说明：  以嵌入式软件的核心——嵌入式实时操作系统为重点，以应用为目的，全面介绍嵌入式系统。它使读者既能对嵌入式系统及开发有一个全景的把握，又能深入理解和使用嵌入式实时操作系统。同时，为了加强理论与实践的结合，还专门为该教材配套了实验系统。实验系统包括嵌入式实时操作系统和集成开发工具，提供了丰富的实验和手册。读者利用pc就可以自己动手搭建嵌人式系统的开发平台，熟悉应用开发，更好地学习和理解嵌入式系统的基础知识。
(With the core of embedded software - embedded real-time operating system as the focus and application as the purpose, this paper introduces the embedded system comprehensively. It enables readers not only to have a panoramic grasp of embedded system and development, but also to deeply understand and use embedded real-time operating system. At the same time, in order to strengthen the combination of theory and practice, the experimental system is specially provided for the textbook. The experimental system includes embedded real-time operating system and integrated development tools, and provides a wealth of experiments and manuals. Using PC, readers can build the development platform of embedded system by themselves, be familiar with application development, and learn and understand the basic knowledge of embedded system better.)