Hi Jesse, About two years ago I used exactly the nucleo-l476rg board to test low power mode on NuttX, but I didn't use it with Tickless.
I can try to find my config, but I put the test on my blog at that time: https://acassis.wordpress.com/2020/05/03/testing-nuttx-low-power-modes/ Did you test the PM mode with normal scheduler ? BR, Alan On 6/15/22, Jesse Jensen <jessejen...@geotab.com.invalid> wrote: > Hello Alan, > Thank you for your response. The arm_pminitialize function exists, but > contains no logic Viewing implementations of that functions on other > boards, they are mostly empty as well, with a couple also including > led_pminitialize functions and/or pmbutton functions. As I am not > (currently) using push buttons to wake from sleep nor am I using the LEDs > to monitor the power manager, I do not think that logic is applicable. > > Thank you for your help, > > Jesse Jensen (he, him, his) > Geotab > > Embedded Engineer > > Direct > Toll-free > > Visit > > +1 (702) 409-1041 > +1 (800) 397-7102 > www.geotab.com > > Twitter <https://twitter.com/geotab> | Facebook > <https://www.facebook.com/Geotab> | YouTube > <https://www.youtube.com/user/MyGeotab> | LinkedIn > <https://www.linkedin.com/company/geotab/> > > > On Tue, Jun 14, 2022 at 12:00 PM Jesse Jensen <jessejen...@geotab.com> > wrote: > >> Hello, >> >> I am using the STM32L4 (nucleo-l476rg board) and am attempting to enter >> the mcu's low-power modes (i.e. Stop1, Stop2, Standby). Within >> stm32_idle.c >> under PM_IDLE, I send the "wfi" command to send the device into sleep. >> However, when measuring the current draw of the mcu, I can see that the >> device is drawing much more power than it should be from any of the >> low-power modes. It appears that it is either not entering the low-power >> modes or is quickly woken out of them. I have enabled Tickless OS using >> its >> interval timer to prevent scheduler interrupts that would bring the >> device >> out of lp modes. Is there something that I am missing? >> >> Below are my configurations that seemed relevant to the problem at hand. >> >> CONFIG_STM32L4_TIM2=y >> CONFIG_STM32L4_TIM5=y >> >> # >> # Timer Configuration >> # >> CONFIG_STM32L4_ONESHOT=y >> CONFIG_STM32L4_FREERUN=y >> CONFIG_STM32L4_TICKLESS_ONESHOT=2 >> CONFIG_STM32L4_TICKLESS_FREERUN=5 >> CONFIG_STM32L4_ONESHOT_MAXTIMERS=1 >> >> # >> # Clocks and Timers >> # >> CONFIG_ARCH_HAVE_TICKLESS=y >> CONFIG_SCHED_TICKLESS=y >> # CONFIG_SCHED_TICKLESS_ALARM is not set >> CONFIG_SCHED_TICKLESS_LIMIT_MAX_SLEEP=y >> CONFIG_USEC_PER_TICK=10000 >> # CONFIG_SYSTEM_TIME64 is not set >> # CONFIG_ARCH_HAVE_TIMEKEEPING is not set >> # CONFIG_JULIAN_TIME is not set >> CONFIG_START_YEAR=2018 >> CONFIG_START_MONTH=1 >> CONFIG_START_DAY=1 >> CONFIG_PREALLOC_TIMERS=4 >> >> # >> # Buffering >> # >> # CONFIG_DRVR_WRITEBUFFER is not set >> # CONFIG_DRVR_READAHEAD is not set >> # CONFIG_ARCH_HAVE_SDIO is not set >> # CONFIG_ARCH_HAVE_SDIOWAIT_WRCOMPLETE is not set >> # CONFIG_ARCH_HAVE_SDIO_PREFLIGHT is not set >> # CONFIG_MMCSD is not set >> # CONFIG_MODEM is not set >> # CONFIG_MTD is not set >> # CONFIG_EEPROM is not set >> # CONFIG_EFUSE is not set >> # CONFIG_PIPES is not set >> CONFIG_PM=y >> CONFIG_PM_NDOMAINS=1 >> CONFIG_PM_GOVERNOR_GREEDY=y >> # CONFIG_PM_GOVERNOR_ACTIVITY is not set >> >> # >> # Governor options >> # >> CONFIG_SERIAL_PM_ACTIVITY_DOMAIN=0 >> CONFIG_SERIAL_PM_ACTIVITY_PRIORITY=6 >> >> As a side note, I noticed that the tickless OS interval and freerunning >> timers for the nucleo-l476rg seems to only support TIM channels, and not >> LPTIM. As the TIM channels are not operational during low-power modes, >> will >> I be unable to use the tickless OS interval timer without rewriting the >> code that is done to set up the tickless oneshot timer? >> >> Any support on this would be greatly appreciated, >> >> Jesse Jensen (he, him, his) >> Geotab >> >> Embedded Engineer >> >> Direct >> Toll-free >> >> Visit >> >> +1 (702) 409-1041 >> +1 (800) 397-7102 >> www.geotab.com >> >> Twitter <https://twitter.com/geotab> | Facebook >> <https://www.facebook.com/Geotab> | YouTube >> <https://www.youtube.com/user/MyGeotab> | LinkedIn >> <https://www.linkedin.com/company/geotab/> >> >
