.. _os-power-mgr-sample:
OS Power management demo
###########################
Overview
********
This sample demonstrates OS managed power saving mechanism through the sample
application which will periodically go sleep there by invoking the idle thread
which will call the _sys_soc_suspend() to enter into low power states. The Low
Power state will be selected based on the next timeout event.
Requirements
************
This application uses nrf52 DK board for the demo.
Building, Flashing and Running
******************************
.. zephyr-app-commands::
:zephyr-app: samples/subsys/power/power_mgr
:board: nrf52_pca10040
:goals: build flash
:compact:
Running:
1. Open UART terminal.
2. Power Cycle Device.
3. Device will enter into Low Power Modes periodically.
Sample Output
=================
nrf52 core output
-----------------
.. code-block:: console
***OS Power Management Demo on arm****
Demo Description
Application creates Idleness, Due to which System Idle Thread is
scheduled and it enters into various Low Power States.
<-- App doing busy wait for 10 Sec -->
<-- App going to sleep for 6000 msec -->
Entering Low Power state (0)
Entering Low Power state (0)
Entering Low Power state (0)
Entering Low Power state (0)
<-- App doing busy wait for 10 Sec -->
<-- App going to sleep for 11000 msec -->
Entering Low Power state (1)
Entering Low Power state (1)
Entering Low Power state (1)
Entering Low Power state (1)
<-- App doing busy wait for 10 Sec -->
<-- App going to sleep for 6000 msec -->
Entering Low Power state (0)
Entering Low Power state (0)
Entering Low Power state (0)
Entering Low Power state (0)
<-- App doing busy wait for 10 Sec -->
<-- App going to sleep for 11000 msec -->
Entering Low Power state (1)
Entering Low Power state (1)
Entering Low Power state (1)
Entering Low Power state (1)
OS managed Power Management Test completed
970aef2905