英文翻譯基于單片機(jī)的LED點(diǎn)陣顯示屏的設(shè)計(jì)

1、衡水學(xué)院畢業(yè)設(shè)計(jì)英文文獻(xiàn)翻譯學(xué)生姓名:肖霄系 別:物理與電子信息系專 業(yè):電子信息工程年 級(jí):2008級(jí)學(xué) 號(hào):200840513043指導(dǎo)教師:郭海麗衡水學(xué)院教務(wù)處印制原 文題目：LED dot matrix screen design based on MCU As a popular display device component, LED dot-matrix display board consists of several independent LED (Light Emitting Diode). The LED dot-matrix display board can di

2、splay the number or sign, and it is usually used to show time, speed, the state of system etc. This paper introduces a kind of simple 1632 LED display screen design process based on STC89C52 single chip minicomputer . The detail hardware scheme, software flow and C language programmer design and so

3、on is followed. The display part can be cascaded to meet the need. The practice proves the design is low-cost and effective. First of all know of LED dot matrix, the so-called of LED dot matrix is LED to more array in a way device, can be divided into monochrome, double-color, three kinds of color.

4、According to the arrangement of polarity LED into type of Yin and Yang type two kinds. According to the matrix each line or each column contains the number of different LED, and can be divided into 5 x7, 8 x 8, 16 × 16 type etc. One of the LED's pin regular connection, divided into type of

5、Yin and Yang of type 8 x8 LED array. Usually the control including glyph LED control (display what characters) and a control (what a display). In the static display mode, each a display of the form the line is independent, respectively, received a eight I/O mouth, the word a line also connected to a

6、nother I/O mouth. When want to display a character, make corresponding LED light can. Now a lot of billboards would do this. This kind of low cost and easy to implement.Dynamic display of use of or more extensive, dynamic display is a a turn LED light, in every time only a display in the work (light

7、), but because of the human eye for a visual effect and leds extinguishing rays, will appear more characters "and" showing that the phenomenon. That in every moment, all LED to show the same characters will, to each show the different characters, they must use scanning methods in turn LED

8、light you, that in every moment is a particular display character, in this moment, broken choose control I/O ports output corresponding characters chosen code (font code). And a selected control I/O mouth in the displaying a send in electricity flat in order to ensure the corresponding character pos

9、ition shows. So take turns, make each timeshare shows that this position should be display character. For example to show LL0-220, I/O 1 and the I/O 2 take turns into the period of choose code, a selected code and show the state. Choose a code, section choose yards into a delay each 1 ms, because th

10、e person's vision for a time a 100 ms, so each show time intervals not more than 20 ms, and keep the delay for a period of time, to temporarily leave cause visual effect, give a person looks in each LED light, and display different content. LED the array of showing the way according to display d

11、ata coding is the order and a line to display. With high state scanning as an example, if want to show the first line, the first will first line display data (00001000) sent to the LED the array of listed pin, again will "10000000" scanning signals sent to LED the array of line pin, can sh

12、ow the first line, this time the other will not display. Likewise, if you want to show the second line, it will be done to the second display data (00100100) sent to the LED the array of listed pin, again will "01000000" scanning signals sent to LED the array of line pin, can show the seco

13、nd line, this time the other will not show.51 MCU has four I/O interface, often the control equipment many external, when the four interface is not enough to use, often external many expansion of equipment used in connection with external chip, here, of LED dot matrix display cannot directly to the

14、I/O mouth, you need through the expanded chip and 8051 connection.Some of the problems about the font, first have a take font software, it can be one of the Chinese characters and image is decomposed into their respective font, font is the LED screen when displayed by the need to invoke dictionaries

15、, through the modification to revise the word to the content of the show. Take font software has a lot of. You can also download on the net. The software and many functions, transverse take font can undertake right movement, vertical mold can take to move up or down, and so on.How to control the fon

16、t and rolling rolling speed, font is the continuous rolling screen display, then first have to know how to display a screen: a screen (full screen) display is displayed by line, quickly. Make the person produces the visual error, feel the entire screen is in the light. In the show by line, show the

17、one line to delay for a while. Here the delay time to determine the t1 shows the time of each screen, that is the dynamic display of speed). 16 × 16 bitmap screen, for example, the first to perform on display, delay, a total of 16 line shows. Then the 16 line that repeated several times, to bet

18、ter see the screen display. (here several times of the number of times the n1 also decided to display the speed). And change the delay time or the number of repeat t1 that can change the rolling n1 speed, when increase the two value, the scrolling speed will slow down, reducing the when two value, t

19、he scrolling speed can be accelerated. The font displayed by the principle for screen, a font of by how much screen, is how many of the display screen.Since 2000, the LED lawn lamp, traffic light, flashlight, floor lamp, landscape lamp began to enter the market, through the development in recent yea

20、rs, the scale more growth. From the application for the development of the product, the first thing is to put the new application developed. April 2008 in Frankfurt, Germany, in the lighting show on 80 companies using Luxe on function device developed application products. However, thinking about wh

21、at the product development, must play LED itself from aspects of advantages, such as from its long life, moistureproof, bear the vibration characteristics, can develop indoor lighting, museum, safety becon light export symbol lamp, flashlight; From focusing the gender is good, characteristics, can d

