基于SEP3203嵌入式微处理器的图形库实现  

Implementation of Graphic Library Based on the Sep3203 Microprocessor

作　　者：王玺[1] 

机构地区：[1]东南大学国家专用集成电路系统工程技术研究中心,南京210096

出　　处：《电子器件》2008年第2期558-563,共6页Chinese Journal of Electron Devices

摘　　要：介绍了基于SEP3203嵌入式微处理器的图形库底层构架和具体实现,并给出了图形上下文GC和VRAM的数据结构与实现方法,叙述了GPC图形库的基本绘图函数以及中英文字符输出的实现原理。为了使应用程序在比实际物理屏幕大的屏幕上绘图,图形库的设计采用了逻辑屏幕的概念;同时也使当前不拥有LCD的后台任务也能实现图形操作。目前该GPC图形库已在ASIXOS系统中得到应用。This paper introduces the basic structure of graphics library, and give the detailed solution to achieve it, which based on the SEP3203 （the embedded processor designed by the National ASIC System Engineering Center） operate system. Besides, this paper describes the structures of GC and VRAM and depicts the elements of drawing basic graphics and outputting of the English/Chinese characters. The conception of logic screen is accepted in the design of graphics library, that will let the application program draw the graphics in the screen which is larger than the actual physical screen, and the graphic functions can also be called by the application program which is in the back platform and the LCD is unavailable to it. At present, the GPC library has been used in the ASIX OS system.

关 键 词：SEP3203 图形库 GC VRAM 

分 类 号：TP368[自动化与计算机技术—计算机系统结构]