Download Real-Time Embedded Systems: Design Principles and by Xiaocong Fan PDF

By Xiaocong Fan

ISBN-10: 0128015071

ISBN-13: 9780128015070

This publication integrates new principles and issues from actual time platforms, embedded structures, and software program engineering to offer an entire photo of the entire technique of constructing software program for real-time embedded purposes. you won't purely achieve an intensive realizing of options with regards to microprocessors, interrupts, and process boot technique, appreciating the significance of real-time modeling and scheduling, yet additionally, you will study software program engineering practices equivalent to version documentation, version research, layout styles, and conventional conformance.

This booklet is divided into 4 components that can assist you research the foremost thought of embedded platforms; half one introduces the advance method, and contains chapters on microprocessors and interrupts---fundamental issues for software program engineers; half is devoted to modeling recommendations for real-time platforms; half 3 seems to be on the layout of software program architectures and half 4 covers software program implementations, with a spotlight on POSIX-compliant working systems.

With this e-book you'll learn:

  • The professionals and cons of alternative architectures for embedded structures
  • POSIX real-time extensions, and the way to advance POSIX-compliant genuine time functions
  • How to take advantage of real-time UML to rfile process designs with timing constraints
  • The demanding situations and ideas on the topic of cross-development
  • Multitasking layout and inter-task communique thoughts (shared reminiscence items, message queues, pipes, signals)
  • How to take advantage of kernel items (e.g. Semaphores, Mutex, variables) to deal with source sharing concerns in RTOS purposes
  • The philosophy underpinning the idea of "resource supervisor" and the way to enforce a digital dossier approach utilizing a source supervisor
  • The key ideas of real-time scheduling and a number of other key algorithms
  • Coverage of the newest UML average (UML 2.4)
  • Over 20 layout styles which symbolize the easiest practices for reuse in quite a lot of real-time embedded systems
  • Example codes that have been established in QNX---a real-time working process extensively followed in industry

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While a linker is processing the application-specific object files, it needs to analyze each object file and determine where symbols with external linkage are defined. so, or sharable object files). It is worth noting that two variables of the same name can be defined in different scopes. c. This will not confuse the linker because the compiler has treated them as distinct symbols. Essentially the compiler uses “namespace” to distinguish variables: a local variable name is tagged by the function to which it belongs and a global variable name is tagged by the file name.

When accessing backing memory, it acts like a von Neumann architecture (where code can be moved around like data). As far as the instruction set is concerned, a microprocessor may be one of two types: a complex instruction set computing (CISC) processor or an RISC processor. A CISC processor has multiple addressing modes and runs “complex instructions” where a single instruction may execute several low-level operations (such as a load from memory, an arithmetic operation, and a memory store). While this leads to high code density, it often requires manual optimization of assembly code for embedded systems.

There are two instructions that allow a processor to move bytes between the program memory space and the data RAM: (a) table read TBLRD, which retrieves data from program memory (or data EEPROM6 ) and places it into the data RAM space, and 4 5 6 The configuration bits can be programmed (set to “0”) to select various device configurations. These bits are mapped to the configuration memory space, starting from 300000h through 3FFFFFh, which is beyond the user program memory space (2 MB: 000000h to 1FFFFFh), and can be accessed using only table reads and table writes.

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