The PWR_BUT P9.9 pulled down to DGND by the DS3231 INT/SQW pin might be the same as pressing the POWER BUTTON
On Friday, 4 September 2020 at 22:51:05 UTC+1 [email protected] wrote: > That’s not quite what I am asking. I want to set the alarm in the DS3231, > shut down the BBB, completely, then have the Alarm / INT pin on the DS3231 > initiate a series of events that eventually powers on the BBB. Doing this, > I can achieve a true zero power sleep state. Nothing will draw power > except the coin cell on the DS3231. > > I can set the alarm in the DS3231 using python libraries, is it possible > to set that alarm using the device drivers? I have a bunch of relay and > delay circuits that area all working, this is the last link in the chain. > I will use the python if necessary but would prefer to use the kernel > drivers. > > I need the BBB to power up for a couple hours every two weeks and last for > a year on a stack of D cells; the normal sleep state draws too much power, > I want to shut it off. > > The reddit page I linked describes the exact same problem and solution for > RaspPi. Is there a similar solution for BBB? > > Thx, > Steve > > > > https://www.reddit.com/r/raspberry_pi/comments/bn2ht5/ds3231_rtc_using_the_alarm_function/ > > > On Sep 4, 2020, at 5:40 PM, Robert Nelson <[email protected]> wrote: > > On Fri, Sep 4, 2020 at 3:13 PM [email protected] > <[email protected]> wrote: > > > I do not know the AM3358 of the BBB, but from the schematic > P9.42 GPIO0_7 is XDMA_EVENT_INTR2 > > > Really any GPIO_0 can be used for "wake-up" from "suspend".. > > > https://e2e.ti.com/support/processors/f/791/t/243392?How-to-wake-up-the-BeagleBone > > > https://processors.wiki.ti.com/index.php/AM335x_Power_Management_Standby_User%27s_Guide#GPIO_wakeup > > It's not trivial.. > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ > > -- > 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/CAOCHtYjBba%2Byja4ZMqXU4u68YLvxFvveycJM5CM%2BQSmkZJmsxA%40mail.gmail.com > . > > > -- 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/93e424b3-0878-49e3-b19e-30adcb83b9d3n%40googlegroups.com.
