LED點陣套件開發（軟件）

電氣工程論文編號:DQ208   論文字數:9133,頁數:27

目錄

摘  要 I
Abstract II
1 緒 論 1
2 系統總體方案設計 2
2.1  系統總體結構 2
2.1.1  系統總體設計的目的 2
2.1.2  系統總體設計的思路 2
2.2  系統主要硬件描述 3
2.2.1  控制單片機——STC89C54的簡要介紹 3
2.2.2  STC89C54的特點及其管腳圖 3
2.2.3  溫度傳感器——DS18B20 4
2.2.4  74HC595移位寄存器 6
2.2.5  時鐘芯片DS1302 7
3   系統硬件設計 9
3.1 系統硬件設計原理圖 9
3.1.1  控制器部分 9
3.1.2  時鐘電路部分 10
3.1.3  LED顯示驅動部分 10
3.1.4  串行數據傳送部分 10
3.2 系統硬件設計實物圖 11
4   系統軟件設計 13
4.1 系統軟件設計的基本思路 13
4.2 系統控制軟件流程 13
4.3 漢字顯示原理 14
4.4 LED靜態顯示 17
4.5 LED動態左移顯示 17
4.6 LED下移顯示 18
4.7 軟件調試 20
5   結 論 21
致 謝 22
參考文獻 23

摘  要
 在現代信息社會，通過宣傳媒介已成為人們獲取信息的一種主要手段。在諸多類型的宣傳媒體中，全彩色、高分辨率的LED大屏幕電子顯示屏具有色彩豐富、亮度高且可調、能夠進行插播和畫面編輯等突出的特點，正發揮著不可替代的作用，而點陣顯示技術是其中的關鍵技術。
 LED點陣電子顯示屏制作簡單，安裝方便，被廣泛應用于各種公共場合，如汽車報站器、廣告屏以及公告牌等。本文介紹的是一種可用在值班室外等場合的公告牌的LED點陣電子顯示屏設計。公告內容隨時可以更新，能夠顯示溫度和日期時間，并具有自動亮度調節功能。考慮到所需元器件的易購性，本設計使用了8×8的點陣發光管模塊，組成16×64發光點陣，顯示待定的中文、字符以及數字。
 本設計所要求的顯示漢字、字母和數字均已實現，并能控制文字的左右移動及速度。同時，溫度與日期時間可以實時顯示，與上位機聯機尚未通信成功。整機系統的硬件制作簡便，難點是軟件設計。本系統采用并行方式顯示，并且采用主從單片機來控制整個系統，這樣能夠大大減化軟件的編寫難度，容易實現各項功能指標。

關鍵詞： LED點陣顯示屏；單片機；驅動電路

Abstract

    In modern times of informational, it has become the one main means that people to gain the information throughing the propaganda medium. In many types’ propaganda medias, entire colored and high-resolution LED large electron display screen has many prominent features which is colorful,.high and adjustable lightness,it can spots,and picture editor. It has been playing an irre
-placeable role. However, lattice display technique is the key techniques.
    Lattice LED electronic display in production is simple, in installation is convenient, which is widely used in various public occasions, such as auto-stop device, advertisement screens, as well as bulletin boards. This article describes a kind of used in the duty room and other places outside of the electronic bulletin boards LED lattice display design. Notice the content can be updated at any time to real-time display of temperature and date and time, and has automatic brightness adjustment function. Taking into account the ease of purchase of the required components, this design uses an 8 × 8 lattice LED modules, composed of 16 × 64 LED lattice, showing pending Chinese characters and digital .    This design required by the display of Chinese characters, letters and numbers have been achieved, and can control the text and move around and speed. At the same time, temperature and date and time can be real-time display, but unsuccess of online communication with the host computer. Machine system's hardware production is simple and software design is difficult. The system uses a parallel display, and the use of master-slave microcontroller to control the entire system, what can greatly reduce the difficulty of the preparation of software, and easy to achieve the function index.

 Key word:  LED lattice displayer；MCU；driver circuit