Hello David, Yes you are right. If I cannot solve this shutdown problem it's probably the only solution.
But it's frustrating when you think that the BeagleBone Black has its own battery charger and own UPS that can only run during 60 seconds because of this self shutdown problem ! Why does it work correctly on a BBB running a VoIP PBX (probably running with Ubuntu) and not with a Debian or Angström distribution ? I would prefer Debian or Angström built for BeagleBone Black distribution not to be able to make a self shutdown and let this possibility to the user. An external backup UPS draws also additional current when running. I wanted to keep power consumption as low as possible. Moreover, I don't need 5V from the BBB when running under UPS mode. If a know that a SW solution exists, I won't give up so easily. :-) Kind regards Michel. 2014-10-17 0:13 GMT+02:00 David Funk <dwf...@gmail.com>: > Maybe use a battery backup UPS to run your 5 volt power supply to the BBB? > > > > -david > > On Thu, Oct 16, 2014 at 12:49 PM, Michel Gerin <mich.ge...@gmail.com> > wrote: > >> Hello Robert, >> >> Thank you spending your time to help me. >> >> First of all, sorry if I didn't explain things correctly. I think there >> is a misunderstanding (I am French speaking) . >> >> I don't want BeagleBone to perform a shutdown during power outage. I want >> BBB running continuously like my VoIP PBX also based on BeagleBone Black. >> But I think, that in this later case, the developper used Ubuntu (neither >> Debian nor Angström). As these OS are official BBB OS, I prefer using them >> for my application. I am electrician, I don't really want to spend too much >> time on SW bugs as I am not skilled for that task. >> >> One word perhaps about the application: it is very simple. I must monitor >> mains power supply in different locations and have to log power outage >> events on a file with time stamps. I have also to log grid >> switching events ... The specialized 230V AC monitoring system has no >> Ethernet connection but can be associated with BBB GPIO's. So that log file >> could be downloaded when power outage is over. >> >> The problem is that, even with battery plugged in, the BeagleBone Black >> perform a self shutdown within 60 seconds after mains power off (5V DC >> power supply)... >> >> Hope my explanation is now better. >> >> Kind regards >> >> Michel. >> >> >> >> 2014-10-16 19:04 GMT+02:00 Robert Nelson <robertcnel...@gmail.com>: >> >>> On Thu, Oct 16, 2014 at 12:00 PM, Michel Gerin <mich.ge...@gmail.com> >>> wrote: >>> > Thank you for your quick reply. >>> > >>> > you wrote: >>> > >>> >> >>> >> No shutdown is a function of the SW.The SRM covers the hardware. >>> > >>> > >>> > OK, than I suppose that somewhere in the whole Debian package, a >>> routine >>> > is permanentely checking (polling) if 5V DC power supply is still >>> "ON". >>> > When it is not the case an event is fired in order to start a clean >>> > shutdown procedure? Am I correct ? Does this happen via the I²C bus ? >>> Does >>> > this routine makes a polling to the TPS65217C PMIC ? >>> >>> Nope you need to tell it.. >>> >>> Either via: "sudo halt" or.. setup a pin/interrupt to trigger systemd >>> to shutdown the system.. >>> >>> Regards, >>> >>> -- >>> Robert Nelson >>> http://www.rcn-ee.com/ >> >> > > -- > 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. > For more options, visit https://groups.google.com/d/optout. > -- 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. For more options, visit https://groups.google.com/d/optout.
