Software And Hardware Design Of FPGA Based Complex Enhanced Display System

Along with the development of the science and technology, the improvement of the life standard sees increasingly high requirements for the display effects in industrial and agricultural fields, medical care and civilian areas. These requirements often include capabilities of the overlap of picture layers, instant scaling and video display. However, the ordinary chips have the Liquid Crystal Display (LCD) controller with limited performance unable to satisfy the demand, while the professional display chips are expensive and with very complex circuits, which appeals to a composite display controller of multiple functions, simple circuitry and low price.In recent years, the rapid development of Electronic Design Automatic (EDA) and Field Programmable Gate Array (FPGA) enables tailoring chips to the specific needs. This paper introduces a FPGA-based composite image display system. It features supporting TFT-LCD of 640x480 resolution, able to display 16-bit color and 6-bit grayscale; capable of scaling and display of real-time image, supporting NTSC, PAL, SECAM and other video standards, and automatically identifying and converting; supporting clipping and overlapping of picture layers, which lessens the burden of DSP. In addition to the ordinary time sequence Read/Write(R/W), the burst R/W mode fastens the speed of DSP access to display memory, more rapidly than two times of the ordinary speed. This system uses hardware instructions design, which simplifies the system design and realization. Due to simple circuitry and intense integrity, this system is very stable, reliable, and suitable for mass production.This paper firstly collects the related stuff and analyzes the principle of LCD, then brings forward and discusses the design schema and determines the framework of the system, which is composed of SDRAM control module, LCD control module, VIDEO module, Digital Signal Processing (DSP) interface module, and central control module, which is followed by the practical scenarios of hardware and software. Finally, system simulation and test are completed with the system performances achieving the project requirements.