113 lines
3.2 KiB
ReStructuredText
113 lines
3.2 KiB
ReStructuredText
.. _nrf5x-power-mgr-sample:
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nRF5x Power management demo
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###########################
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Overview
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********
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This sample demonstrates a power manager app that uses the Zephyr
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power management infrastructure to enter into Low Power state.
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This app will cycle through the following power schemes each time the system
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enters idle state:
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1. Low Power State: Low Power State could be SoC, board and/or application
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specific. Being in this state is transparent to devices. SOC and devices
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do not lose context in this Mode. This example implements two Low Power
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states, which are signaled using LEDs on the development kit:
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A. LED1: [X], LED2: [X]: System is active, no low power state is selected.
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B. LED1: [X], LED2: [ ]: System is idle, and the SYS_POWER_STATE_SLEEP_2
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state is selected.
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C. LED1: [ ], LED2: [ ]: System is idle, and the SYS_POWER_STATE_SLEEP_3
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state is selected.
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2. Deep Sleep: This Power State is mapped to SYSTEM OFF state. In this mode
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all devices on board get suspended. All devices and SOC lose context on
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wake up.
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The power mode selection is done automatically by residency-based policy
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implemented by the Zephyr Power Management Subsystem.
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Requirements
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************
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This application uses nRF51 DK or nRF52 DK board for the demo.
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Building, Flashing and Running
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******************************
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.. zephyr-app-commands::
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:zephyr-app: samples/boards/nrf52/power_mgr
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:board: nrf52_pca10040
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:goals: build flash
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:compact:
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Running:
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1. Open UART terminal.
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2. Power Cycle Device.
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3. Device will enter into Low Power Modes.
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4. Press Button 1 on device to enter deep sleep state.
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5. Press Button 2 on device to wake up from deep sleep state.
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Sample Output
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=================
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nRF52 core output
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-----------------
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.. code-block:: console
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*** Power Management Demo on nrf52_pca10040 ***
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Demo Description
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Application creates idleness, due to which System Idle Thread is
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scheduled and it enters into various Low Power States.
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<-- App doing busy wait for 10 Sec -->
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<-- App going to sleep for 10 Sec -->
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--> Entering to SYS_POWER_STATE_SLEEP_2 state.
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--> Exited from SYS_POWER_STATE_SLEEP_2 state.
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<-- App doing busy wait for 10 Sec -->
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<-- App going to sleep for 30 Sec -->
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--> Entering to SYS_POWER_STATE_SLEEP_3 state.
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--> Exited from SYS_POWER_STATE_SLEEP_3 state.
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<-- Disabling SYS_POWER_STATE_SLEEP_3 state --->
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<-- App doing busy wait for 10 Sec -->
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<-- App going to sleep for 10 Sec -->
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--> Entering to SYS_POWER_STATE_SLEEP_2 state.
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--> Exited from SYS_POWER_STATE_SLEEP_2 state.
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<-- App doing busy wait for 10 Sec -->
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<-- App going to sleep for 30 Sec -->
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--> Entering to SYS_POWER_STATE_SLEEP_2 state.
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--> Exited from SYS_POWER_STATE_SLEEP_2 state.
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<-- Enabling SYS_POWER_STATE_SLEEP_3 state --->
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<-- Disabling SYS_POWER_STATE_SLEEP_2 state --->
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<-- App doing busy wait for 10 Sec -->
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<-- App going to sleep for 10 Sec -->
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<-- App doing busy wait for 10 Sec -->
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<-- App going to sleep for 30 Sec -->
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--> Entering to SYS_POWER_STATE_SLEEP_3 state.
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--> Exited from SYS_POWER_STATE_SLEEP_3 state.
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<-- Enabling SYS_POWER_STATE_SLEEP_2 state --->
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<-- Forcing SYS_POWER_STATE_SLEEP_3 state --->
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<-- App doing busy wait for 10 Sec -->
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<-- App going to sleep for 10 Sec -->
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