基于增强型并口的CCD图像数据高速采集系统  

High-speed Acquisition System of CCD Image Based on Enhanced Parallel Port

作　　者：魏仲慧[1] 张贵祥[1] 张贵祥[2] 何昕 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春 130033 [2]中国科学院研究生院,北京 100039

出　　处：《计算机测量与控制》2008年第2期276-278,281,共4页Computer Measurement &Control

摘　　要：针对CCD图像数据高速采集和实时传输处理,介绍一种利用增强型并口进行高速采集的方法;系统采用复杂可编程逻辑器件CPLD实现增强型并口的控制和系统时序与逻辑控制,为了保证CCD图像数据高速传输,采用FIFO(First In First Out)作为增强型并口总线和CCD数据流之间的缓存区进行数据缓存,协调传输速率与A/D采样速率的不一致,系统与计算机的高速数据传输采用VC++编程实现;通过实验结果得出系统数据传输速率达500 kB/s;该系统具有结构简单、性能稳定可靠、实时性强、体积小、功耗低等优点。A method of high-speed acquisition is introduced by using EPP（ enhanced parallel port） aimed at the data gathering of a CCD image. The system adopts CPLD（ complicated programmable logic device） to realize the systematic timing and logic control of EPP.In order to guarantee the high-speed transmission of CCD image data, using FIFO （ First in First Out） to carry on the buffer memory of the data. The high-speed data transmission from the system to computer is realized by Visual C ＋ ＋. The experimental result shows that the systematic transfer rate of data reaches 500kB/s. This system has advantages of simpie structure, reliable and steady function, strong real-time, small volume and low consumption.

关 键 词：增强型并口 CPLD 数据采集 FIFO 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]