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zephyr/samples/sensor/max30101
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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 gpio: mcux: Convert convert to DT_INST defines 2020-04-23 17:07:41 -05:00
src devices: constify device pointers initialized at compile time 2022-08-22 17:08:26 +02:00
CMakeLists.txt cmake: increase minimal required version to 3.20.0 2021-08-20 09:47:34 +02:00
prj.conf sensors: Remove unnecessary Kconfig setting of sensors 2022-07-25 15:18:56 +02:00
README.rst doc: fix broken file and zephyr-app refs 2019-10-08 15:42:32 -05:00
sample.yaml samples: sensor: add integration_platforms 2021-04-09 06:50:47 -04:00

README.rst 

.. _max30101:

MAX30101 Heart Rate Sensor
##########################

Overview
********

A sensor application that demonstrates how to poll data from the max30101 heart
rate sensor.

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

This project configures the max30101 sensor on the :ref:`hexiwear_k64` board to
enable the green LED and measure the reflected light with a photodiode. The raw
ADC data prints to the console. Further processing (not included in this
sample) is required to extract a heart rate signal from the light measurement.

.. zephyr-app-commands::
   :zephyr-app: samples/sensor/max30101
   :board: hexiwear_k64
   :goals: build
   :compact:

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

.. code-block:: console

   GREEN=5731
   GREEN=5750
   GREEN=5748
   GREEN=5741
   GREEN=5735
   GREEN=5737
   GREEN=5736
   GREEN=5748

<repeats endlessly>