osx - Writing to USB HID Device with IOKit IOHIDDeviceSetReportWithCallback -


i trying communicate asynchronously usb hid device using iohidmanager iokit. have no problem registering callback iohiddeviceregisterinputreportcallback , setting reports iohiddevicesetreport. when try , use iohiddevicesetreportwithcallback communicate device it's no go.

error kioreturnunsupported (0xe00002c7).

here link gentleman same issue apple usb mailing list.

http://lists.apple.com/archives/usb/2009/oct/msg00004.html

i didn't want think response above message correct, can confirm that, method not implemented. here part of response apple developer technical support:

looking thru sources iohiddevicesetreportwithcallback calls (*device->deviceinterface)->setreport; in theory should iokit hid driver… looking @ returns kioreturnunsupported…


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