EDMA数据传输方式在基于DSP的视频信号处理系统中的应用  

Data Transfers by EDMA in Video Signal Processing System

作　　者：陈振华[1,2] 邓少芝[1,2] 许宁生[1,2] 

机构地区：[1]中山大学理工学院光电材料与技术国家重点实验室 [2]广东省显示材料与技术重点实验室,广东广州510275

出　　处：《液晶与显示》2007年第6期719-724,共6页Chinese Journal of Liquid Crystals and Displays

基　　金：国家科技部"973"计划项目(No.2003CB314701);国家-广东省联合科学基金项目(No.U0634002)

摘　　要：视频信号传输是视频信号处理系统的关键技术,文章介绍利用EDMA数据传输方式、在基于TI公司的数字信号处理器(DSP)TMS320C6713芯片的视频信号处理系统中实现视频数据信号高速传输的一种方案。介绍了方案中的DSP外部储存器接口与FIFO存储器的硬件接口设计,并着重描述了基于EDMA数据传输方式的实现方法和软件设计流程。利用EDMA在CPU后台高效地实现存储空间的数据搬移,并在EDMA中断服务程序中对视频数据信号进行处理,DSP的中央处理单元就能够专注于信号处理和系统功能控制,从而满足视频信号处理系统的高速实时性要求。Data transmission is the key technology in video signal processing system.This paper describes the application of the enhanced DMA（EDMA）controller in the video signal processing system based on digital signal processors（DSP）TMS320C6713.The interface design between the external memory interface of DSP and FIFO memory was discussed,and the method of data transfers by EDMA and the software design flow in the video signal processing system were described respectively.In the video signal processing system,the video data transfers from FIFO memory to DSP were carried out by EDMA channel in the background,and the video data were processed in EDMA interruption service program.The CPU of DSP focused on signal processing as well as system real time controls,so that the real time requirement of the video signal processing system could be satisfied.

关 键 词：增强直接存储器访问 数字信号处理器 视频信号处理 

分 类 号：TN27[电子电信—物理电子学]