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 <[email protected]> >> > >> > 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 [email protected]. >> > > 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]. For more options, visit https://groups.google.com/d/optout.
