说明：  国外大学教程。详细介绍了基于KEIL开发环境下的8051单片机的软件开发方法。通俗易懂，书中源码例子经典。强烈推荐
(Tutorial foreign universities. Described in detail based on the KEIL development environment under the 8051 method of software development. Simple, classic example of the book source. Strongly recommend)