光电探测系统通讯控制卡设计

Design of communication control board in photo-electrical detecting systems

为了实现对各个光电探测分系统之间通讯的集成控制,基于PCI总线设计开发了通讯控制卡。首先,介绍了硬件电路的设计,包括各模块组成和现场可编程门阵列(FPGA)电路和PCI9054电路的设计。然后,阐述了PCI本地总线控制器,讨论了围绕PCI9054开发PCI系统硬件的注意事项和软件设计方法,并且介绍了通讯卡的各个功能模块。验证了通讯控制卡的各项指标,结果显示,PCI总线传输率可以达到26.3MByte/s,最小计时为1ms,精度为0.1ms,8路RS-422同时工作时通讯速率为230.4kbit/s。设计开发的通讯控制卡稳定可靠、精度高、抗干扰能力强,已经在多个重要项目中应用。

A kinds of communication control board based on PCI bus is designed for improving the safety and stabilization of a photo-electrical detecting system.Firstly,the hardware design parts including the Field Programmable Gate Array（FPGA） circuit,PCI9054 design and other function modules are introduced and the PCI local bus control and the PCI system designed with the PCI9054 are studied.Then,other function modules used in the photo-electrical detecting system are shown.After finishing the design work,the communication control board is tested.Tested results indicate that the transmission velocity of PCI bus achieves 26.3 MByte/s,the least time unit is 1 ms with the accuracy of ±0.1 ms and the communication rate by eight series RS-422 is 230.4 kbit/s at the same time.The communication control board finished has been used in some important projects and has done well with high safety and stabilization under the complex environment.