Pro Linux Embedded Systems (Expert's Voice in Linux)
Gene Sally
Language: English
Pages: 430
ISBN: 1430272279
Format: PDF / Kindle (mobi) / ePub
Today, Linux is included with nearly every embedded platform. Embedded developers can take a more modern route and spend more time tuning Linux and taking advantage of open source code to build more robust, feature-rich applications. While Gene Sally does not neglect porting Linux to new hardware, modern embedded hardware is more sophisticated than ever: most systems include the capabilities found on desktop systems. This book is written from the perspective of a user employing technologies and techniques typically reserved for desktop systems.
- Modern guide for developing embedded Linux systems
- Shows you how to work with existing Linux embedded system, while still teaching how to port Linux
- Explains best practices from somebody who has done it before
directory where the program was run. The gmon.out file contains the runtime information for the file, which gprof then uses to produce output using the following command: $(GPROF) bubblesort gmon.out For $(GPROF), substitute the gprof included with the toolchain. The output is something close to the following: 181 CHAPTER 8 ■ CONFIGURING THE APPLICATION DEVELOPMENT ENVIRONMENT Each sample counts as 0.01 seconds. % cumulative self self total time seconds seconds calls ns/call ns/call name
various topics. Etiquette When groups of people regularly get together, rules form to make interaction pleasant for all those involved; this is the notion of etiquette. Etiquette involves thinking about others before yourself and making life easier for them. Now, stop slouching and start using the proper fork for your salad. If you’re new to using mailing lists or newsgroups, here are some basic rules: • No spam: If it’s not related to the mailing list, don’t post it. If you’re asking about C++
you can ask for the state of the environment. The exact method varies per boot loader; however, many boards use U-Boot, and the bdi command shows the following output along with some other information: ethaddr = :02:03:04:f5:d6:07; If you’re new to embedded systems, U-Boot is boot-loader software that runs after the board boots but before the operating system as started. Chapter 7 talks about the role of boot loaders in detail. • If all else fails, you can attach the board to the network, start
interchangeably results in an error at compile time. Using C++ means using the C++ standard library, which is much more extensive than C‘s. C++ has the standard collection of I/O and math routines and adds features like containers and iterators. For all of C++’s advantages, it still has some of the disadvantages of C in that you can have direct control over memory resources and can write programs that leak memory. Although the type checking is substantially better than C’s, you can still use type
and handling files, thread synchronization, lists, and other utilities. This code is rather large—close to 100MB for the Java 1.5 library. You can reduce this when deploying Java by leaving out the locale data and only including the jar 173 CHAPTER 8 ■ CONFIGURING THE APPLICATION DEVELOPMENT ENVIRONMENT files (the equivalent of libraries for a compiled system) necessary to run the program on the target device. Embedding Java: Using GCJ Because Java is a compiled language, why not change the