*Kernel*: Linux beaglebone 4.4.48-ti-r88 #1 SMP Sun Feb 12 01:06:00 UTC 2017 armv7l GNU/Linux *OS*: Debian 8.1
In order to get a low-power board, I get sensors data every 10min and I need to sleep meanwhile. I have an external RTC DS3231 with a SQW pin in order to setAlarm. I can plug it to a gpio and it changes its value when I want. What I would like is: 1) After the sampling, put the board in the highest low-power mode as possible (only the RTC running?) 2) Let the RTC wakup from suspension changing the gpio pin value I tried: root@beaglebone:/# echo standby > /sys/power/state The rtc set the gpio value from 1 to 0 but it doesn't wakeup. I think because I *don't have *the wakup option in /sys/class/gpio/gpio44/power. Right? How could I enable it? Is there a way to close the 3.3/5V output to the sensor when the device is sleeping and reopen it after wakeup? It this <http://processors.wiki.ti.com/index.php/AM335x_Power_Management_Standby_User%27s_Guide#GPIO_wakeup> guideline still good for my beaglebone green wireless? It tells to set echo uart0_rxd.gpio1_10=0x27,rising > standby_gpio_pad_conf but If I would set gpio P8_12? Something like: echo something.gpio44=0x??, falling > standby_gpio_pad_conf ??? Some tutorials speak about a GPIO0 use for wakeup. Which is in our BB? Is this the right way? Thank you for the support :D -- 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/ce98bb67-36b6-4d9f-9e00-d9b55fb970e4%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
