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High-speed and large-scale data acquisition module based on VXI bus
Author(s): 
Pages: 71-74
Year: Issue:  5
Journal: ELECTRONIC MEASUREMENT TECHNOLOGY

Keyword:  VXI总线SDRAMVHDL状态机Labwindows/CVI;
Abstract: 本文根据某舰空导弹自动测试系统的要求,设计了基于VXI总线的4通道高速数据采集模块.它以SDRAM为数据缓冲单元,用FPGA实现控制和与VXI总线的接口.控制程序采用自顶向下的模块化设计方法,用VHDL实现电路行为的描述.采用状态机(FSM)控制整个流程,实现了各路控制信号的可靠同步.针对SDRAM控制复杂的特点,设计了基于FPGA的SDRAM控制器.驱动程序和应用程序用LabWindows/CVI编写.测试结果表明,模块的采样频率可达200 MHz,有效位数为7.76位,达到了预期的指标.
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