December 2011
Intermediate to advanced
485 pages
15h 47m
English
Content preview from OS X and iOS Kernel ProgrammingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The IOUSBDeviceInterface Class
The IOUSBDeviceInterface class is a user-space class that provides equivalent functionality to the IOUSBDevice class used by kernel drivers. It's worth noting that although the user client class provides similar functionality to its kernel counterpart, it implements it through a different set of methods. Therefore, a kernel USB driver written to work with the IOUSBDevice class cannot simply be brought into a user-space USB driver.
After obtaining a reference to the user-space IOUSBDeviceInterface, the first thing an application will need to do is to configure the USB hardware. The steps an application will take to do this will closely match those explained in Chapter 8 for a kernel driver. First, the application ...
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