an uSD card.
>>
>> I will definitely start getting the uSD card booting to work as soon
>> as possible.
>>
>> Right now I am at my university (taking summer classes) and I don't
>> have access to an uSD card (left it at home).  But I did bring my
>> Beaglebone Black with me as well.  So I'll continue working on
>> DDR-init, and when I get home I'll immediately start working on
>> getting Umon to boot of a uSD card.
>>
>>>>> Ed
>>>>> _______________________________________________
>>>>> umon-devel mailing list
>>>>> umon-devel at rtems.org
>>>>> http://lists.rtems.org/mailman/listinfo/umon-devel
>>>
>>>
>>>
>>> --
>>> Ed Sutter
>>> Alcatel-Lucent Technologies -- Bell Laboratories
>>> Phone: 908-582-2351
>>> Email: ed.sutter at alcatel-lucent.com
>>>
>>>
>>> _______________________________________________
>>> umon-devel mailing list
>>> umon-devel at rtems.org
>>> http://lists.rtems.org/mailman/listinfo/umon-devel
>
>
>
> --
> Ed Sutter
> Alcatel-Lucent Technologies -- Bell Laboratories
> Phone: 908-582-2351
> Email: ed.sutter at alcatel-lucent.com
>
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