【正文】
畢業(yè)論文(設計 ) 基于 PC 機控制的點陣顯示屏設計 學 生 姓 名: 指導教 師 : 合作指導教 師 : 專業(yè)名 稱 : 電子信息工程 所在學 院 : 信息工程學院 2021 年 6 月 目 錄 摘 要 ............................................................................................................................. Ⅰ ABSTRACT ..................................................................................................................... Ⅱ 第一章 緒 論 ................................................................................................................... 1 課題背景 ................................................................................................................ 1 研究現(xiàn)狀及發(fā)展趨勢 ............................................................................................ 1 第二章 系統(tǒng)方案論證與選擇 ..................................................................................... 3 方案論證 .................................................................................................................. 3 各模塊方案選擇與論證 .......................................................................................... 5 第三章 系統(tǒng)硬件電路設計與實現(xiàn) ........................................................................ 6 硬件電路設計 ...................................................................................................... 6 各單元電路說明 .................................................................................................. 6 第四章 系統(tǒng)軟件設計 ............................................................................................. 15 系統(tǒng)軟件編譯器介紹 ........................................................................................ 15 軟件的選擇 ........................................................................................................ 15 程序主系統(tǒng)及驅動系統(tǒng) .................................................................................... 16 串口通信設計 .................................................................................................... 17 上位機功能實現(xiàn)說明 ........................................................................................ 23 第五章 系統(tǒng)調試及結果分析 ............................................................................... 24 系統(tǒng)調試 ............................................................................................................ 24 結果分析 ............................................................................................................ 25 第六章 總結 ................................................................................................................ 26 致 謝 .............................................................................................................................. 27 參考文獻 ....................................................................................................................... 28 附錄 1 硬件電路圖 ................................................................................................ 29 附錄 2 單片機 機程序 ............................................................................................ 30 Ⅰ 摘 要 本設計是一基于 PC 機控制的 1616 點陣 LED 漢字顯示屏的設計。 整機以 AT89C51 單片機為核心,介紹了以它為控制系統(tǒng)的 LED 點陣電子顯示屏的動態(tài)設計和開發(fā)過程。 該系統(tǒng)通過 RS232 與上位機 PC 進行串行通信,采用計算機串口對其進行數(shù)據(jù)輸入,能實現(xiàn)屏幕顯示內容的實時采集; 通過該芯片控制一個行驅動器 74HC154 來驅動顯示屏顯示。該電子顯示屏可以顯示各種文字,全屏能顯示 一 個漢字,采用 4 塊 88 點陣 LED 顯示模塊來組成1616 點陣顯示模式。顯示采用動態(tài)顯示,使得文字能夠實現(xiàn)靜止、移入移出等多種顯示方式。文中詳細介紹了 LED 點陣顯示的硬件設計思路、硬件電路各個部分的功能及原理、相應軟件的程序設計,以及使用說明等。 單片機控制系統(tǒng)程序采用單片機匯編語言進行編輯,通過編程控制各顯示點對應 LED 陽極和陰極端的電平,就可以有效的控制各顯示點的亮滅。所顯示字符的點陣數(shù)據(jù)可以自行編寫(即直接點陣畫圖),也可從標準字庫中提取,但此次設計我們采用從標準字庫中提取 。 經(jīng)實踐證明,該系統(tǒng)顯示誤差小,性能穩(wěn)定,結構合理,擴展能力強。 關鍵詞: AT89S51 單片機, LED 點陣顯示,動態(tài)顯示,串行通信,匯編語言大連海洋大學本科畢業(yè)論文(設計) ABSTRACT Ⅱ ABSTRACT This design is a 16 16 lattice LED electron display monitor design basic on personal puter. The whole equipment is with the 40pin AT89C521MCU (Micro Controller Unit) produced by the American ATMEL pany at the core, introduced take it as the control system LED lattice electron display monitor dynamic design and the development process. The system through the RS232 and PC to PC serial munications, using its puter serial port for data input, to achieve realtime screen display the contents of the good driver 74HC154 and eight row driver 74HC595 through this chip actuates the display monitor demonstration. The electronic screen can show all kinds of written, sixteen full screen display Chinese characters, four pieces of 88 dotmatrix LED display modules to form the 1616 dot matrix display mode. Show dynamic show that makes static graphic or text can be achieved, shifted out of various formats. This paper describes the hardware design of the LED dot matrix display, and the principle function of the various parts of the circuit, the corresponding software program design and the use of some such. SCM process control system used for editing MCU assembly language, Programming control points indicated by the corresponding LED anode and overcast extreme level. We can effectively control the defense showed bright spots. The lattice data shows characters can prepare themselves (that is, direct lattice Painting), which can also be extracted from the standard this time we adopt being extracted from the standard font. As the practice proves, the system possesses advantages in low shows errors, stable, rational structure and strong extensible abilities. Key words: AT89S51microcontroller, LED dot matrix display, Dynamic display, Serial port correspondence control system, Assembly language大連海洋大學本科畢業(yè)論文(設計) 第一章 緒論 1 第一章 緒 論 課題背景 在短 短的十來年中, L