Ports and Interfaces > USB

usb interruptions, I think?

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Jan Axelson:
Control transfers have multiple stages. The host can schedule interrupt transfers between the stages or between transactions within a stage where that applies.

ulao:
One more question here. Per the previous discussion, as I mentioned, I have both interrupts and control transfers. In my software I control the 'control' transfers. Though the interrupt transfers happen all the time. By that I mean whenever the OS is up and running. These transfers start the minute I pug in my device. So I'm guessing the HID/game controller driver handles these? More to the point, can I stop/pause this?

Jan Axelson:
The host driver schedules periodic transfer attempts for interrupt IN endpoints. The device endpoint needs to be set up to NAK all IN token packets unless there is data to send.

ulao:
Is there a way to pause or start/stop this from software?

Jan Axelson:
A low-level filter driver might be able, but not application software.

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