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
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boards
src	samples, tests, boards: Switch main return type from void to int	2023-04-14 07:49:41 +09:00
CMakeLists.txt	cmake: Update cmake_minimum_required to 3.20.0	2022-07-04 10:18:45 +02:00
prj.conf
README.rst
sample.yaml	samples: Replace dmic tag with lower case	2023-01-10 18:29:35 -05:00

README.rst

.. _dmic_sample:

DMIC Sample
###########

Overview
********

This is a very simple application intended to show how to use the Audio DMIC
API and also to be an aid in developing drivers to implement this API.
It performs two PDM transfers with different configurations (using one channel
and two channels) but does not in any way process the received audio data.

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

The device to be used by the sample is specified by defining a devicetree node
label named ``dmic_dev``.
The sample has been tested on :ref:`nrf52840dk_nrf52840` (nrf52840dk_nrf52840)
and :ref:`nrf5340dk_nrf5340` (nrf5340dk_nrf5340_cpuapp), and provides overlay
files for both of these boards.

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

The code can be found in :zephyr_file:`samples/drivers/audio/dmic`.

To build and flash the application:

.. zephyr-app-commands::
   :zephyr-app: samples/drivers/audio/dmic
   :board: nrf52840dk_nrf52840
   :goals: build flash
   :compact: