Sleep/ Deep sleep state

[raghavaggarwal]

Hi , I am facing issue to understand the mode my STM32WB55RG gets into when mbed invokes sleep function .
I am making use of following function to get MCU into sleep :

ThisThread::sleep_for(10000.0);

Can someone enlighten me how mbed configures various modes ? Am I right in assuming mbed makes use of HAL libraries provided by STMicro for various power saving modes?

Basically , I want to know in which mode my controller gets into and how these functions are cascaded?
I want my MCU to be consuming as low current as possible.

Any help and resources will be greatly appreciated.

Thanks in advance.

[star297 (Paul Staron)]

Have a look here:

How to deep sleep?

Trying to demonstrate low power with periodic wakeup on my NUCLEO_L152RE board using Mbed OS 5 After initializing the project with mbed new myproject I dumped the snip below in mail.cpp. Nothing in mbed_app.json. #include "mbed.h" int main() { while(true) ThisThread::sleep_for(10000); } Now I had hoped to measure only a very little current across the IDD breakout on the board. (as I understand it, the IDD is where I should hook in my ammeter) Anyway, I measure 3.8mA which isn’t …

Should give you some ideas.
Most ST’s operate the same way.
More info here too:
https://os.mbed.com/docs/mbed-os/v6.2/apis/power-management-sleep.html