58 lines
1.5 KiB
ReStructuredText
58 lines
1.5 KiB
ReStructuredText
.. _nrf-system-off-sample:
|
|
|
|
nRF5x System Off demo
|
|
#####################
|
|
|
|
Overview
|
|
********
|
|
|
|
This sample can be used for basic power measurement and as an example of
|
|
deep sleep on Nordic platforms. The functional behavior is:
|
|
|
|
* Busy-wait for 2 seconds
|
|
* Sleep for 2 seconds
|
|
* Sleep for a duration that would, by policy, cause the system to power
|
|
off if the deep sleep state was not disabled
|
|
* Turn the system off after enabling wakeup through a button press
|
|
|
|
A power monitor will be able to distinguish among these states.
|
|
|
|
Requirements
|
|
************
|
|
|
|
This application uses nRF51 DK or nRF52 DK board for the demo.
|
|
|
|
Building, Flashing and Running
|
|
******************************
|
|
|
|
.. zephyr-app-commands::
|
|
:zephyr-app: samples/boards/nrf52/system_off
|
|
:board: nrf52dk_nrf52832
|
|
:goals: build flash
|
|
:compact:
|
|
|
|
Running:
|
|
|
|
1. Open UART terminal.
|
|
2. Power Cycle Device.
|
|
3. Device will demonstrate two activity levels which can be measured.
|
|
4. Device will demonstrate long sleep at minimal non-off power.
|
|
5. Device will turn itself off using deep sleep state 1. Press Button 1
|
|
to wake the device and restart the application as if it had been
|
|
powered back on.
|
|
|
|
Sample Output
|
|
=================
|
|
nRF52 core output
|
|
-----------------
|
|
|
|
.. code-block:: console
|
|
|
|
***** Booting Zephyr OS build v2.1.0-rc1-158-gb642e1a96d17 *****
|
|
|
|
nrf52dk_nrf52832 system off demo
|
|
Busy-wait 2 s
|
|
Sleep 2 s
|
|
Sleep 60000 ms (deep sleep minimum)
|
|
Entering system off; press BUTTON1 to restart
|