本书以作者亲自在PC上开发嵌入式操作系统“HelloChina”的全过程为主线，详细地叙述自己动手写嵌入式操作系统所需的各方面知识，如加载和初始化、Shell、线程的实现、内存管理机制、互斥和同步机制及中断和定时机制的实现，以及设备驱动程序管理框架，应用编程接口等。(The whole process of the book by the author personally developed embedded operating system "HelloChina" in the PC as the main line, described in detail to write their own embedded operating system for all aspects of knowledge, such as loading and initialization, Shell, implementation of threads, memory management mechanism, mutex and synchronization mechanism and interrupt and timing mechanism implementation and the device driver management framework, application programming interface)