On Mon, May 2, 2016 at 10:36 AM, Yiannis Papelis <[email protected]> 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]. > 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] http://beagleboard.org/ [email protected] -- 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/CAHK_S%2BergZ8%2BPd5zBdxsHqJDzQphgPXKXF0oayzjV1PVHPY8kw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