22、evelop thin form lamps, small desk lamp, advertising light box, stage lights and coal mine lamp; Low voltage, quick drive from the characteristic, can develop a flashlight, maintenance lamp, buried lights, lawn lamp light and water.Red, pure green, pure blue LED tube pouring into China, while domest

23、ic enterprise further research and development work, use red, green, blue tricolor LED the production of full color displays are widely used, entered the stadium, exhibition center, square and other public places, and the domestic big screen into a full-color era.The present system for using AT89S51

24、 matrix LED display system, the advantage lies in the realization of simple circuit, cost is low. If the system is in need of greater character display library, only need to expand AVR RAM or EEPROM, and with more communication MCU AVR can. Of course, then need to pay attention to data writing time

25、problem, so as to avoid the display of synchronization. 譯 文題目：基于單片機(jī)的LED點(diǎn)陣顯示屏的設(shè)計(jì) LED點(diǎn)陣顯示屏作為一種新興的顯示器件,是由多個(gè)獨(dú)立的LED發(fā)光二極管封裝而成. LED點(diǎn)陣顯示屏可以顯示數(shù)字或符號(hào), 通常用來顯示時(shí)間、速度、系統(tǒng)狀態(tài)等。文章給出了一種基于STC89C52單片機(jī)的16×32 點(diǎn)陣LED顯示屏的設(shè)計(jì)方案。包括系統(tǒng)具體的硬件設(shè)計(jì)方案,軟件流程圖和部分C語言程序等方面。在負(fù)載范圍內(nèi), 只需通過簡(jiǎn)單的級(jí)聯(lián)就可以對(duì)顯示屏進(jìn)行擴(kuò)展,是一種成本低廉的圖文顯示方案。首先認(rèn)識(shí)LED點(diǎn)陣，所謂LED點(diǎn)陣就是將多

26、個(gè)LED以陣列方式排成一個(gè)器件，可分為單色、雙色、三色三種。依LED的極性排列分為共陽型和共陰型兩種類型。根據(jù)矩陣每行或每列所含LED個(gè)數(shù)的不同，又可分為5×7、8×8、16×16等類型。其中的LED的引腳有規(guī)律的連接，分為共陽型和共陰型8×8LED陣列。通常LED 的控制包括字形控制（顯示什么字符）和位控制（哪些位顯示）。在靜態(tài)顯示方式下，每一位顯示的字形控制線是獨(dú)立的，分別接到一個(gè)8位I/O口上，字位控制線也連接到另一個(gè)I/O口上。當(dāng)想顯示一個(gè)字符時(shí)，讓相應(yīng)的LED點(diǎn)亮即可?，F(xiàn)在很多的廣告牌都是這樣做的。這種造價(jià)低也容易實(shí)現(xiàn)。 動(dòng)態(tài)顯示用的還是比較廣

27、泛的，所謂動(dòng)態(tài)顯示就是一位一位的輪流點(diǎn)亮LED，在每一時(shí)刻只有一位顯示器在工作（點(diǎn)亮），但由于人眼的視覺暫留效應(yīng)和發(fā)光二極管熄滅時(shí)的余輝，將出現(xiàn)多個(gè)字符“同時(shí)”顯示的現(xiàn)象。即在每一瞬間，所有LED會(huì)顯示相同的字符，要想每位顯示不同的字符，就必須采用掃描方法輪流點(diǎn)亮各位LED，即在每一瞬間只使某一位顯示字符，在此瞬間，斷選控制I/O口輸出相應(yīng)字符選碼（字型碼）。而位選則控制I/O口在該顯示位送入選通電平，以保證該位顯示相應(yīng)字符。如此輪流，使每位分時(shí)顯示該位應(yīng)顯示字符。例如要顯示LL0-220時(shí)，I/O 1和I/O 2輪流送入段選碼、位選碼及顯示狀態(tài)。段選碼、位選碼每送入一次延時(shí)1ms,因?yàn)槿说囊?/p>

28、覺暫留時(shí)間位100ms，所以每位顯示的時(shí)間間隔不能超過20ms，并保持延時(shí)一段時(shí)間，以造成視覺暫留效果，給人看上去每個(gè)LED都在亮，且顯示不同的內(nèi)容。LED陣列的顯示方式就是按顯示數(shù)據(jù)編碼的順序，一行一行地顯示。以高態(tài)掃描為例，若要顯示第一行，則先將第一行的顯示數(shù)據(jù)（00001000）送至LED陣列的列引腳，再將“10000000”掃描信號(hào)送至LED陣列的行引腳，即可顯示第一行，此時(shí)其他行并不顯示。同樣地，若要顯示第二行，則先將第二行的顯示數(shù)據(jù)（00100100）送至LED陣列的列引腳，再將“01000000”掃描信號(hào)送至LED陣列的行引腳，即可顯示第二行，此時(shí)其他行并不顯示51單片機(jī)有四個(gè)I/O接口,經(jīng)常外接許多的控制設(shè)備，當(dāng)這四個(gè)接口不夠使用時(shí)，經(jīng)常外接許多擴(kuò)展芯片用于連接外部的設(shè)備，在這里，LED點(diǎn)陣顯示屏就不能直接接到I/O口上，就需要通過擴(kuò)展芯片與8051連接。關(guān)于字模的一些問題，首先有一個(gè)取字模軟件，可以吧一個(gè)個(gè)的漢字及圖像