说明：  基于ARM的嵌入式系统，涉及到软件设计的启动代码、实时操作系统、链接定位和调试技术，很实用，希望对大家有所帮助。
(ARM-based embedded systems, software design involves the start-up code, real-time operating system, links, positioning and technique, it is useful, we hope to be helpful.)