Gerald, Thanks for following up - do you mean that if I don't have anything writing to the file system, I can simply yank the power?
I naturally have seen the expansion header usage you listed in your response, is there something specific I should be looking at? On Monday, May 2, 2016 at 11:39:53 AM UTC-4, Gerald wrote: > > > > On Mon, May 2, 2016 at 10:36 AM, Yiannis Papelis <[email protected] > <javascript:>> wrote: > >> I have been building embedded systems for a while now and I am >> considering using the beaglebone (BBB) for an upcoming project, but I am >> confused by everything I read regarding the shutdown requirements. As an >> embedded system the only way to turn it off is to simply shutdown the power >> with a switch, yet my preliminary research indicates that this is a no-no >> as it may damage the BBB and/or corrupt the file system. I also read a lot >> of comments regarding voltage on the pins after a shutdown; in my case, >> very likely there will be a CAT5 cable with live activity connected even >> after power down; assume the magnetics should protect the BBB, but just >> checking. >> >> I have used quite a few micro controllers and various self-standing >> systems, but am fairly new to the BBB - still mostly reading about it. Am >> I missing something? How can a device meant to be used in embedded systems >> not be tolerant of power loss and be so finicky about power? >> >> By the way, I can see there is a battery backup circuit but I do not want >> to use a lithium battery for safety/temperature/cost reasons. Using a >> large capacitor also seems tricky as the shutdown may take a few seconds so >> I don't see how that will work. >> >> Any suggestions would be greatly appreciated. >> >> -- >> 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 [email protected] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/4b2dc307-631d-405d-88d6-7537adb3ac29%40googlegroups.com >> >> <https://groups.google.com/d/msgid/beagleboard/4b2dc307-631d-405d-88d6-7537adb3ac29%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > > Main reason for the shutdown process is the corruption of the Linux file > system. > > If you have power on any signal when the processor is shutdown, then you > are asking for trouble. > > > http://www.elinux.org/Beagleboard:BeagleBoneBlack#Expansion_Header_Pin_Usage > > > Gerald > > [email protected] <javascript:> > http://beagleboard.org/ > [email protected] <javascript:> > > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/6412f4c6-1897-4b97-872f-bddc255dc890%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
