基于NiosII处理器液晶图形显示技术的研究

Research of LCD Graphics Display Technology Based on Soft-Core Processor Nios II

本文利用NiosII软核在现场编程逻辑门阵列(FPGA)芯片中实现用户定制的处理器,以及处理器NiosII与液晶显示模块的接口和图形显示的编程技术;采用了Bresenham画线算法在液晶显示屏上可以显示任意两点间的直线,并且给出了画点和线的NiosII应用程序,实现了嵌入式NiosII软核的可编程单芯片系统(SOPC)和液晶显示模块中图形显示。并以240×128点阵型液晶显示模块MGL240128T为例,研究了嵌入式NiosII软核处理器与液晶显示模块的接口和图形显示技术。经实验表明该系统具有高集成度、高可靠性、较好的可移植性和扩展。

A graph display technology for the LCD display based on the Embedded Processor Nios Ⅱ is presented. The Altera softcore processor Nios Ⅱ is used as a user custom processor in the field programmable gate array （FPGA） device. Both a design of hardware interface between Nios Ⅱ and LCD module and the relevant program technology of graph display are introduced. Adopting the Bresenham line-drawing arithmetic, it can display a straight line between any two points on the LCD panel. The Nios Ⅱ applications implemented drawing the lines and points are given to realize the graph display on the LCD module which controlled by a pro- grammable single-chip system （SOPC）with the Nios Ⅱ Embedded Processor. As an example, the 240×128 lattice LCD module MGL240128T has been chosen to research the graph display technology as well as the interface that joint the embedded Nios II softcore processor and the LCI） display module. The test results confirm that the proposed system has high reliability and integration degree as well as the good extension and transplanted ability.