论文总字数：15775字

摘 要

LED就是在二极管特殊的半导体反应区域里，把不同含量的载流子进行反应，在反应过程中会产生能量的转换，最后通过光信号的形式把反应的能量表现出来，这就达到了电与光交换的应用，最终达到光电交换的目的和意义。通过这样把不同含量的载流子加入混合进行反应的二极管叫做发光二极管，通常叫做LED。因为电子显示屏的生产技术已经很成熟，制造的流程很简单，已经能够达到量产的地步，生产出来拿到生活中应用也很方便，安装很简便，所以在多媒体和生活场景中应用很受欢迎。LED点阵显示屏分为很多类型，但主要还是以点阵模块和单点像素点亮的平面式的显示屏，通常是用来表达时间、温度、仪器状态等。LED点阵显示屏作为一种刚刚有起色的显示仪器，目前已经被广泛用于媒体宣传推广、交通系统、教育体系、银行金融等工业企业管理,该产业面临良好的市场发展前景和机会具有很大的开拓空间。

本次的设计主要是以MSP430系列单片机作为核心控制器件，以相关的接口电路为辅助电路，利用四个8*8点阵屏排列组成的电路，实现汉字“热烈欢迎成贤学院”点阵的动态显示现象。主要的介绍研究背景和LED的发展前景、设计的系统方案、LED点阵显示器原理、硬件电路和软件程序的设计等内容。本设计主要是以MSP430F149为核心的控制芯片，通过软件程序的控制，采用动态扫描技术，采用行列驱动电路实现汉字的显示。

关键词：MSP430f149单片机；LED点阵显示屏；字模的提取

Design and implementation of dynamic Chinese character dot matrix based on MSP430

Abstract

LED is in the diode special semiconductor reaction area, the carrier of different content for the reaction, the reaction process will produce energy conversion, and finally through the form of optical signal to the energy of the reaction, this has reached the application of electricity and light exchange, and finally achieve the purpose and significance of photoelectric exchange. Diodes that react by adding different levels of carriers to the mix are called light-emitting diodes, or leds. Because the production technology of electronic display screen has been very mature, the manufacturing process is very simple, and it has reached the stage of mass production. It is also very convenient for the production to be applied in daily life and easy to install, so the application in multimedia and life scenes is very popular. There are many types of LED dot matrix displays, but they are mainly flat displays lit by dot matrix modules and single point pixels, which are usually used to express time, temperature, instrument status and so on. As a promising display instrument, LED dot matrix display screen has been widely used in media promotion, transportation system, education system, banking and finance and other industrial enterprise management. This industry has a good market development prospect and great opportunities for development.

The design is mainly MSP430 series MCU as the core control device, to the relevant interface circuit as the auxiliary circuit, the use of four 8*8 lattice screen composed of the circuit, to achieve the Chinese character "warmly welcome cheng xian institute" lattice dynamic display phenomenon. This paper mainly introduces the research background, LED development prospect, system design, LED dot matrix display principle, hardware circuit and software program design, etc. This design is mainly based on MSP430F149 as the core of the control chip, through the control of the software program, the use of dynamic scanning technology, the use of column and column drive circuit to achieve the display of Chinese characters.

Keywords: MSP430f149 single-chip microcomputer; LEDs dot matrix display; Extraction of Chinese Character Patterns

目 录

摘 要 I

Abstract II

第一章 引 言 1

1.1 研究背景 1

1.2 研究意义 1

1.3 主要研究任务 2

1.4 研究步骤 2

第二章 LED点阵显示屏的原理 3

2.1 LED点阵显示屏的介绍 3

2.2 16×16点阵LED原理及应用 3

2.3 点阵的显示文字图形原理 5

2.4 驱动方式 6

第三章 系统硬件设计 7

3.1 方案要求 7

3.2 系统框图和控制板电路图 7

3.3 MSP430系列单片机介绍 8

3.4 驱动电路的74HC138芯片介绍 9

3.5 驱动电路的74HC595芯片介绍 10

3.6 驱动电路设计 11

第四章 系统程序的设计 13

4.1 系统主程序 13

4.2 显示驱动程序 14

4.3 软件设计 14

4.4 字模的提取 15

4.5 调试的理论性能分析 16

4.6 系统调试 17

4.7 调试结果分析 17

第五章 结束语 20

致 谢 21

参考文献 22

附 录 23

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