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USB interface association descriptor

Question asked by qwefwq.qwefqwef on Feb 18, 2014
Latest reply on Feb 18, 2014 by sung.chen_chung
Hello,

I have made a 'two-in-one' device using an USB interface association descriptor: a generic HID, and a streaming audio device. Everything is working as expected, but the device is unstable. When fetching data from both interfaces in a loop, after a while (sometimes seconds, sometimes minutes or hours) it will crash (hard fault).

I have already checked the obvious (NVIC interrupt priorities, disabling all but the essential interrupts). Are there any places where I should add additional mutexes because of the use of USB IAD?

USB firmware library is v3.3.0.

Thanks!

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