I did not find a hack for the BeagleBone Blue. Instead I used the ubuntu overlayroot package (https://packages.ubuntu.com/xenial/admin/overlayroot) to bring up the BBBlue with a read-only file system so that power can be removed while linux is running without corrupting the file system. I found this post by Rovert Nelson to be very helpful: https://forum.digikey.com/t/about-the-datetime-and-soft-power-off-for-bbb/2985/3
Best Regards, -Louis On Tuesday, June 25, 2019 at 2:14:57 PM UTC-4, Akshay wrote: > > Hi Louis, > > Did you manage to find a solution to this? We are trying to solve a > similar issue with the Beagleboard x15, to boot it up on receiving 12V > power from the DC jack, without the need for pressing the power button. > > Thanks! > Akshay > > On Thursday, 9 May 2019 06:43:39 UTC-7, Louis Whitcomb wrote: >> >> Dear Graham, >> >> Thanks for your reply! Yes, I am aware of power-on reset ICs, as well >> as simple power-on reset circuits with discrete components. I was hoping >> that the designers of the BeagleBone Blue, or experts on the OSD3358, might >> be aware solution that was already designed into the system (cut a trace, >> short an input, burn a fuse, etc). >> >> Thanks and Best Regards, >> >> -Louis >> >> On Monday, May 6, 2019 at 9:03:03 PM UTC-4, [email protected] wrote: >>> >>> Louis: >>> >>> There are multiple families of a type of IC known as a Power-On reset >>> IC, or supervisory reset IC >>> >>> They wait for a Voltage to appear above a threshold, and remain stable >>> for some period, then send a reset output for a predetermined time. >>> >>> If you go to the On Semi site, and search on "Power On Reset", you will >>> get hits about ten different ICs. >>> Check out the MAX809 as an example >>> >>> TI has a selector page, see >>> http://www.ti.com/power-management/supervisor-reset-ic/overview.html >>> >>> If you go to the On Semi site, and search on "Power On Reset", you will >>> get hits about ten different ICs. >>> Check out the MAX809 as an example >>> >>> They are generally cheap and small, and many require no support or glue >>> parts other than a bypass cap, if their default Voltages and times work for >>> you. >>> >>> --- Graham, >>> >>> >>>> -- 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/c1177974-241a-49f6-abb8-3588c9c51d7a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
