基于图像处理系统实时性和大数据量冲突的问题, 提出了在图像处理系统中使用双口RAM的方法。介绍了双口RAM的功能和特点, 以IDT70V09芯片为例给出了图像处理系统中应用双口RAM的系统架构设计、硬件接口设计、系统软件设计以及FPGA和DSP对双口RAM操作软件的详细设计, 并针对双口RAM的端口争用问题与解决方法进行了详细讨论, 对系统的印制板设计和电路调试提出了建议。最后对图像处理系统进了功能测试, 证明了采用双口RAM设计的系统的稳定性和可行性。

According to the problem between real-time image processing and mass data, dual-port random access memory (RAM) used in image processing system is presented. The functions and characteristics of dual-port RAM are introduced. Taking IDT70V09 chip as an example, system structure, hardware interface, system software design of dual-port RAM used in image processing system and the detailed design of dual-port RAM operation software of field-programmable gate array (FPGA) and data signal processor (DSP) are given. And the port contention problem of dual-port RAM and the solutions are discussed in detail. The suggestions about printed circuit board design and circuit debugging of the system are proposed. Finally, function test of the image processing system is performed to prove the stability and feasibility of the system adopting dual-port RAM design.