VGA汉字显示的FPGA设计与实现  

FPGA design and implementation of VGA character displaying

作　　者：王亮[1] 李正[1] 宁婷婷[1] 刘瑾[1] 陈金强[1] 关永[1] 

机构地区：[1]首都师范大学信息工程学院,北京100037

出　　处：《计算机工程与设计》2009年第2期275-277,281,共4页Computer Engineering and Design

基　　金：北京市自然基金项目(4062009);北京市教委重点基金项目(KZ200710028014)

摘　　要：VGA是显示器接口的一种工业标准。以往大多采用通用处理器控制VGA接口来实现汉字及其它信息的显示,但是以通用处理器为核心的体系结构不易修改,体积偏大,不适合小型便携式设备的设计。由于FPGA具有可重构、体积小等优势,采用FPGA来控制VGA的汉字显示。依据VGA的显示原理,提出了一种基于XilinxSpartan-3的彩条信号显示方法,并利用FPGA内部的块RAM,实现了VGA的汉字显示。实验结果表明,由FPGA来控制汉字的显示,达到了预期的效果,克服了通用处理器的弊端。VGA is a standard industrial display interface. General purpose processor is usually used to control VGA interface to display characters and other information during the past. But the architecture of general purpose processor is difficult to modify, also it is comparatively big, so general purpose processor is not suitable for designing small devices. Instead, FPGA could be reconfigured, and also usually very small, so we choose to use FPGA to control VGA for characters display. According to the principle of VGA display, a method of colored strip signals based on Xilinx Spartan-3 is proposed, meanwhile, block RAM inside the FPGA is used to store the information of the characters for display. We obtain a result as we predicted, get over the shortcomings of general purpose processor.

关 键 词：显示绘图阵列 现场可编程门阵列 块RAM 彩条 汉字 

分 类 号：TP332.3[自动化与计算机技术—计算机系统结构] TN402[自动化与计算机技术—计算机科学与技术]