Like many good ideas, the concept for the Cortex-M0 started life as a conversation between
engineers in a bar. A small and growing number of ARM partners were looking for a 32-bit
processor that was small, really small. The concept quickly became a full-blown engineering
project (codenamed “Swift”). In 2009, the Cortex-M0 design was completed, and it quickly
became one of the most successful ARM processor products.
Through the examples in this book, you will find that the Cortex-M0 microcontrollers are easy
to use. In some aspects, they are even easier to use than some 8-bit microcontrollers because of
the simplicity of the linear memory architecture, an uncomplicated and yet flexible exception
model, comprehensive debug features, and the software infrastructures provided by ARM,
microcontroller vendors, and software solution providers.
Because the Cortex-M processors are extremely C friendly, there is no need to optimize the
applications with assembly. There is no need to learn lots of special C directives just to get the
interrupt handlers working. For some embedded developers, the switch to ARM micro-
controllers also means it is much easier to switch between different microcontroller products
without the need to buy new tools and learn a new architecture. On the Internet you can find
that many people are already using Cortex-M0 microcontrollers on a number of interesting
projects.
After working on a number of ARM processor projects, I gained a lot of experience in the use
of the Cortex-M processors (and possibly some gray hairs as well). With encouragement from
some friends and help from lots of people, I decided to put those experiences into a book to
share with numerous embedded developers who are interested in using the ARM Cortex-M
processors. I learned a lot while writing my first book, which is about the Cortex-M3 processor.
Many thanks to those people who gave me useful feedback when the first book was published,
both inside and outside ARM. I know it wasn’t perfect, but at least it is encouraging to find that
many readers found my Cortex-M3 book useful. I hope this book, The Definitive Guide to the
ARM Cortex-M0, will be even better.
This book targets a wide range of audiences: from students, hobbyists, and electronic enthu-
siasts, to professional embedded software developers, researchers, and even semiconductor
product designers. As a result, it covers a wide range of information, including many advanced
technical details that most embedded developers might never need. At the same time, it
contains many examples, making it easy for novice embedded software developers to use.
I hope that you find this book helpful and that you enjoy using the Cortex-M0 in your next
embedded project.
xvi Preface
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stean2018-02-02配合中文版看更好理解，也有益于以后看其他的英文专业资料，感谢分享
