Hello again Jeremy, we have managed to make it work using USBX on ux framework. But we have some questions. Our application contains different threads with different features (touch panel, uart communication...). We have added another thread with the USB feature. We have found that if the USB thread has the same priority as the other threads (the other threads have a priority of 6 at this moment), the USB thread gets stuck in: ux_host_stack_class_instance_get(class, 0, (void **) &storage); with a value of 0x5B: UX_HOST_CLASS_INSTANCE_UNKNOWN But if the USB thread is configured with a priority of 20 (the same as in the example I refered in the original post), everything seems to work fine. Do you have any idea of why this is happening? Thanks, isaenz
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