MacOS - TSN/AVB Not staying selected

Sub forums for various specialist XMOS applications. e.g. USB audio, motor control and robotics.
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MacOS - TSN/AVB Not staying selected

Postby rgilio » Mon Dec 09, 2019 10:33 pm

Hi all,

I'm using the XMOS Multichannel Board ( and am running the TSN/AVB TDM example ( ... .3rc1).pdf).
I've been unsuccessful with getting the example to work out of box. Essentially I'm getting to step 4 in Appendix C and every time I click the checkbox to enable/select the XMOS device, it stays checked for a quarter of a second and then unchecks itself.

I have attempted reflashing the firmware multiple times and have restarted the Mac several times as well. I cannot figure out why it's not staying connected. I'm also not getting any debug output from the XTAG when I run the application as specified in Appendix B of the tdm example doc.

Any help would be appreciated.
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Postby Sebastian » Tue Dec 10, 2019 11:23 am

Hi rgilio,

I'm not familar with xTimecomposer.
But could you try use the cmd line.
The command for running the code is:
xrun --xscope bin/yourapp.xc
--xscope is the flag for displaying the debug informations.

AVB and MacOS is a very confusion matter.
The best experiences I made, was with latest version of HighSierra and Mojave.
On the other side. I use allmost avbutil.
avbutil is a virtual avb soundcard.
For example:
16 Ch In(2xSteam) | 16Ch out(2xStream)

avbutil help
for some instructions

Please post your result.
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Postby rgilio » Tue Dec 10, 2019 9:45 pm

Thanks for the response. I'll give it a shot when I've got a chance and post an update.

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