Mailing Lists: Apple Mailing Lists
Image of Mac OS face in stamp
 
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: matching against composite/HID device

At 10:17 AM -0800 3/18/05, Rhoads Hollowell wrote:

Actually, making a device with a single interface a composite device is a very good idea, 

It also makes it comply with the spec.

The defined class codes <http://www.usb.org/developers/defined_class> specify most class codes for interfaces only. There are very few class codes which are defined for the device to use.

I'm pretty sure that the HID spec specifically stats that a HID device should have device class == 0, and the HID is specified by the interfaces.

On a practical note, using a single interface in a composite device means that there is no difference in the handling of single and multiple interface devices, which means its less likely to go wrong. Single interface composite devices probably make up 95% of the extant USB devices.
--
Barry Twycross
email@hidden
---
USB, it's not a Dyslexic BUS. (Thanks to TC.)
_______________________________________________
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

This email sent to email@hidden
References: 
 >matching against composite/HID device (From: Shaun Wexler <email@hidden>)
 >Re: matching against composite/HID device (From: Fernando Urbina <email@hidden>)
 >Re: matching against composite/HID device (From: Shaun Wexler <email@hidden>)
 >Re: matching against composite/HID device (From: Andy Peters <email@hidden>)
 >Re: matching against composite/HID device (From: Rhoads Hollowell <email@hidden>)



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2007 Apple Inc. All rights reserved.