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Zedboard occasionally self restarts

Former Member

Hi all!

 

My zedboard "restarts" after some time. I have two actually (university program) and both show signs of this. I thought it was my design/linux but even with the stock CD card I could reproduce this behaviour.

I can't find anywhere, anyone else with these issues. 

 

I built a custom petalinux distro with my custom hw design and ran a program that is supposed to run for more than 2h on it. On the first board it died roughly after 1h:39m.

I first thought it was my custom app that crashes or an ssh timeout issue.

I tried running uptime in the shell and sure enough after this crash the uptime says the board is up for a couple of minutes instead of the 1h:39m.

I then ran a bash script with an infinite loop to print the uptime periodically and ran it with nohup in the background so I could log out.

while true
do
    uptime
    sleep 5
done
 
And the board resets itself which can be verified in the nohup.log logfile. At a certain point in time, roughly the same time, the entries stop in the logfile. The board "reset" itself.
 
I then booted the stock SD card and did the same (without the log) over serial.
 
Same thing....
 
Then I tried the other zedboard from the university, with the stock card and it ran through the night. Great!
I switched to my design/petalinux os  and all seemed great. But after a while it started exhibiting the same issue.
 
 
What am I doing wrong?
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  • 0 in reply to jafoste4

    Thank you for the hint.

    I don't think overheating was the case. I did not measure it with a thermometer but on touch it felt only slightly warm.

     

    However...

    I have been in touch with the support staff from Xylon (local company that uses Xilinx products). They hinted at the possibility of a power supply issue.

    There seems to have been a voltage differential between the Oscilloscope ground and the zedbaord ground. Even though they are connected to the same power outlet.

    I accidentally noticed that connecting the ground caused the HW to "reset", all the leds turned off and then on.

    The OS and programs running on it did not terminate, not until later as described in the original post.

     

    When I ran the board without the connected oscilloscope it ran for days...

     

    Hope this helps someone.

    Br,