AVB Debugging

Sub forums for various specialist XMOS applications. e.g. USB audio, motor control and robotics.
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gerrykurz
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AVB Debugging

Postby gerrykurz » Mon May 04, 2015 7:11 pm

I am trying to debug a custom AVB endpoint application and hardware.

The device registers with MAC OSX as a 8 in 2 out device and can be selected as the default audio in or out device on the MAC.

The issue is that no audio is getting to or from the MAC.

I notice that in the source code there is an option for doing sine wave synth

Can someone explain what this does and how to use it?

Also is there a way I can loop back the audio input samples to the audio output directly in the I2S component?
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gerrykurz
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Postby gerrykurz » Tue May 05, 2015 6:27 pm

OK I have enabled the sine wave synth and from what I can tell, it should create a sine wave on audio input channels 3 to 8 (my device has eight inputs).

These should then show up on the MAC, if I am correct.

However, when recording all eight input channels with Audacity, there is nothing on any of the channels.

Should I expect this to work?
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gerrykurz
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Postby gerrykurz » Wed May 06, 2015 3:22 am

Got it working.....it was a MAC OSX problem....the MAC audio driver stopped working...a reboot solved it....
ashiqkodawath
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Postby ashiqkodawath » Thu Nov 05, 2020 2:31 pm

Can you please describe how we can generate sine wave internally on xcore.?
Also is there any option to tell the xcore to generate the sine waves with some predefined sampling rate.?
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akp
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Postby akp » Fri Nov 06, 2020 8:58 pm

it uses a lookup table and numerically controlled oscillator. couldn't be easier.

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