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Bazaar/Discussion/General/problem with QNX 6.5 and Beaglebone Black Rev C/List of Posts
Forum Topic - problem with QNX 6.5 and Beaglebone Black Rev C: (2 Items)
   
Update
Mehdi Karimi(deleted)
11/08/2014 3:15 PM
post112302
problem with QNX 6.5 and Beaglebone Black Rev C   
We encountered a problem getting QNX 6.5 onto a specific version of Beaglebone Black(BBB) Rev C.

It seems that there's a BOM change on the 4GB eMMC of the BeagleBone Black (BBB) Rev C.

We got two different BBB: one type with their 4GB eMMCs made by Kingston, and the other made by Mircron.

We can't get QNX running on BBBs having Kingston flash.

We suspect the problem might potentially be driver differences for eMMCs.

Attached is a file of the boot up log captured. The board keeps rebooting every time and goes through the same boot up 
sequence.

The image of the BBB Rev C with Kingston eMMC is attached.
Attachment: Compressed file QNX_BBB_Bootup_Issues.zip 2.07 MB
Dennis Kellly
11/08/2014 8:30 PM
post112303
Re: problem with QNX 6.5 and Beaglebone Black Rev C   
>>> The board keeps rebooting every time 
On rev C boards, the reset is due to the watchdog circuit resetting the board after 30 seconds.  It is unlikely eMMC is 
not the cause of the reset. 

The workaround is to hold down the "S2" button while you power up the board.  U-boot reads the S2 switch and performs 
some alternate processing which seems to defeat the watchdog firing.

You do not need to hold the S2 button if you soft reboot (QNX "shutdown" command).  S2 is required only on powerup.

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