基于無線的數據傳輸系統

電子信息工程論文編號:DZXX042  論文字數:12862,頁數:33

目 錄
摘要 I
ABSTRACT II
第1章 緒論 1
1.1 課題背景 1
1.2 課題設計的目的及目標 2
第2章 模塊方案比較與論證 3
2.1 無線數據傳輸模塊 3
2.2 單片機控制模塊 4
第3章 系統硬件設計 6
3.1 系統總體設計 6
3.2 相關芯片介紹 6
3.2.1 單片機AT89C52 7
3.2.2 編解碼芯片PT2262/2272 8
3.3 單元電路的設計及原理圖 10
3.3.1 紅外接收發送模塊 10
3.3.2 鍵盤模塊 13
3.3.3 LED數碼管顯示模塊 13
第4章 系統軟件設計 15
4.1 概述 15
4.2 發送機程序模塊 15
4.3 接收機程序模塊 20
4.4 系統測試方案 22
第5章 畢業設計總結 24
致 謝  25
參考文獻  26
附錄1 鍵盤掃描程序 27
附錄2 設計電路總圖 30

摘要
 隨著當今社會通信、網絡技術飛速發展，各種智能化、網絡化的數字設備不斷地涌現。如何擺脫各類錯綜復雜的有線電纜所帶來的煩惱與不便，建立一個舒適、方便、可靠的無線工作環境已成為人們的迫切愿望。因此，區別于傳統有線傳輸的無線數據傳輸技術應運而生。
 本文論述了基于無線的數據傳輸系統利用專用編解碼器和38K載波調制解調電路，來實現紅外數據傳輸。并對各電路單元模塊進行了論證與比較。實現完成低誤碼率、高速率的數據信息傳輸。本系統通過單片機編程控制、鍵盤行列掃描輸入、數碼管動態顯示操作，實現紅外數據通信。并具有相應的出錯提示等功能，具有良好的人機交換界面。
關鍵詞：單片機；數碼管顯示；紅外通信；編解碼
 ABSTRACT
With the rapid development of communication and network technology, various intelligent and digital network equipments steadily emerged. How to get rid of the trouble and inconvenience of the complicated cable, and establish a comfortable, convenient and reliable wireless work environment has become an urgent desire. So, the wireless data transmission technology which greatly different from the traditional cable transmission, has come out.
 The article discussed a data transmission system based on wireless transmission which uses a special coder-decoder IC and 38 KHz carrier modulation-demodulation circuits to achieve infrared data transmission. Then it goes on to verify and compare each modules of this circuit. The system’s main purpose is to achieve the low wrong code rate and high-speed data transmission. By the way of writing program, inputting the ranks of scan code, coding and decoding, it can accomplish correspondence between principal and subordinate machine, and can show out the message when the transmission process arises mistakes. It also has a good man-machine intercom- munication interface.
Key words：MCU; LED display; Infrared communication; Code and decode