一种面向智能仪器的可重构嵌入式彩色LCD系统设计

A Reconfigurable Embedded Color LCD System Design for Intelligent Instrument

摘要:

按照使用方便、配置灵活、适用面广的特点要求,论证了一种以LPC1788为显示控制器并面向智能仪器的LCD彩色图像图形显示系统的设计方案;首先分析了智能仪器图像图形显示系统的特点和要求；然后给出设计思路和总体方案；接着逐项讨论嵌入式图形显示控制器、显示数据的信息传输与变换、LCD面板接口以及显示数据源所用显示API函数库等系统软硬件的设计与实现；最后采用115200的波特率从外部向显示系统发送显示命令对系统进行实际测试并给出了最终的的实验结果;实验结果表明所设计的显示系统满足普通智能仪器的使用需求。

关键词:图形显示系统;LCD;嵌入式系统;硬件可编程;CPLD 

Abstract:

An embedded color graphic display system for intelligent instrument is constructed, which uses LPC1788 as the display controller and aims at convenient usage, flexible configuration and width different applications. The characteristics and demands of the graphic display system of intelligent instrument are analyzed first. Guideline and outline of the embedded system is proposed followed. Then, the design of the hardware and software of the system, including the embedded graphic display controller, the transmission and transformation of display data, the interfaces between the controller and LCD panel, and the API library used by display data source are discussed one by one. The system test is carried out at last, in which a baud rate of 115200 is used to send display commands to the system from outside of the system and experimental results show that the designed system can meet the requirements of ordinary intelligent instruments。 

Key words:graphics display system; LCD; embedded system; programmable hardware; CPLD