rs485总线网络程序，含节点和主控机电路原理图-rs485 bus network program, with nodes and the host computer circuit diagram

首先介绍I2C总线的的一些基本知识：特点、结构、原理、控制时序、与单片机的接口方法等。最后通过一个实例实现模拟I2C接口。-First of all I2C bus introduce some basic knowledge of: characteristics, structure, principle, control timing, and MCU interface methods. Finally, through an example of analog implementati

该程序是经过精心思考，艰苦调试，得到的关于AVR单片机TWI总线的程序，本例为访问PCF8563为例，中断程序坚实可靠，以此献给大家，渴望参加程序员联盟。-The program was carefully thought, hard to debug, get on the AVR microcontroller TWI bus program, in this case as an example to access PCF8563 interrupt program a solid and