单总线技术及器件DS1821的应用

单总线技术采用一根信号线实现数据的双向传输,且能连接多个设备,具有节省I/O口线资源、电路结构简单等众多优点,广泛应用于低速的微机测控领域。首先介绍了单总线器件的结构和数据传输协议,并详细介绍了单总线器件DS1821的功能及控制协议,最后根据实际工程应用给出数据传输协议的程序。

1-wire bus technology use one signal wire to realize two direction data transmission and all the connected devices can share the cable.The advantages such as saving I/O resource,simple circle etc make it apply abroad to computer measure and control domain.This paper introduces the construction and data transmit protocol of 1-wire bus followed by introduction of the function and control protocol of DS1821.Programs of a practical application were given in the end.