Additionally. In our case we have ~1000ma 3.7v LiPO batteries hook up to a couple of our BBB's here. The board shuts down almost immediately( cleanly ). So the BBB will only probably run off this battery for a couple hours, but the MSP430G2* could run off that battery for years. Assuming te battery did not self discharge long before that. Which is probably exactly what it'd do.
On Mon, May 16, 2016 at 1:24 PM, William Hermans <[email protected]> wrote: > *There are a lot of cheap power supplies out there that do not like any >> drops on the mains, not very well filtered or robust. These can play havoc >> on the HW.* >> >> *The BBB is a low cost board, with people trying to make it cheaper all >> the time. To make it cheap something had to go. What you are talking about >> here, is one of the things that went. An Atmel Tiny would be perfect as a >> power monitor. It can shut it down and wake it up once the power comes >> back. Even if it goes down for a moment, you can play it safe and shut it >> down and wait a while. Your call* >> >> *All you have to do is add it to the board.* >> >> >> *Gerald* >> > Yeap, exactly our thoughts here. The Micro used is really inconsequential. > So long as it does everything *you* want it to do. I do not know Atmel > parts well at all, but I do know several MSP430's. ST Micro MCU's would > probably work too, as well as NXP's LPC800. > > I picked the MSP430G2553, again, because I know the MCU better than most > others. It also has hardware on chip ADC which I wanted to monitor input > power. No other micro that I've looked at in the same price range had > everything I wanted. > > @other nay sayers. > Also as I stated before the MSP430G2* series has very robust PoR / BoR > internal circuitry. It may lose power, but you're never( very unlikely ) > going to stop it coming back up again exactly as planned. Unless power is > removed gain . . . this is not some embedded linux system that can have > its disk corrupted. This is a very robust, bare metal MCU that is meant to > be used in conditions like these. > > On Mon, May 16, 2016 at 1:01 PM, lachlan <[email protected]> wrote: > >> >> This what you need is this, A small micro (stm8 is cheap and do just >> fine) .. which talks to the BBB over the serial port, so you can >> send/receive commands/status..(pick your test) load info.. etc.. >> this small micro is always power cyclical s once every 2 mints lets >> say.. you can never prevent the small micro from being power cycled. >> It save's what is was doing.. and wake's up on the next power up.. >> check to see what test it was running.. lets say CPU load on the BBB, if >> outside of allowed.. time.. load.. etc... >> your reset's the BBB, or power cycle, you can also check for correct >> power up of the BBB, and switch it too a diff-ant boot source etc.. >> so.. if the small micro git hit my a cosmic ray.. for example if will >> always power cycle.. of and on.. clear the error.. and recover. >> you can also setup long path check's.. so a token is send to the BBB >> which has to come back in some time frame etc.. if out side the test >> range... your BBB task is frozen and needs a reset.. etc.. >> Pick you test... >> >> Lachlan. >> >> >> -- >> 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/27b49949-a0f8-447c-a52e-9459da0d0bfe%40googlegroups.com >> <https://groups.google.com/d/msgid/beagleboard/27b49949-a0f8-447c-a52e-9459da0d0bfe%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORqLWuJoxAuZHKirBmb7Gy1aw0fiLqHwa9e-pWXG0ZfXTQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
