Hi, Could this be related to random reboots on BBB ? <https://gitlab.exmachina.fr/EXM/eisla/meta-exm-core/issues/1> See this thread for more details: https://groups.google.com/forum/#!msg/beagleboard/RMOTnQBgIo8/q5vzpFPLlhgJ
We found out the issue / causes are still present on a 4.1 kernel. Le samedi 10 août 2019 04:53:23 UTC+2, Robert Heller a écrit : > > At Fri, 9 Aug 2019 21:14:50 -0500 beagl...@googlegroups.com <javascript:> > wrote: > > > > > > > As I said, P1-Pin-1 and the microUSB connector power are two different > > inputs to two different power supplies. Having power on both of them is > > not a problem, and in fact, will prevent the problem of instability I > was > > concerned about. > > > > So, no problem powering both. > > > > The concern with the random crashes is just that, it could take three > days, > > or could happen in the first hour. > > I would power the unit from both pins, if it is doing something at all > > important. > > > > Of course, my crashing experience is from 18 months ago, and there have > > been a lot of software releases since then. > > So you believe it was some sort of software issue, rather than a hardware > design problem? > > > > > I would encourage you to run some endurance tests on your board, before > > putting it in service. > > OK, I can do that at some point. > > > > > --- Graham > > > > == > > > > On Fri, Aug 9, 2019 at 8:34 PM Robert Heller <hel...@deepsoft.com > <javascript:>> wrote: > > > > > At Fri, 9 Aug 2019 16:23:26 -0700 (PDT) beagl...@googlegroups.com > <javascript:> > > > wrote: > > > > > > > > > > > > > > > > > > > Robert: > > > > > > > > It has been a while, almost a year since I did any testing with the > > > > PocketBeagle. > > > > But I don't think anything has changed relative to my comments > below. > > > > Maybe someone can correct me if I am wrong, and some things have > been > > > fixed. > > > > > > > > P1-Pin-1 is Vin, and is equivalent to the Barrel Jack input on the > > > > Beaglebone Black, it > > > > is a separate power supply input, and is isolated from the microUSB > > > > connector power. > > > > > > > > P1-Pin-7 is hardwired to the +5 pin on the microUSB connector, USB > Port > > > 0. > > > > It is not clear from the schematic, but is visible if you view the > PCB > > > > board plots. > > > > Or check it with an Ohmmeter. > > > > > > > > I found that the PocketBeagle, when powered exclusively by P1-Pin-1 > > > would > > > > randomly > > > > crash about once every 24 hours of operation, without any apparent > > > reason, > > > > or > > > > any clue in the logs. I hope that this has been fixed, but I have > seen > > > > other reports > > > > since I initially reported it, and nothing since that reported a > fix. > > > > > > Well, I am not expecting an application that would run 24/7. I am > working > > > on > > > model RR control circuits. It does not sound like this should be an > > > immediate > > > problem. > > > > > > > > > > > > > > The only workaround I found was to power P1-Pin-1 and P1-Pin-7 in > > > parallel, > > > > in which case > > > > it does not crash, but now there is no isolation between USB +5V and > > > your > > > > independent > > > > PB power supply, and, as you are concerned about, all kinds of > > > cross-feed > > > > and back > > > > powering can occur. > > > > > > That does not sound like a really good idea. > > > > > > Question: if the board was powered from P1-Pin-1 *and* the USB will > there > > > be > > > problems? Right now, that is my main concern. Jacking in the USB > (for > > > file > > > transfer mostly, since I can use the serial console for debugging) > while > > > the > > > board is being powered via P1-Pin-1 is something I'd like to be able > to > > > do, > > > but don't want to fry anything. > > > > > > > > > > > I suggest you read the email thread "PocketBeagles are Unstable" > started > > > > 11/24/2017 > > > > > > Will have a look. > > > > > > > > > > -- > Robert Heller -- 978-544-6933 > Deepwoods Software -- Custom Software Services > http://www.deepsoft.com/ -- Linux Administration Services > hel...@deepsoft.com <javascript:> -- Webhosting Services > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/a8473b3c-9234-43b2-bf8a-a3f2e2471d68%40googlegroups.com.
