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Keith Packard 0b90fd5adf samples, tests, boards: Switch main return type from void to int As both C and C++ standards require applications running under an OS to return 'int', adapt that for Zephyr to align with those standard. This also eliminates errors when building with clang when not using -ffreestanding, and reduces the need for compiler flags to silence warnings for both clang and gcc. Most of these changes were automated using coccinelle with the following script: @@ @@ - void + int main(...) { ... - return; + return 0; ... } Approximately 40 files had to be edited by hand as coccinelle was unable to fix them. Signed-off-by: Keith Packard <keithp@keithp.com>		2023-04-14 07:49:41 +09:00
..
src	samples, tests, boards: Switch main return type from void to int	2023-04-14 07:49:41 +09:00
CMakeLists.txt	…
README.rst	…
app.overlay	samples: shields: lmp90100_evb: Fix nodelabel	2022-10-03 14:15:08 +02:00
prj.conf	…
sample.yaml	…

README.rst

.. _lmp90100_evb_rtd_sample:

LMP90100 Sensor AFE Evaluation Board: RTD Sample
################################################

Overview
********

This sample is provided as an example of how to read the temperature
of a Resistance Temperature Detector (RTD) sensor using the LMP90100
Sensor AFE Evaluation Board shield. The sample is designed for use
with a 3-wire PT100 sensor.

Please refer to :ref:`lmp90100_evb_shield` for more information on
this shield.

Requirements
************

Prior to running the sample application, the LMP90100 EVB must be
connected to the development board according to Example #3 ("3-wire
RTD Application") in the `LMP90100 Sensor AFE Evaluation Board User's
Guide`_.

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

This sample runs with the LMP90100 EVB connected to any development
board with a matching Arduino connector. For this example, we use a
:ref:`frdm_k64f` board.

.. zephyr-app-commands::
   :zephyr-app: samples/shields/lmp90100_evb/rtd
   :board: frdm_k64f
   :goals: build
   :compact:

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

 .. code-block:: console

    R: 111.15 ohm
    T: 28.66 degC
    R: 111.14 ohm
    T: 28.64 degC
    R: 111.14 ohm
    T: 28.63 degC
    R: 111.13 ohm
    T: 28.61 degC

.. _LMP90100 Sensor AFE Evaluation Board User's Guide:
   http://www.ti.com/lit/pdf/snau028