[arm-allstar] BBB locking up

[(KP4TR)Ramon Gonzalez]

Hello,

A friend was having issues with his BBB and ordered a shorter USB to URI 
cable. And problem went away. The URI USB cable is a bit long and a 
shorter cable is better to avoid EMI interference from the radio.


On 8/13/2014 3:31 PM, Doug Crompton wrote:
> Yes this can be an issue and is usually caused by EMI either from an 
> RF source or a switching power supply. An HF station or other high RF 
> source can definitely cause it and this is not specific to the BBB it 
> also happens on a PC. Ferrites over the USB and radio leads often 
> solves the problem. Also keep leads short and wind extra length in 
> tight circles. The power supply problems cannot be solved by ferrites 
> and is often caused by bad wall warts that have high common mode 
> voltages. This couples through the BBB over the USB cable to a radio 
> ground. You can check this with a scope. A fix would be to run the BBB 
> from a linear supply or from your radio 12V supply with a 1A three 
> terminal 5V regulator on a heat sink.
>
> I have about 6-8 BBB's running and I have not had the issue in general 
> running although I can reproduce it. I do put ferrites on my leads and 
> I use power supplies that do not have high common mode voltages.
>
> Now the good news -  We are working on a new version with much 
> improved USB recovery support in a new kernel. It will now recover 
> from USB problems completely in usbradio. In our tests you can pull 
> the USB cable out and put it back in hot and it will recover. We are 
> still working on getting the same results with simpleusb which is the 
> recommended mode for the BBB. So try the above fixes and if you are 
> still having problems rest assured there is a real fix in the future.
>
> *73 Doug
> WA3DSP
> http://www.crompton.com/hamradio*
>
>
> ------------------------------------------------------------------------
> Date: Wed, 13 Aug 2014 12:43:43 -0500
> From: nx4y at verizon.net
> To: arm-allstar at hamvoip.org
> Subject: [arm-allstar] BBB locking up
>
> Has anyone had issues with their BBB locking up when using a DMK URI?  
> I have left mine running overnight only to find the next morning the 
> green URI light isn't blinking, or today, it was sort of "dimming" 
> instead of flashing on and off. Yesterday when this happened I tried 
> to SSH in, and when i entered my password the BBB locked up 
> completely, couldn't even ping it! Had to power down and back up.  
> Today I could ssh in, but the URI still wouldn't go back to blinking. 
> This wont do for a remote site, obviously.. anyone else seen this or 
> have any ideas for a cure?
>
>
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> http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/
>
>
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