51 lines
909 B
ReStructuredText
51 lines
909 B
ReStructuredText
.. _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
|