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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Accessing a Serial Port from User Space
To a user space application, a serial port driver is accessed as a standard character device in the /dev directory. This should be familiar territory for anyone who has accessed a serial port on any other UNIX system. Where the I/O Kit approach differs, however, is in how a user space application enumerates the serial ports that are present in a system. For many traditional UNIX applications, the user must specify the full path of the serial port's character file. The approach taken by Mac OS X is to shield users from the /dev directory, and to present available serial ports through a descriptive name. This is where the I/O Kit comes in.
Since a serial port is implemented by an I/O Kit driver, its driver ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.