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<body class='hmmessage'><div dir='ltr'><font style="" color="#000000" face="Tahoma,sans-serif">The BBB actually uses a rather sophisticated power controller which manages the input power path. You can follow this by looking at the BBB schematic and also at the controller chip documentation. The paths for microusb and the AC adapter inputs are different in the chip.<br><br><a href="http://www.ti.com/lit/ds/symlink/tps65217.pdf" target="_blank">http://www.ti.com/lit/ds/symlink/tps65217.pdf</a><br><br><a href="https://github.com/CircuitCo/BeagleBone-Black/blob/master/BBB_SCH.pdf?raw=true" target="_blank">https://github.com/CircuitCo/BeagleBone-Black/blob/master/BBB_SCH.pdf?raw=true</a><br><br id="FontBreak"></font><font style="" face="Tahoma,sans-serif">Interestingly although not often talked about the controller includes a battery charging and controller circuit that could be used with the BBB.</font><font style="" face="Tahoma,sans-serif"> The connections are there to do it. The four pads behind the power connector.</font><br><br><b><font style="font-size:16pt;" size="4">73 Doug</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">WA3DSP</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">http://www.crompton.com/hamradio</font></b><font style="font-size:16pt;" size="4"><br></font><br><br><div><hr id="stopSpelling">Date: Thu, 8 Jan 2015 19:24:48 -0600<br>From: asylthe@kc9ona.com<br>To: arm-allstar@hamvoip.org<br>Subject: Re: [arm-allstar] Software ver 1.2 and BBB ver B<br><br><p dir="ltr">Jim,</p>
<p dir="ltr">I was having the exact same problem with my rev. B boards and ver. 1.2 of Doug's release. I ended up fixing the problem by powering the board via the barrel connector instead of the USB port. I never had the issue under ver. 1.1. I have 2 rev. B BBBs, and the same issue on both boards.</p>
<p dir="ltr">Thanks!</p>
<div class="ecxgmail_quote">On Jan 8, 2015 4:12 PM, "Jim Korenz" <<a href="mailto:n8pxw@yahoo.com">n8pxw@yahoo.com</a>> wrote:<br><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;"> I have a problem running the new version software v1.2, on the BBB rev B board. I got everything up and running with ver 1.2 a few nights ago. I had an Echolink connect running fine. The next morning the USB audio FOB was dark, no heartbeat LED. I unplugged the FOB, and reinserted it. No lights. I could login to the BBB with putty, so I restarted Asterisk. Still no lights. Finally I did a shutdown -r now. The BBB came back up with the FOB green led flashing after a min or so. I checked back in an hour or two, the fob was dead again. Same story, I had to shutdown and restart the opsys. This went on for a couple of days. Finally, I transferred the SD card to my backup board a BBB rev C. No problems, the boards been running for 2 or 3 days. I thought that the old BBB rev B took a crap. For grins, I reloaded the previous ver 1.1 on an SD card and brought up the rev B BBB board. It's been running for over 24hr with not a hang. It appears that the new rev<br>
1.2 has a problem with the old rev B BBB board. At least, it does with mine. Has anyone else had this problem?<br>
JimK N8PXW<br>
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