October 2006
Intermediate to advanced
336 pages
9h 13m
English
Content preview from Programming Embedded Systems, 2nd EditionBecome 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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Chapter 12. Embedded Linux Examples
Ty Webb: Don’t be obsessed with your desires, Danny. The Zen philosopher, Basho, once wrote: “A flute with no holes is not a flute...and a doughnut with no hole is a Danish.” He was a funny guy.
—the movie Caddyshack
I n this chapter, we will explore some examples using embedded Linux. The examples in this chapter are similar to (or in some cases the same as) the eCos examples we covered in the previous chapter. The idea here is to get an introduction to embedded Linux and understand some basic operating system functionality.
Introduction
The embedded Linux examples demonstrate certain basic APIs for various operations. Additional APIs exist that offer other functionality. You should research the additional APIs on your own to determine whether there are other, better ways to perform the operations necessary for your particular embedded system.
One aspect of Linux you need to be familiar with is its thread model. The Linux API conforms to the key POSIX standard in the space, POSIX 1003.1c, commonly called the pthreads standard. POSIX leaves many of the implementation details up to the operating system implementer. A good source of information on pthreads is the book Pthreads Programming, by Bradford Nichols, Dick Buttlar, and Jacqueline Farrell (O’Reilly).
The version of embedded Linux used on the Arcom board is a standard kernel tree (version 2.6) with additional ARM and XScale support from the ARM Linux Project at http://www.arm.linux.org.uk.
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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.