zephyr

History

Zak Portnoy 5cbc16ac2c boards: Update Xiao_BLE Sense DTS for pdm microphone Create regulator on GPIO for microphone supply Set pdm data and clk pins in pinctrl Add xiao_ble_sense overlay for dmic sample support Signed-off-by: Zak Portnoy <zakportnoy@gmail.com>		2024-03-28 16:00:12 -05:00
..
boards	boards: Update Xiao_BLE Sense DTS for pdm microphone	2024-03-28 16:00:12 -05:00
src	kernel: Modify the signature of k_mem_slab_free()	2023-09-03 18:20:59 -04:00
CMakeLists.txt	cmake: Update cmake_minimum_required to 3.20.0	2022-07-04 10:18:45 +02:00
prj.conf	samples: drivers: Add simple application showing how to use DMIC API	2021-09-03 09:34:06 -04:00
README.rst	hwmv2: Introduce Hardware model version 2 and convert devices	2024-03-02 16:56:33 -05:00
sample.yaml	hwmv2: Introduce Hardware model version 2 and convert devices	2024-03-02 16:56:33 -05:00

README.rst

.. zephyr:code-sample:: dmic
   :name: Digital Microphone (DMIC)
   :relevant-api: audio_dmic_interface

   Perform PDM transfers using different configurations.

Overview
********

This is a very simple application intended to show how to use the :ref:`Audio DMIC
API <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: