基于PCI总线的四通道CAN通讯卡的设计  

Design and application of four channel CAN communication card based on PCI bus

作　　者：王海霞[1] 

机构地区：[1]天津外国语大学国际传媒学院,天津300270

出　　处：《电子设计工程》2015年第14期186-189,共4页Electronic Design Engineering

摘　　要：为了完成核电现场I/O模块和控制站之间的数据传输,设计了一种基于PCI总线的四通道CAN通讯卡,每个CAN通道连接32个单通道I/O模块,每隔25 ms采集I/O模块的数据一次,该系统的数据采集总量为400个模拟量和112个开关量。本设计采用两个CPU,使每个中断服务时间占用中断间隔的百分比提高了19%。本文重点阐述了具体的硬件电路设计,包括原理设计、芯片选型、PCB制作等,具有高速度和低成本的优点。In order to complete the data transmission between nuclear power site I/O modules and control station, designing a four channel CAN communication card based on PCI bus, each CAN channel connect 32 single channel I/O module, acquisition the data of I/O module every 25 seconds, and the total data acquisition of this system is 400 analog and 112 switch quantity.This design use two CPU, making the percentage of taking up interrupt interval in each interrupt service increasing by 19%.This paper focusing on hardware circuit＇s design in detail, including principle design, chip selection and PCB design, with the advantages of high speed and low cost.

关 键 词：PCI总线 数据采集 CAN通讯 双口RAM 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]