Intelligent LCD Terminal System Design Based On NiosⅡ

Liquid crystal display (LCD) is widely used in industrial control and consumer electronic fields because of its incomparable advantages such as low power consumption, small volume, and light weight etc, which are beyond many other displays. LCD increasingly becomes the man-machine interface and display module of all sorts of instrumentation, measurement and control system. Controlling LCD has a very great difficulty in whether the hardware or software programming and using dot matrix to operate display of characters and graphics is also a very complicated work. At present there are many companies that develop LCD control at home and abroad. However, the firms which product the LCD control chip is only applicable to your firm, provided to sex is strong, high and low cost against the civilian products widely used, the LCD display products to the development much inconvenience. Therefore develop a common interface LCD display system has the real meaning.This subject is established in high development of liquid crystal display industry now,and the LCD display control of the status quo, also intelligence LCD terminal system based on NiosⅡ. Intelligent LCD terminal system takes FPGA of Altera Company as centre, combining 320 by 240 TFT LCD set up hardware platforms. The subject to control the LCD ip in the establishment of an embedded system based on NiosⅡ, the software NiosⅡprogramming, to realize the intelligent LCD terminal system of characters, graphic display, and the serial communication of functions. Because of hardware platforms FPGA takes the design of the core of the system as design scheme, small volume, low portable, applies to many kinds of electronic product development. In addition, through improving the bresenham draw a circle of the method to build a new kind of four drawing a circle, which greatly increases speed of drawing circles, in ensure accuracy of circle.Final verification indicates that the issue of intelligent LCD terminal system design successfully completed its due functions, the developers only through the serial port send instructions to the system who can design the graphical interface and save the professional development.