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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。
Aiming at the high-speed acquisition and real-time transmission processing of CCD image data, a method of high-speed acquisition using enhanced parallel port is introduced. The system uses complex programmable logic device CPLD to realize enhanced parallel port control and system timing and logic control. In order to ensure CCD image data High-speed transmission, using FIFO (First In First Out) as an enhanced parallel bus and CCD data stream buffer between the data cache, the coordination transfer rate and the A / D sampling rate of inconsistency, high-speed data transmission systems and computers using VC ++ The system achieves a data transfer rate of 500 kB / s through the experimental results. The system has the advantages of simple structure, stable and reliable performance, strong real-time, small size and low power consumption.