In i2c - bus communication technique , the principle is introduced ; the design of i2c - bus node , the structure of i2c - bus control network and the design of i2c - bus application in fire alarm control system are explained thoroughly 在i ~ 2c总线通信技术中,介绍了i ~ 2c总线工作的基本原理,详细论述了在火灾报警控制系统中基于i ~ 2c总线的节点设计、控制网络的组建以及应用程序的设计。