【正文】 , images and other information and television, video signal. The LED industry has bee a fastdeveloping emerging industries, a huge market space and foreground capacious. With the rapid development of information industry, the LED display as an important means of information transmission, has been widely used in indoor and outdoor needs the service content and purpose of publicity of public places. Obviously, the LED has bee an important symbol of the city lighting, modern and information society. The design of the LED display is mainly posed by the main control module, LED dot matrix screen module, keyboard module, DS1302 clock module, DS18B20 temperature modules, infrared remote control module. The line scan using the 74HC154 decoder, the column scan using the 74HC595 shift register and the highcurrent transistor SS8550 as a driving element. This article use the STC12C series of highspeed microcontroller as the main controller module, bined with simple external ponents to drive the LED dot matrix screen, to display the contents of the text, time, temperature, etc. Through the software programming can realize showing the contents of the diversification. It is widely used in hospitals, airports, banks, railway stations and other public places, and highly practical. This article details display principle of LED display screen and working procedures, circuit design, software and hardware debug and parameter calculation method. It can realize the Chinese characters move up and down the left and right sides, six kinds of display mode can also achieve display temperature, calendar and infrared control etc. Function. Keywords: SCM。 Infrared remote control. 桂林電子科技大學(xué)畢業(yè)設(shè)計（論文） 第 1 頁 共 1 頁 目 錄 引言 ........................................................................................................................................... 1 1 設(shè)計任務(wù)與方案論證 ................................................................................................... 2 設(shè)計任務(wù) ............................................................................................................................. 2 方案論證 ............................................................................................................................. 2 顯示屏驅(qū)動方式方案論證 ............................................................................................... 2 顯示屏控制方案論證 ....................................................................................................... 3 2 系統(tǒng)硬件設(shè)計與調(diào)試 ................................................................................................... 3 系統(tǒng)主控模塊設(shè)計 ............................................................................................................. 4 顯示電路模塊設(shè)計 ............................................................................................................. 5 LED 點陣模塊 ................................................................................................................... 6 行掃描驅(qū)動電路設(shè)計 ....................................................................................................... 6 列驅(qū)動電路設(shè)計 ............................................................................................................... 8 溫度電路模塊設(shè)計 ............................................................................................................. 9 時間電路模塊設(shè)計 ............................................................................................................11 紅外接收電路模塊設(shè)計 ................................................................................................... 13 報警電路模塊設(shè)計 ........................................................................................................... 15 PCB 電路板的設(shè)計與調(diào)試 ................................................................................................ 15 原理圖繪制和 PCB 電路板的制作 ................................................................................. 15 電路板的焊接與調(diào)試 ..................................................................................................... 16 3 系統(tǒng)軟件設(shè)計與調(diào)試 ................................................................................................. 17 軟件編程與調(diào)試 ............................................................................................................... 17 字模提取軟件 ................................................................................................................. 19 系統(tǒng)開發(fā)軟件 ................................................................................................................. 19 漢字顯示效果編程與調(diào)試 ............................................................................................. 20 溫度程序設(shè)計與調(diào)試 ..................................................................................................... 22 時鐘程序設(shè)計與調(diào)試 ..................................................................................................... 23 紅外程序設(shè)計與調(diào)試 ..................................................................................................... 24 各程序模塊組合調(diào)試 ..................................................................................................... 26 系統(tǒng)綜合性能分析 ........................................................................................................... 26 4 結(jié)論 .................................................................................................................................. 27 謝 辭 .................................................................................................................................... 29 參考文獻 ............................................................................................................................... 30 附 錄 .................................................................................................................................... 31 附錄一 主控制板 PCB 圖 .......................