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Posted to dev@nuttx.apache.org by Disruptive Solutions <di...@gmail.com> on 2019/12/23 22:30:51 UTC

Power Management on the L432KC

A content question (I think this is possible?) .....

I want to use the STANDBY mode in Power Management in the Nucleo-L432KC.
Now I am reading that in the STM32 Power Management is implemented.

What is the best way to get this working for the L432KC? I see that in arch
there are some power routines implemented. The standby register settings
"look" ok.

Say I want to trigger (event when power fails and "line" is pulled down) it
sets the Nucleo in "STANDBY" so my RTC is still "OK". And the coin battery
(CR2032) kicks in...

Then I want it to get back "ALIVE" again when I put a rising edge on WKUP1
(PA0) event...

How could I best tackle this?

Thanks.
Ben

Re: Power Management on the L432KC

Posted by Disruptive Solutions <di...@gmail.com>.
Thank you I will look into it!

Verstuurd vanaf mijn iPhone

> Op 24 dec. 2019 om 00:05 heeft Gregory Nutt <sp...@gmail.com> het volgende geschreven:
> 
> 
>>> I want to use the STANDBY mode in Power Management in the Nucleo-L432KC.
>>> Now I am reading that in the STM32 Power Management is implemented.
>>> 
>>> What is the best way to get this working for the L432KC? I see that in arch
>>> there are some power routines implemented. The standby register settings
>>> "look" ok.
>>> 
>>> Say I want to trigger (event when power fails and "line" is pulled down) it
>>> sets the Nucleo in "STANDBY" so my RTC is still "OK". And the coin battery
>>> (CR2032) kicks in...
>>> 
>>> Then I want it to get back "ALIVE" again when I put a rising edge on WKUP1
>>> (PA0) event...
>>> 
>>> How could I best tackle this?
>> 
>> Use the NuttX PM (Power Management) subsystem.  Search through the boards defconfig files for CONFIG_PM for some very simple examples.  There is no real documentation (only this http://www.nuttx.org/doku.php?id=documentation:pmreport).  More real world usage is more complex.  I don't believe that there is any defconfig for the STM32L4 family so that will be an interesting challenge
> 
> There might be something useful to you in this post: https://groups.google.com/forum/#!searchin/nuttx/power$20management|sort:date/nuttx/1q7jIsrRW5I/wOhaPYDwAAAJ
> 
>

Re: Power Management on the L432KC

Posted by Gregory Nutt <sp...@gmail.com>.
>> I want to use the STANDBY mode in Power Management in the Nucleo-L432KC.
>> Now I am reading that in the STM32 Power Management is implemented.
>>
>> What is the best way to get this working for the L432KC? I see that 
>> in arch
>> there are some power routines implemented. The standby register settings
>> "look" ok.
>>
>> Say I want to trigger (event when power fails and "line" is pulled 
>> down) it
>> sets the Nucleo in "STANDBY" so my RTC is still "OK". And the coin 
>> battery
>> (CR2032) kicks in...
>>
>> Then I want it to get back "ALIVE" again when I put a rising edge on 
>> WKUP1
>> (PA0) event...
>>
>> How could I best tackle this?
>
> Use the NuttX PM (Power Management) subsystem.  Search through the 
> boards defconfig files for CONFIG_PM for some very simple examples.  
> There is no real documentation (only this 
> http://www.nuttx.org/doku.php?id=documentation:pmreport).  More real 
> world usage is more complex.  I don't believe that there is any 
> defconfig for the STM32L4 family so that will be an interesting challenge

There might be something useful to you in this post: 
https://groups.google.com/forum/#!searchin/nuttx/power$20management|sort:date/nuttx/1q7jIsrRW5I/wOhaPYDwAAAJ

Re: Power Management on the L432KC

Posted by Gregory Nutt <sp...@gmail.com>.
> I want to use the STANDBY mode in Power Management in the Nucleo-L432KC.
> Now I am reading that in the STM32 Power Management is implemented.
>
> What is the best way to get this working for the L432KC? I see that in arch
> there are some power routines implemented. The standby register settings
> "look" ok.
>
> Say I want to trigger (event when power fails and "line" is pulled down) it
> sets the Nucleo in "STANDBY" so my RTC is still "OK". And the coin battery
> (CR2032) kicks in...
>
> Then I want it to get back "ALIVE" again when I put a rising edge on WKUP1
> (PA0) event...
>
> How could I best tackle this?

Use the NuttX PM (Power Management) subsystem.  Search through the 
boards defconfig files for CONFIG_PM for some very simple examples.  
There is no real documentation (only this 
http://www.nuttx.org/doku.php?id=documentation:pmreport).  More real 
world usage is more complex.  I don't believe that there is any 
defconfig for the STM32L4 family so that will be an interesting challenge.