基于FPGA和ARM-μClinux的LED大屏幕显示器通用脱机控制卡的设计和应用

Design and Application of LED Large Screen Display Universal Offline Control Card Based on FPGA and ARM-μClinux

相对于LED大屏幕显示器视频控制卡,脱机控制卡在软件实现上需要做较多复杂的工作。对不同点阵,不同通讯方式的需求,脱机控制卡软件、硬件以及显示屏控制机软件都有较大的变化。利用μClinux嵌入式ARM系统以及FPGA构成的双控制器,设计出支持多通讯方式,驱动在设计范围内各种点阵LED显示器的通用脱机控制卡,从而使得LED大屏幕脱机显示屏开发周期大大缩短。设计中提出了驱动各种点阵规格的LED显示器的方法,探讨了μClinux嵌入式系统程序的编写、ARM和FPGA实现显示存储器换体控制的方法等内容。

Software realization of LED Large Screen Display Offline Control Card needs much complex work compared with that of video card. Hardware and software of offline control card will change much due to requirements of different dot-matrix or different styles of communication. LED Large Screen Display Universal Offline Control Card by use of μClinux embedded ARM system and FPGA as double controller is designed, which supports many kinds of communication ways and is able to drive all kinds of dot-matrix size LED display in the range of design. Design will reduce product developing cycle of LED Large Screen Displays. Means of driving all kinds of dot-matrix size display by offline control card are given, methods of writing program of μClinux embedded system, realization of body-change-control in display memory by ARM and FPGA etc. are discussed.