基于USB的DMA方式实现CCD高速数据采集  

Implementation of CCD High-Speed Data Acquisition by USB-Based DMA

作　　者：宋宇[1] 周文远[1] 陈磊[1] 叶青[1] 田建国[1] 

机构地区：[1]南开大学物理科学学院光子学中心,天津300071

出　　处：《光电子．激光》2004年第10期1181-1185,共5页Journal of Optoelectronics·Laser

基　　金：天津市科技攻关培育项目(033104311);国家自然科学基金资助项目(60025512)

摘　　要：提出一种CCD用于通用串行总线(USB)高速数据采集系统设计的新方法。通过对USB及其DMA传输方式分析,采用无外部缓冲区的结构实现数据的高速传输,具有精度高、结构简单、方便易行等优点。详细描述了硬件、固件、驱动程序及应用程序的设计情况。实验证明,该系统可实现CCD的高速高精度数值量化及数据传输。Based on USB-specification, a new design method for CCD high-speed data acquisition system is proposed. Through the analysis of USB-based DMA, a structure without external buffer is adopted to obtain high-speed data transfer. It has some advantages such as high precision and simple structure. The design of hardware, firmware, device driver, and application program are described in detail. The experimental results show that the scheme can realize high-speed and high-resolution CCD signal quantization and data transfer.

关 键 词：USB DMA方式 高速数据采集系统 应用程序 通用串行总线 驱动程序 CCD 高速传输 高速高精 DMA传输 

分 类 号：TN948.41[电子电信—信号与信息处理] TP336[电子电信—信息与通信工程]