77 lines
2.3 KiB
ReStructuredText
77 lines
2.3 KiB
ReStructuredText
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.. _audio_app-sample:
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Intel® S1000 2-Way Audio Sample Application
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###########################################
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Overview
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********
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This sample application demonstrates audio capture and playback on an
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Intel® S1000 CRB.
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The application uses the following drivers
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- DMIC driver (For microphone audio capture)
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- I2S driver (For audio input from host,
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audio output to host and audio output to codec)
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- Codec driver
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Intel® S1000 is the master on the I2S interfaces.
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The host is a slave on I2S and is expected to send and receive audio at a
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sampling frequency of 48KHz, 32 bits per sample.
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This sample application captures 8 channels of audio one from each of the
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8 microphones.
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The first 2 channels are buffered and forwarded to the host.
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Simultaneously, 2 channels of audio from the host are buffered and forwarded
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to the codec.
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This bidirectional forwarding of audio demonstrates a 2-way audio stream
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between S1000's microphones/audio line-out and the host.
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After the app starts, one may use the ALSA aplay/arecord commands on
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a Linux host connected to S1000 over the I2S bus to play and record the audio.
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``aplay -f S32_LE -r 48000 -c 2 -D <Device> <WAV file to Play>``
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``arecord -f S32_LE -r 48000 -c 2 -D <Device> <WAV file to Record>``
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Requirements
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************
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This application uses an Intel® S1000 Customer Reference Board (CRB)
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with a circular 8 microphone array board.
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The Microphone array board contains a TI TLV320DAC3101 DAC for line-level
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Audio output.
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Cable Rework
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============
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A rework of the host to CRB cable is required for playing audio from host.
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Pin 12 needs to be wired to Pin 29 on the 40-pin connector of the cable.
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.. image:: ../i2s/cable_rework.png
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:width: 442px
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:alt: Cable rework to play audio from host
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Building and Running
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********************
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.. zephyr-app-commands::
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:zephyr-app: samples/boards/intel_s1000_crb/audio
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:board:
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:goals: build
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:compact:
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Sample Output
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=============
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Console output
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--------------
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.. code-block:: console
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[00:00:00.342,117] <inf> audio_io: Starting Audio Driver thread (0xbe0142c4)
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[00:00:00.342,117] <inf> audio_io: Configuring Host Audio Streams ...
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[00:00:00.342,123] <inf> audio_io: Configuring Peripheral Audio Streams ...
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[00:00:00.343,631] <inf> audio_io: Initializing Audio Core Engine ...
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[00:00:00.343,632] <inf> audio_io: Starting Audio I/O...
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