Download Building Embedded Linux Systems (2nd Edition) by Karim Yaghmour PDF

By Karim Yaghmour

Karim Yaghmour, Jon Masters, "Building Embedded Linux structures, 2d Edition"
2008 | ISBN: 0596529686 | writer: O’Reilly Media | MOBI | 462 pages | five + four MB

There's loads of pleasure surrounding using Linux in embedded structures -- for every thing from mobile phones to automobile ABS platforms and water-filtration crops -- yet no longer loads of useful info. development Embedded Linux platforms bargains an in-depth, hard-core advisor to assembling embedded platforms according to Linux.

Updated for the newest model of the Linux kernel, this new version provides the fundamentals of creating embedded Linux structures, besides the configuration, setup, and use of greater than forty diversified open resource and loose software program programs in universal use. The publication additionally appears to be like on the strengths and weaknesses of utilizing Linux in an embedded method, plus a dialogue of licensing matters, and an advent to real-time, with a dialogue of real-time strategies for Linux.

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This might sound kind of weird, at first, but it does make things like input and output very easy. Need a number entered at the keyboard? You can just read what was typed and then use it as a string. There’s no need to use special functions or procedures to convert everything back and forth. Perl does it for you. Perl will even attempt to do the right thing with seemingly nonsensical statements such as “foo” + 5 or “23skidoo” + 5. In the former, a string without any numbers (“foo”) will convert to 0, so “foo” + 5 evaluates to 5.

2. /usr/local/bin/perl -w # echo the input to the output print ‘Echo? ‘; $input = ; print $input; You don’t have to understand all of this script right now; I’ll explain all the details tomorrow on Day 2. But you should feel comfortable typing and running this script, and have a general idea of how it works. Here’s a quick run-through of the code: Lines 1 and 2 are both comments: The first for the shebang line, the second to explain what the script does. 19 1 20 Day 1 Line 4 prompts you to type something.

However, text strings typically contain only low ASCII characters (regular characters, no accents, or special characters). Strings also have no size limits; they can contain any amount of data, limited only by the amount of memory in your machine. Although reading the complete works of Shakespeare or a ten-megabyte Unix kernel into a single Perl string might take a while and eat up a whole lot of memory, you could certainly do it. There are two differences between using single quotes and double quotes for strings.

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