Hi,
I have a HID device and want to communicate with it on Mac OS X.
This HID device has four ElementCookies, two for input and two for output.
I can get IOHIDDeviceInterface object and create a input queue by
allocQueue(), allocQueue() returns a valid IOHIDQueueInterface. It's good.
But for output, I use allocOutputTransaction(), this function always
returns invalid IOHIDOutputTransactionInterface(NULL).
I did something wrong? Or is there another way to ouput data?
Any advice is welcome. Thanks!
Regards,
Eddie
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