zephyr

History

Gerard Marull-Paretas a202341958 devices: constify device pointers initialized at compile time Many device pointers are initialized at compile and never changed. This means that the device pointer can be constified (immutable). Automated using: ``` perl -i -pe 's/const struct device \(?!const)(.)= DEVICE/const struct device const $1= DEVICE/g' /.c ``` Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>		2022-08-22 17:08:26 +02:00
..
boards	samples: sensors: Remove label property from devicetree overlays	2022-07-19 08:23:35 -05:00
src	devices: constify device pointers initialized at compile time	2022-08-22 17:08:26 +02:00
CMakeLists.txt
prj.conf	sensors: Remove unnecessary Kconfig setting of sensors	2022-07-25 15:18:56 +02:00
README.rst	samples: sensors: Remove label property from devicetree overlays	2022-07-19 08:23:35 -05:00
sample.yaml

README.rst

.. _stm32_vbat_sensor:

STM32 VBat Sensor
#################

Overview
********

This sample reads the Vbat from the STM32 Internal
Sensor and displays the results.

Building and Running
********************

In order to run this sample, make sure to enable ``stm32_vbat`` node in your
board DT file or with a board overlay in the samples/sensor/stm32_temp_sensor/boards :


.. code-block:: dts

    stm32_vbat: stm32vbat {
        compatible = "st,stm32-vbat";
        io-channels = <&adc1 14>;
        ratio = <3>;
        status = "okay";
    };


Enable the corresponding ADC, with the correct vref value (in mV)

.. code-block:: dts

    &adc1 {
	vref-mv = <3000>;
	status = "okay";
    };


.. zephyr-app-commands::
   :zephyr-app: samples/sensor/stm32_vbat_sensor
   :board: nucleo_g071rb
   :goals: build
   :compact:

Sample Output
=============

.. code-block:: console

Current Vbat voltage: 3.04 V