本文通过对一种源码公开的嵌入式实时操作系统ucos ii的分析，以51系列单片机为例，阐述了在单片机中使用该嵌入式操作系统的优缺点，以及在应用中应当注意的一些问题。-In this paper, the disclosure of a source embedded real-time operating system ucos ii analysis, 51 series microcontroller, for example, described the advantages and disadvantages of the use of the embedded operating system in a single-chip, as well as some of the problems should be noted in the application.