51单片机例程，此为详细的例程，从基础部分到使用部分，让你对单片机不在陌生，让你喜欢上它，对单片机常见的接口技术实现，有电路图和对用的源码。-51 MCU routines, such as detailed routines, from basic to use part of SCM, let you not strange, let you like it, on a single common interface technology, the circuit diagram and s