Umon command line reached in BBB

Ed Sutter ed.sutter at
Thu Jun 18 11:27:00 UTC 2015

Yep, that's odd.  Should not hang.
> Ed,
> I apologize for the misinterpretation/confusion.  My brain was
> thinking one thing but I managed to state something else.  What I
> actually meant to say was that some commands will not work just yet.
> Like the ARP, DHCP, or any of the TFS commands since the ethernet and
> flash drivers will have to be implemented first.
> I am still analyzing the results that I got, in particular when I
> executed the "help" command.  I am going to start looking into why its
> hanging, i.e. no help text is outputted.  Just wanted to ask, do you
> have any idea why it might be hanging?
> On Wed, Jun 17, 2015 at 3:57 PM, Ed Sutter <edsutterjr at> wrote:
>> Jarielle,
>> Those commands will work as long as you access valid memory.
>> Ed
>>> Going off of the discussion that I had with Ed in regards to getting a
>>> fully internal SRAM mapped Umon image to work before proceeding to
>>> implement the DDR3 configuration to have the RAM used by Umon mapped
>>> there, I went ahead and started working on it.
>>> I configured the Umon image to be fully mapped within the internal
>>> SRAM of the AM335x (i.e. BOOTROMBASE/BOOTRAMBASE defined to be within
>>> the internal SRAM with their corresponding lengths ensured to not
>>> overlap each other and to not exceed the SRAM boundaries), and then
>>> enabled INCLUDE_MEMCMDS by setting it to test the DM and PM commands.
>>> I know that these commands will not work properly given the fact that
>>> DDR3 is not set up yet, but just wanted to see if some command
>>> execution is possible.
>>> I then proceeded to build the image and then booted the image on the
>>> BBB via UART.  Once booted, the Umon command line was presented and
>>> did some command execution testing.  Nothing works properly as of
>>> right now, but now that I am able to reach the Umon command line I can
>>> now proceed to getting the other functions implemented.
>>> My results of getting the Umon command line on the BBB can be found in
>>> the screen capture provided below.
>>> _______________________________________________
>>> umon-devel mailing list
>>> umon-devel at
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Ed Sutter
Alcatel-Lucent Technologies -- Bell Laboratories
Phone: 908-582-2351
Email: ed.sutter at

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