基于CPLD的嵌入式真彩色液晶显示卡的设计

The design of the embedded true color LCD display card based on CPLD

用可编程逻辑器件CPLD和两片SRAM设计了可用于播放24位真彩色图像的显卡,解决了CPLD和SRAM显示动态图像读写切换困难的问题,使用该显卡可以驱动不同型号和分辨率的液晶屏。一方面详细介绍了该显卡的硬件电路布局,另一方面详细阐述了显卡驱动逻辑设计。通过近一年的测试和评估,系统运行稳定,各种技术指标均达到要求,证明设计方法是切实可行的。

The card using for playing 24-bit true color image was designed by a CPLD and two SRAM in this paper,which solve the problem of read and write switching on CPLD and SRAM dynamic display.This graphics card can drive LCD screen of different models and resolution.On one side,it describes the graphics hardware circuit layout.On the other side,it explains logic design of the graphics drivers.Through nearly one year testing and evaluation,this system is stable,and has reached the requirements of various functional indicators which show that the design method is feasible.