XCore Exchange

We have an existing design based on the XMOS USB Audio 2.0 Dev Kit and currently running a slightly modified version of v3.2 of the reference app. I'm currently trying to update our software to the v6.1.1 codebase.

The new code seems to behave normally when connected to a Windows PC but I'm seeing USB enumeration problems when testing with a Mac Mini. When plugged in the board will either:

(a) Completely fail to enumerate - does not appear in System Profiler
(b) Appears on the USB bus but is not available to select as an output device
(c) Drops back to USB Audio Class 1 mode
or (d) Works normally (rarely)

To rule out a problem with our customised hardware and software, I tried using the precompiled binary on the Dev Kit board and saw the same problem. Could I be doing something wrong or is this a known bug?

Is there a reason why you are using 6.1.1 - 6.5.0 is the latest released version?

(Also, I don't see version 6.1.1 in the change log?)

Sorry that should say v6.1.0.

I've now upgraded to 6.5 and this has solved the problem. I hadn't realised that 6.5 was suitable for the old dev boards, I thought it was just for the new MFA platform.