一种高速可配置实时总线的开发及其应用

Development of the high speed reconfigurable real-time field-bus and its application

为满足工业生产中对现场总线柔性可重构以及高速实时传输要求,讨论了一种可在线配置高速实时总线的设计与实现.本研究通过对SPI协议的改进,使其适应进行长距离传输的全双工通信,以保证传输速度和实时要求.通过现场可编程门阵列(field programmable gate array,FPGA)技术的应用和报文结构的特殊设计,实现了总线数据报文长度的在线柔性配置和从模块的智能扩展.文中给出的工程应用实例证明了此方法的可行性.

In order to fulfill the flexibility and re-configurability of the high speed real-time field-bus,a design method of a reconfigurable field-bus and its implementation were presented. By the reformed serial peripheral interface (SPI),the ability of full-duplex high speed communication was realized. In addition by using FPGA technology with the well designed message format,the data length of the message and the slave module properties can be configured at runtime. An engineering implementation was also present...