CurrentMicroframe

Declaration

virtual kern_return_t CurrentMicroframe(uint64_t *microframeNumber, uint64_t *theTime);

Parameters

• microframeNumber:

  uint64_t pointer to be updated with the current frame number

• theTime:

  If not NULL, this will be updated with the system time assosiated with the returned microframe

Return Value

KERN_SUCCESS is successful see IOReturn.h for error codes.

Discussion

Return the current microframe number of the USB controller

This method will return the current microframe number of the USB controller. This is most useful for scheduling future isochronous requests.