串口液晶显示屏 dsp c语言显示程序,基于DSP的液晶显示系统设计.doc

墨蓝 2022-10-14 14:49 155阅读 0赞

摘 要

近年来，随着低价格、高性能DSP芯片的出现，DSP已越来越多地被应用于高速信号采集、语音处理、图像分析处理等领域中，并且日益显示其巨大的优越性。而液晶显示屏更以其显示直观、便于操作的特点被用作各种便携式系统的显示前端。传统的液晶显示往往采用单片机控制。但在系统有大量高速实时数据的情况下，单片机由于受到处理速度的限制就显得力不从心。

当前信息时代，信息的获取最终要通过显示来实现人、机交换，由于DSP在高速信号采集、音频处理、图像处理等控制领域无处不在，而液晶显示器以其画质高、功耗低、接口控制方便、可视化人机界面良好等优点，广泛应用在便携式智能仪器仪表的终端显示，成为测量结果和人机对话的重要工具。

本文阐述了DSP芯片TMS320LF2407A内置SED1335点阵式液晶显示模块MSP-G320240的性能特点,提出了一种基于DSP控制的液晶显示器的接口设计，介绍了硬件接口电路和软件设计方法，讨论了在图形液晶显示器上显示字符、汉字、图形的解决方案,给出了相关的程序、时序图、电路框图、程序流程图。实践表明该设计有效地解决了DSP对LCD驱动与显示问题，节省了I/O端口资源,将为各种便携式系统显示终端的设计提供一定的参考与帮助。

通过TMS32OLF2407A与液晶控制芯片SED1335的接口，实现对液晶显示器的控制，用DSP作为液晶显示器主控制器，设计内容包括DSP和液晶模块的硬件连接和程序。在液晶上实现汉字显示，显示画面滚动和位图显示等一些列功能。

关键词：DSP；SED1335；液晶显示器

Abstract

In recent years, with low price, high performance DSP chip, DSP has increasingly being applied to high signal acquisition and processing and image analysis and processing of speech, etc, and increasingly shows its great superiority. But with its LCD display more intuitive and easy operation characteristics of various portable systems were used to display front-end. The traditional liquid crystal display (LCD) often adopts single-chip microcomputer control. But in the system of high-speed real-time data are the cases, due to the chip processing speed limit is ragged.

The information age, information acquisition will ultimately through the display to realize human and machine, high-speed DSP due exchange signal acquisition and processing, and image processing control field everywhere, and with its high quality LCD, low power consumption, interface control convenient, visual interface advantages, such as good, widely used in portable terminal intelligent instrument, measurement results and become the important tool of man-machine dialogue.

This paper stated the functions and features of DSP chip TMS320LF2407A and dot-matrix LCD module MSP-G320240 based on inter SED1335 controller, presented akind of the interface design of the liquid crystal display based on DSP, introduced the circuit of the hardware int