100Mbit Ethernet AVB endpoint example using I2S master

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  • 100Mbit Ethernet AVB endpoint example using I2S master

    This application note demonstrates an Ethernet AVB endpoint that streams uncompressed audio over an Ethernet AVB network with guaranteed Quality of Service, low latency and time synchronization. It shows how to interface with a high performance audio codec via the I2S library.

    The application is configured to provide a single Talker and Listener stream of 8 audio channels at up to 192kHz sampling rate.

    The example also shows plug-and-play multichannel recording and playback with Apple Mac hardware running OS X 10.10.5

    Required tools and libraries

    The code in this application note is known to work on version 14.1.1 of the xTIMEcomposer tools suite, it may work on other versions.

    The application depends on the following libraries:

    • lib_tsn (>=7.0.0)
    • lib_i2s (>=2.0.1)

    Required hardware

    The application note is designed to run on the following hardware :

    • XMOS xCORE-General purpose SliceKit (XP-SKC-XL216 - 1v1);
    • XMOS Ethernet Slice (XA-SK-E100 - 1V1);
    • XMOS Audio-pll Slice (XA-SK-AUDIO-PLL - 1v0).

    The described hardware setup is used for example purposes only. The firmware can be modified to run on any xCORE-200 series device with the required external hardware.

    The firmware was interoperability tested with a Early 2011 MacBook Pro running OS X version 10.10.5.

    Prerequisites

    • This document assumes familiarity with the XMOS xCORE architecture, the IEEE AVB/TSN standards, the XMOS tool chain and the xC language. Documentation related to these aspects which are not specific to this application note are linked to in the references appendix.
    • For descriptions of XMOS related terms found in this document please see the XMOS Glossary [1].
    • The example uses various libraries, full details of the functionality of a library can be found in its user guide [2].
    [1]

    http://www.xmos.com/published/glossary

    [2]

    http://www.xmos.com/support/libraries