| .. _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 |
| |