Two channal high speed data acqusition system 双通道高速数据采集系统的设计
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Addas airborne digital data acqusition system 机载数字数据采集系统
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In the dissertation ， we discribe the implementation of large capability video data acquisition system based on pci bus of computer 。 the system is composed of data acquisiton card and corresponding software 。 the data acquisiton card include two acquisition channels ， 8 - bit digitization at rates up to 13 . 5mhz 。 frist ， the architecture of the video data acqusition system is studied 。 then ， the function and implementation methode of each module are introduced in detail 。 the control module of the video data acqusition card is implemented by using of the isp technology of cpld and vhdl programming technology 。 the a / d converter used assembler to implement the initialazation programe 。 and the double buffer technology is used for large capability data acqusition . because a contiously large memory is difficult to apply in windows operating system 。 finally we use broland c + + to introduced the devleoping procedure of drivers 。 在实际的研制过程中，利用cpld的在系统可编程（ isp ）技术和基于vhdl语言的可编程逻辑器件设计技术实现了视频数据采集卡的控制模块。在视频的a / d转换模块，用汇编程序模拟i2c总线对初始化a / d转换芯片。针对大容量数据采集，采用了双缓冲技术解决wndows操作系统下难以申请到大容童连续内存的间题。
