the Embedded Systems Conferences on both U.S. coasts. I also began to consult to
companies. All this gave me additional numerous opportunities to find out firsthand
how engineers actually use the published design techniques in a wide range of
application areas.
What you’re holding in your hands is the second edition of PSiCC. It is the direct result
of the plentiful feedback I’ve received as well as five years of the “massive parallel
testing” and scrutiny that has occurred in the trenches.
What’s New in the Second Edition?
As promised in the first edition of PSiCC, I continued to advance the code and refine
the design techniques. This completely revised second edition incorporates these
advancements as well the numerous lessons learned from readers.
New Code
First of all, this book presents an entirely new version of the software, which is now
called Quantum Platform (QP) and includes the hierarchical event processor (QEP) and
the real-time framework (QF) as well as two new components. QP underwent several
quantum leaps of improvement since the first publication six years ago. The
enhancements introduced since the first edition of PSiCC are too numerous to list here,
but the general areas of improvements include greater efficiency and testability and
better portability across different processors, compilers, and operating systems. The two
new QP components are the lightweight, preemptive, real-time kernel (QK) described
in Chapter 10 and the software-tracing instrumentation (QS) covered in Chapter 11.
Finally, I’m quite excited about the entirely new, ultralight, reduced-feature version of
QP called QP-nano that scales the approach down to the lowest-end 8- and 16-bit
MCUs. I describe QP-nano in Chapter 12.
Open Source and Dual Licensing
In 2004, I decided to release the entire QP code as open source under the terms of the
GNU General Public License (GPL) version 2, as published by the Free Software
Foundation. Independent of the open-source licensing, the QP source code is also
available under the terms of traditional commercial licenses, which expressly supersede
the GPL and are specifically designed for users interested in retaining the proprietary
state-machine.com
xviii Preface
我的内容管理
收起
我的收益 登录查看自己的收益
我的积分
登录查看自己的积分
我的C币
登录后查看C币余额
我的收藏 
我的下载 
下载帮助 
评论0