从51单片机到arm的入门教程，以及简单的流水灯测试实验的代码，对于初学者比较有帮助-51 microcontroller arm introductory tutorial, as well as the simple code of the light water testing laboratories, more help for beginners

流水灯，基于单片机汇编语言的流水灯的整个过程-Water lights, microcontroller-based assembly language of the whole process of water lights