zephyr

History

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	samples: sensor: Add 3-Axis accelerometer polling sample	2022-08-04 09:06:57 -05:00
prj.conf	samples: sensor: Add 3-Axis accelerometer polling sample	2022-08-04 09:06:57 -05:00
README.rst	samples: sensor: Add 3-Axis accelerometer polling sample	2022-08-04 09:06:57 -05:00
sample.yaml	yamllint: fix all yamllint line-length errors	2023-01-04 01:16:45 +09:00

README.rst

.. _accel_polling:

Generic 3-Axis accelerometer polling sample
###########################################

Overview
********

This sample application demonstrates how to use 3-Axis accelerometers.

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

This sample supports up to 10 3-Axis accelerometers. Each accelerometer needs
to be aliased as ``accelN`` where ``N`` goes from ``0`` to ``9``. For example:

.. code-block:: devicetree

  / {
  	aliases {
  			accel0 = &lis2dh;
  		};
  	};

Make sure the aliases are in devicetree, then build and run with:

.. zephyr-app-commands::
   :zephyr-app: samples/sensor/accel_polling
   :board: <board to use>
   :goals: build flash
   :compact:

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

.. code-block:: console

       lis2dh@19 [m/s^2]:    (  -6.013728,   -3.064320,    7.277760)
       lis2dh@19 [m/s^2]:    (  -6.128640,   -3.026016,    7.201152)
       lis2dh@19 [m/s^2]:    (  -6.090336,   -3.064320,    7.162848)
       lis2dh@19 [m/s^2]:    (  -6.128640,   -3.026016,    7.354368)
       lis2dh@19 [m/s^2]:    (  -6.166944,   -3.102624,    7.277760)
       lis2dh@19 [m/s^2]:    (  -6.128640,   -2.987712,    7.277760)
       lis2dh@19 [m/s^2]:    (  -6.052032,   -2.987712,    7.277760)
       lis2dh@19 [m/s^2]:    (  -6.166944,   -2.987712,    7.239456)
       lis2dh@19 [m/s^2]:    (  -6.090336,   -3.026016,    7.201152)