FPGA图像处理系统关键问题研究
关键词 数字图像处理系统 SDRAM控制器 FPGA
毕业设计说明书外文摘要
Title Research on the Key Problem of Image Processing System based on FPGA
Abstract
In recent decades, digital image processing has been rapidly developed and been more popular in both scientific researching and civilian fields. And digital image processing system based on FPGA is gradually becoming the main stream. In that system, a storage module is needed to keep the digital video data generated by the video encoded module and synchronous dynamic random access memory is one of the most popular choices. The project is a SDRAM controller based on FPGA which is designed using the method of Finite State Machine and programmed by Verilog hardware description language. The whole designing process follows the Top_Down design thoughts. The top module connects all the bottom modules that realize the following functions separately, state machine control, SDRAM commands decoding and controlling the data transfer. Through this, the design can accurately control the SDRAM time sequence, allowing users to read (write) data from (to) the specific address of the SDRAM. At the end of the design process, the project was simulated and tested by SignalTap Logic Analysis Tool and successfully transplanted to an existing digital image processing system. The design can be easily transplanted to different digital image processing systems for only few modifications is needed. Therefore, the design has relatively high universality.
Keywords Digital Image Processing System SDRAM controller FPGA
目 次
1 绪论 1
1.1 国内外研究背景 1
1.2 课题研究意义 2
1.3 主要研究内容 3
2 SDRAM时序控制 4
2.1 SDRAM时序分析 4
2.2 SDRAM时序控制方法 9
3 SDRAM控制器的设计 11
3.1 SDRAM控制器核心模块设计 11
3.1.1 有限状态机模块 12
3.1.2 命令解析模块 13
3.1.3 数据通路模块 14
3.2 读写FIFO设计 14
3.3 其余辅助模块设计 16
3.3.1 数据产生模块 16
3.3.2 分频倍频器 16
3.4 模块连接 17
4 SDRAM控制器的仿真与调试 18
4.1 SDRAM控制器功能仿真 18
4.1.1 初始化仿真结果 18
4.1.2 自刷新仿真 20
4.1.3 写数据操作时序仿真 20
4.2 SDRAM控制器下载与调试 20
4.2.1 SDRAM控制器调试结果 20
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