| .. _stm32-pm-adc-sample: |
| |
| STM32 PM ADC |
| ############ |
| |
| Overview |
| ******** |
| |
| This sample is a minimum application to demonstrate basic power management |
| behavior in a basic ADC set up in low power context. |
| |
| .. _stm32-pm-adc-sample-requirements: |
| |
| Requirements |
| ************ |
| |
| The board should support enabling PM. For a STM32 based target, it means that |
| it should support a clock source alternative to Cortex Systick that can be used |
| in core sleep states, as LPTIM (:dtcompatible:`st,stm32-lptim`). |
| |
| Building and Running |
| ******************** |
| |
| Build and flash as follows, changing ``nucleo_wb55rg`` for your board: |
| |
| .. zephyr-app-commands:: |
| :zephyr-app: samples/boards/stm32/power_mgmt/adc |
| :board: nucleo_wb55rg |
| :goals: build flash |
| :compact: |
| |
| After flashing, the console shows the ADC measurement in the form: |
| ``ADC reading[0]:`` |
| ``- adc@50040000, channel 3: 1158 = 932 mV`` |
| |
| PM configurations |
| ***************** |
| |
| By default, :kconfig:option:`CONFIG_PM_DEVICE` and :kconfig:option:`CONFIG_PM_DEVICE_RUNTIME` are |
| enabled. |
| On STM32WB, we can observe a power consumption of about 25µA with both kconfig |
| enabled, 27.5µA without (each time with :kconfig:option:`CONFIG_PM` enabled). |
