從結(jié)構(gòu)上來說，實(shí)時(shí)多任務(wù)操作系統(tǒng)包括兩部分，一部分為操作系統(tǒng)內(nèi)核(kernel)，即實(shí)時(shí)執(zhí)行程序(Real Time Executive:RTX)，另一部分是輸入輸出部分(I/O)(注意開發(fā)系統(tǒng)不屬于操作系統(tǒng)的范疇)；嵌入式系統(tǒng)對(duì)I/O的需求通常比較小(無文件系統(tǒng)需求)，因此很多實(shí)時(shí)多任務(wù)操作系統(tǒng)本質(zhì)上就是一個(gè)實(shí)時(shí)執(zhí)行程序，如AMX(Kadak)，VRTX(Microtec)，iRMX(Intel)等(這里的X即:eXecutive)，如果純粹從kernel的角度來考察目前流行的各種實(shí)時(shí)多任務(wù)操作系統(tǒng)的性能，它們的效率差別都不大。
在市面上可以得到一些RTX的源代碼(有用C實(shí)現(xiàn)的，有用匯編實(shí)現(xiàn)的，還有用PL/M語(yǔ)言實(shí)現(xiàn)的)，從internet上也可以蕩一些下來(我介紹一個(gè)站點(diǎn)www.eg3.com，堪稱世界電子工程師資源寶庫(kù))，下面我要介紹的一個(gè)RTX版本(我命名為SRTX:short RTX)，可以說是RTX中的元老級(jí)產(chǎn)品了，來自某研究所，九十年代初他們到美國(guó)考察，從美國(guó)某公司購(gòu)得。五年以前，SRTX在國(guó)內(nèi)有售，許多搞工控的研究所利用SRTX開發(fā)了一些大型或小型的產(chǎn)品,這里介紹的SRTX我作了一些簡(jiǎn)化和改動(dòng).
In a preemptive priority based RTOS, priority inversion
problem is among the major sources of deadline
violations. Priority inheritance protocol is one of the
approaches to reduce priority inversion. Unfortunately,
RTOS like uC/OS can’t support priority inheritance
protocol since it does not allow kernel to have multiple
tasks at the same priority. Although it has different ways
to avoid priority inversion such as priority ceiling
protocol, developers still have some difficulties in
programming real time applications with it. In this paper,
we redesign the uC/OS kernel to provide the ability to
support round robin scheduling and implement priority
inheritance semaphore on the modified kernel. As result,
we port new kernel with priority inheritance semaphore to
evaluation board, and evaluate the execution time of each
of the kernel service as well as verify the operations of
our implementation.
This application report describes the use of Timer_A3 to decode RC5 and SIRC TV IR remote control signals. The decoder described in this report is interrupt-driven and operates a background function using specific features the Timer_A3. Only a small portion of the MSP430 CPU?s nonreal-time resources is used. Specific hardware bit-latching capabilities of the Timer_A3 module are used for real-time decoding of the IR data signal, independent
and asynchronous to the CPU. CPU activity and power consumption are kept to an absolute minimum level. The Timer_A3 decoder implementation also allows other tasks to occur simultaneously if required. The solutions provided are written specifically for MSP430x11x(1) and MSP430x12x derivatives, but can be adapted to any other MSP430 incorporating Timer_A3.
電視遙控器設(shè)計(jì)基於MSP430
celestia源代碼，Celestia, a real-time 3D space simulation featuring a database of over 100000 stars, nearly a hundred solar system, objects, and a complete catalog of extrasolar planets.
《JavaServer Faces》
In JavaServer Faces, developers learn how to use the new JavaServer Faces framework to build real-world web applications. The book contains everything you ll need: how to construct the HTML on the front end how to create the user interface components that connect the front end to your business objects how to write a back-end that s JSF-friendly and how to create the deployment descriptors that tie everything together. This book is a complete guide to the crucial new JSF technology.
Rao-Blackwellised Particle Filters (RBPFs) are a class of Particle
Filters (PFs) that exploit conditional dependencies between
parts of the state to estimate. By doing so, RBPFs can
improve the estimation quality while also reducing the overall
computational load in comparison to original PFs. However,
the computational complexity is still too high for many
real-time applications. In this paper, we propose a modified
RBPF that requires a single Kalman Filter (KF) iteration per
input sample. Comparative experiments show that while good
convergence can still be obtained, computational efficiency is
always drastically increased, making this algorithm an option
to consider for real-time implementations.
Robotics TOOLBOX
The Toolbox provides many functions that are useful in robotics including such things as
kinematics, dynamics, and trajectory generation. The Toolbox is useful for simulation as
well as analyzing results from experiments with real robots.
Have fun with the toolbox. It is self-explanatory and very (robotics) user friendly...see the robot.pdf
《為Windows Vista編寫安全的代碼》，2007年出版
Providing developers with first-hand insights into design decisions and practical advice for solving real-world security issues, this authoritative guide urges developers to write more secure code on the Vista platform to support a growing customer base.
Table of Contents
Writing Secure Code for Windows Vista
Foreword
Introduction
Chapter 1 - Code Quality
Chapter 2 - User Account Control, Tokens, and Integrity Levels
Chapter 3 - Buffer Overrun Defenses
Chapter 4 - Networking Defenses
Chapter 5 - Creating Secure and Resilient
Chapter 6 - Internet Explorer 7 Defenses
Chapter 7 - Cryptographic Enhancements
Chapter 8 - Authentication and Authorization
Chapter 9 - Miscellaneous Defenses and Security-Related Technologies
Index
List of Figures
List of Tables
List of Sidebars
With this foundation, you explore a development model that addresses the complete range of issues in the design of embedded communications software, including real-time operating systems, hardware and software partitioning, layering, and protocol stacks.
matlab 實(shí)現(xiàn)系統(tǒng)的參數(shù)計(jì)算，系統(tǒng)單位階躍響應(yīng)的相關(guān)參數(shù)計(jì)算。Matlab real system parameters, the system unit step response of the relevant parameters.
