thoughts for next steps...

Ed Sutter ed.sutter at
Wed Jun 24 14:17:24 UTC 2015

On 6/24/2015 10:12 AM, Gedare Bloom wrote:
> On Wed, Jun 24, 2015 at 9:37 AM, Ed Sutter <ed.sutter at> 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...
>> 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.
>> 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?
>> Ed
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Ed Sutter
Alcatel-Lucent Technologies -- Bell Laboratories
Phone: 908-582-2351
Email: ed.sutter at

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