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

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。

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

Sof tw are realization of LED Larg e Screen Display Of fline Cont rol Card needs much complex w ork compar ed w ith that of video car d. Hardw are and so ftw are of off line co nt rol car d w ill change much due to requir ement s o f different dot-mat rix or differ ent sty les of communicat ion. LED Larg e Screen Display Universal Of fline Cont rol Card by use of LClinux embedded ARM system and FPGA as double contr oller is desig ned, w hich suppo rt s many kinds of communicat io n way s and is able to drive all kinds of dot- matr ix size LED display in the r ang e of desig n. Desig n w ill reduce product developing cycle of LED Larg e Screen Displays. Means of driving all kinds of dot-mat rix size display by of f line cont rol card are given, methods of w rit ing pro gram of LClinux embedded system, realizat io n of body-chang e-cont rol in display memory by ARM and FPGA etc. are discussed.