本资料向掌握基本电路知识和基础C语言编程的单片机初学者。为使读者能迅速上手，本资料并不深入了解单片机内部结构和指令系统，而是从读者较熟悉的高级语言开始使读者掌握单片机C语言编程。-This information microcontroller for beginners to master the basic circuit knowledge and basic C programming language. So that readers can quickly get started,

VB与串行通信编程实例：单片机采用了51单片机，多机通信中采用了利SM2来区分是数据还是地址，效果还可以。其中RS485部分采用了隔离转换电路，采用高速光耦6N137-VB and serial communication programming examples: single-chip microcontroller with a 51, multi-machine communication using Lee SM2 to distinguish the data or address,