> > *Hi all,* > > *My original reasoning behind the Power Cape was to get a 5V supply with a > low quiescent "off" current and that could restart the BeagleBone on a > scheduled timeout or external event. Using a 5V supply instead of the > PMIC's battery interface also allows for using USB devices. The battery > charger was added after the first prototype.* > > *As David pointed out, the INA219 allows system software to monitor the > battery voltage & current and take appropriate action. DC "power good" > from the charger is also available and can trigger power-up allowing the > BeagleBone to restart when power is restored. The micro-controller does a > few other things like RTC, WDTs, power-up retries, and holding reset during > power-up intended to make the system more reliable for remote operation. > The firmware is on Github if you need to customize behavior.*
All this can be done without using a cape. Whats more, using a single msp430g2553, and a few GPIO's you can have all of that, plus a watchdog reset, and whatever else you can dream up. So, I suppose the cape is just a matter of convenience. Which, there is nothing wrong with that, and I've been accused many a time of coming up with elaborate / extravagant solutions. When a simpler / easier one will do . . . On Wed, Jul 15, 2015 at 9:54 AM, Marlon Cesar Pilonetto < marlon.pilone...@gmail.com> wrote: > anyone knows how to completely disconnect the power management via > operating system without adding any circuit in the BBB? > > > Em quarta-feira, 15 de julho de 2015 12:05:44 UTC-3, Ron B. escreveu: >> >> Hi all, >> >> My original reasoning behind the Power Cape was to get a 5V supply with a >> low quiescent "off" current and that could restart the BeagleBone on a >> scheduled timeout or external event. Using a 5V supply instead of the >> PMIC's battery interface also allows for using USB devices. The battery >> charger was added after the first prototype. >> >> As David pointed out, the INA219 allows system software to monitor the >> battery voltage & current and take appropriate action. DC "power good" >> from the charger is also available and can trigger power-up allowing the >> BeagleBone to restart when power is restored. The micro-controller does a >> few other things like RTC, WDTs, power-up retries, and holding reset during >> power-up intended to make the system more reliable for remote operation. >> The firmware is on Github if you need to customize behavior. >> >> Hope this helps, >> -Ron >> >> On Wednesday, July 15, 2015 at 8:54:17 AM UTC-5, Marlon Cesar Pilonetto >> wrote: >>> >>> I am looking into the possibility of using the powercape, but otherwise >>> one has no choice to help with the solution of the problem? >>> >>> Em quarta-feira, 15 de julho de 2015 08:55:16 UTC-3, David Goodenough >>> escreveu: >>>> >>>> On Tuesday 14 July 2015 14:40:36 William Hermans wrote: >>>> > Just out of curiosity. What is the attraction of a "battery cape" ? I >>>> mean >>>> > I can see the need for consistent power, and perhaps keeping this as >>>> small >>>> > as possible, but is that it ? >>>> The main advantage if an integrated solution is that you get to monitor >>>> the >>>> supply and the battery from the manager chip. This way you can shut >>>> yourself >>>> down cleanly when the battery is about to give up, and go into power >>>> save mode >>>> when not running on the mains. >>>> >>>> How much of that this cape does I do not know. >>>> >>>> David >>>> > >>>> > I have always imagine using an "inline" power source such as a >>>> regulated >>>> > battery output to the barreljack, with a small inline mains to >>>> battery >>>> > charging circuit. But . . . yeah that's me. >>>> > >>>> > Anyway my comment is not meant to discourage, or discount other >>>> avenues of >>>> > thought. I'm simply curious. >>>> > >>>> > On Tue, Jul 14, 2015 at 10:23 AM, Colin Bester <bester...@gmail.com> >>>> > >>>> > wrote: >>>> > > Yup, that's what I do with the powercape from Andice Labs as >>>> mentioned >>>> > > above. Except for very low drain battery is essentially >>>> disconnected. >>>> > > >>>> > > I initially went the route of trying to use the onboard battery >>>> connector >>>> > > but it's not really a decent solution if you want solid system and >>>> battery >>>> > > management. >>>> > > >>>> > > On Tuesday, July 14, 2015 at 12:12:03 PM UTC-5, Marlon Cesar >>>> Pilonetto >>>> > > >>>> > > wrote: >>>> > >> Lords am new to the BBB and what I need is to turn off the battery >>>> > >> management so that when my system is not connected to battery is >>>> not >>>> > >> consumed in its entirety. >>>> > >> >>>> > >>> -- >>>> > > >>>> > > 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...@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. > -- 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.
