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Re: HID LocationIDs & composite devices -> unique ID?

Subject: Re: HID LocationIDs & composite devices -> unique ID?
From: Barry Twycross <email@hidden>
Date: Tue, 19 Apr 2005 23:09:13 -0700
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At 10:54 PM -0700 4/19/05, Andrew Garber wrote:

I discovered the composite devices (such as the Apple Extended Keyboard on my brother's iMac) show up as 2 separate io_object_t instances WITH THE SAME LOCATION ID. This is a problem for me because my system was based on the assumption that LocationIDs are a unique way of identifying a device. Obviously, I was mistaken.

I'd assume this is because the keyboard has 2 HID interfaces, the main keyboard and the keypad. To differentiate them you could add the interface number into the mix. _______________________________________________ Do not post admin requests to the list. They will be ignored. Usb mailing list (email@hidden) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/usb/email@hidden

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	>HID LocationIDs & composite devices -> unique ID? (From: Andrew Garber <email@hidden>)

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