FPGA在飞行仪表字符图形产生器设计中的应用

Application of FPGA in Symbol Generator of Flight Instrument

介绍飞行仪表字符图形产生器的工作原理和实现方法 ,并提出了一种针对飞行仪表显示图形特点的新型帧存结构 ,该帧存结构具有双缓冲和自动消隐等特点。文中讨论了采用大规模可编程逻辑器件 FPGA设计的视频控制器和帧存控制器的方法。最后 ,重点介绍自动消隐帧存的原理和设计方法 ,该方法能大大加快飞行仪表显示画面的生成速度。

The operational principle and the realization method for a symbol generator are introduced. Moreover,a new structure of graphic frame-buffer is presented according to the feature of the graphics displayed on flight instrument. This structure has characteristics of double frame-buffer alternation and automatic vanishing screen. The design method for the video and frame-buffer controller with FPGA is discussed. Finally the principle and the design method for automatic vanishing frame-buffer are detailed. The method can greatly improve the speed of graphic generation of flight instrument.