The documentation for IOHIDDeviceCopyValueMultiple says " You’ll need to use IOHIDDeviceGetValue if you're querying input elements. IOHIDDeviceCopyValueMultiple will only with with feature/output elements. > This email sent to not post admin requests to the list. > Usb mailing list Help/Unsubscribe/Update your Subscription: > Do not post admin requests to the list. > IOHIDDeviceCopyValueMultiple, but that doesn't clear things up. > is being returned by a call to IOHIDTransactionCommit internal to > I downloaded some IOKit source code and found that the kIOReturnError error > supposed to be more efficient if you want to get a bunch of values at once. > IOHIDDeviceGetValue successfully, but IOHIDDeviceCopyValueMultiple is > IOHIDDeviceCopyValueMultiple always returns kIOReturnError. > Another problem I'm having with the HID functions is that > On Dec 1, 2017, at 5:43 PM, James Walker wrote: > IOHIDTransactionCreate has a "direction" parameter. > Also, transactions don't seem to work for me either, and > that imply that it should work for input elements? > synchronously and return back immediately for input type element." Doesn't > The documentation for IOHIDDeviceCopyValueMultiple says " This method behaves > You’ll need to use IOHIDDeviceGetValue if you're querying input elements. > IOHIDDeviceCopyValueMultiple will only with with feature/output elements. > On Dec 6, 2017, at 5:30 PM, James Walker wrote: SetReport on the device, while input transactions will issue a getReport on the Recommend checking out the header file for IOHIDTransaction.h, it has more The documentation for IOHIDDeviceCopyValueMultiple is incorrect. This email sent to IOHIDDeviceCopyValueMultiple not working Eng ResearchMac Software Developer Montréal, Québec, Canadaĭo not post admin requests to the list. Suspect it was new in 10.8.2 (not 10.7.3) based on a comment later in the I figure the comments for kIOUSBInterfaceInterfaceID550 must be wrong. This version of IOUSBFamily shipped with Mac OS X version "The kIOUSBInterfaceInterfaceID550 is returned only by version 5.5.0 or above "The IOUSBInterfaceInterface500 is returned only by version 5.0.0 or above of I'm trying to sort out some confusing comments that may be copy-paste errors in Is there a table that lists the IOUSBFamily version of each version of Mac OS?
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