嵌入式接入设备是数字化时代的一大主流产品，嵌入式软件则是数字化产品的核心。简要介绍了中嵌入式操作系统/012345 的引导过程和底层软件的设计，并给出了6+7 设备驱动程序的一个实例。(Embedded access device is a mainstream product in the digital era, and embedded software is the core of digital products. The boot process of embedded operating system /012345 and the design of underlying software are briefly introduced, and an example of 6+7 device driver is given.)