VXI总线高速高精度数据采集模块的设计与实现

Design of a high -speed and high -precision data acquisition module based on VXI bus

介绍了一种基于VXI总线C尺寸,高速、高精度数据采集模块的软硬件设计与实现。该模块建立在一种新的模块化VXI仪器平台VVP(VXIVersatilePlug-in)上。中央处理器采用SHARCDSP进行实时数字信号处理,基板使用FPGA实现VXI总线与DSP的桥接,数据以DMA方式传输,时序和逻辑电路由CPLD实现。上位机软件采用了虚拟内存技术,用户程序可以灵活方便地从上位机下载。

This paper presents the hardware and software structures of a C size high-speed and high-precision data acquisition module based on the VXI bus.This system is built on a new VXI Versatile Plug-in instrument platform(VVP),The master board car-ries out the real-time processing of digital signals with the SHARC DSP chips and uses FPGA to realize the communication between VXI bus and DSP chips.And DMA is used in data transferring.All the logic and timing circuits are built with CPLD.With the use of the virtual memory technology in its software,users ' programs can be down-loaded from the computer flexibly and very conveniently.