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论文编号:ZD1303 论文字数:15189,页数:45
基于单片机的LED大屏幕显示器设计
摘 要：LED显示屏是利用发光二极管点阵模块或像素单元组成的平面式显示屏幕。由于它具有发光率高、使用寿命长、组态灵活、色彩丰富以及对室内外环境适应能力强等优点，目前已在车站、证券所、运动场馆、交通干道及各种室内、外显示场合的信息发布，公益宣传，环境参数实时，重大活动倒计时等得到广泛的应用。
本文是基于单片机控制的LED大屏幕电子显示屏的设计，整个系统分为硬件设计部分和软件设计部分。硬件设计部分以8051单片机为核心，控制十六个行驱动器74LS154和16个列驱动器74HC595来驱动显示屏显示，本系统全屏能显示八个汉字，采用32块8×8点阵LED显示模块来组成16×128点阵显示模式；软件设计部分主要采用汇编实现，所显示汉字的字模代码由专门的字模提取软件提取。显示采用动态扫描方式，它是一种能使文字轻易地实现移入、移出的显示方式。
本系统所编程序通过wave编译器编译，且在Proteus软件下成功进行了仿真。仿真结果证明系统程序的显示效果较好。
关键字：单片机；LED；点阵汉字；字模提取
MCU-based of LED Big Display Screen Design
Abstract：MCU-based of LED big display screen design
The LED display screen is to make use of light-emitting diode lattice module or the flat surface style that the pixel element is composed of demonstrates a screen. Because it has luminescence rate height , life time strong point , the group state are nimble , the color is rich as well as acclimatization waits for merit by force to interior external environment, the information at present already in the station , bond institute , sports ground mansion , traffic main road and interior , external various display occasion is announced, public good propagate, environment parameter real time, the significant activity countdown waits to be applied broadly.
The main body of a book be the LED large screen electron beam screen that the monolithic machine controls-based design, Entire system is that the hardware designs that the part and the software design a part mark. The hardware design part is centering on 8051 monolithic machine, Come 74 LS154 and 16 column drive controlling sixteen line drive to drive display screen display 74HC595, Originally systematic entire screen can demonstrate eight Chinese characters , adopt 32 piece of 8 X period of time LED at 8 o''clock displays module to come to be composed of 16 X period of time display for 128 points patterns; The software design part adopt assembler realization mainly , what be demonstrated the Chinese character matrix code abstracting a software from special matrix draws. Demonstrate the display way adopt development scanning method , its to be to enter , move take place can make characters come true effortlessly moving one kind.
Have compiled and translated by wave translator-editor, and have carried out what this system weaves a program successfully under Proteus software to simulate. Systematic simulated result certificate procedure display effect is fairly good.
Key words: Monolithic machine; LED; Lattice Chinese character; The matrix is extracte
目 录
摘 要 I
Abstract II
第1章 绪 论 1
1.1 LED显示屏的发展及现状 1
1.1.1 我国LED显示屏的发展历史 1
1.1.2 我国LED显示屏的现状 2
1.1.3 LED显示屏的前景展望 3
1.2 LED显示屏的研究的目的和意义 4
1.2.1 LED显示屏研究的目的 4
1.2.2 LED显示屏研究的意义 5
1.3 课题研究的内容 5
第2章 LED点阵图文显示屏 7
2.1 LED显示屏的特点 7
2.2 LED显示屏的方案实现 8
第3章 系统硬件设计 10
3.1 单片机系统即外围电路 10
3.2 行驱动电路 10
3.3 列驱动电路 11
第4章 系统软件设计 12
4.1 显示驱动程序 12
4.2 系统主程序 13
4.3 多字左移显示子程序 14
4.4 DS1302模块子程序 15
4.5 性能分析 16
4.6 系统调试 17
第5章 单片机串口通讯接口电路 19
总 结 21
致 谢 22
参考文献 23
附录A 硬件原理图及PCB图 24
附录 B 主要汇编程序清单 27
