In file usb_audio.c, at line 146, you have:
/* Callback to application */
if (audio_obj_ptr->class_specific_callback.callback != NULL)
{
/* notify the app of the send complete */
audio_obj_ptr->class_specific_callback.callback(USB_DEV_EVENT_SEND_COMPLETE, USB_REQ_VAL_INVALID,NULL,0,
audio_obj_ptr->audio_application_callback.arg);
}
Reformatting for readability:
/* Callback to application */
if (audio_obj_ptr->class_specific_callback.callback != NULL)
{
/* notify the app of the send complete */
audio_obj_ptr->class_specific_callback.callback(USB_DEV_EVENT_SEND_COMPLETE,
USB_REQ_VAL_INVALID,
NULL,
0,
audio_obj_ptr->audio_application_callback.arg);
}
I believe this should be:
/* Callback to application */
if (audio_obj_ptr->class_specific_callback.callback != NULL)
{
/* notify the app of the send complete */
audio_obj_ptr->class_specific_callback.callback(USB_DEV_EVENT_SEND_COMPLETE,
USB_REQ_VAL_INVALID,
NULL,
0,
audio_obj_ptr->class_specific_callback.arg);
}
That is, calls to the class_specific_callback should use the class_specific.callback.arg.
