外文翻譯--基于at89c51單片機的led顯示控制系統(tǒng)-單片機-展示頁
2025-05-27 07:29本頁面
【正文】 先 ，控制到 8255年控制字寫端 口 ， 8255工作采用 模式 0的方式。 在單片機是封閉的數(shù)據(jù)傳輸后 ， 這樣的第一列顯示數(shù)據(jù) ， 然后叫延遲程序顯示內(nèi)容的穩(wěn)定。 因為屏幕尺寸是 32 192，192行顯示 ， 顯示屏可以 構(gòu)成一幅 穩(wěn)定而且完整的 圖像。漢字顯示是 32 32點陣模型 ， 實現(xiàn)實時顯示屏幕顯示的變化 ， 顯示當前日期和時間。只要 通過擴展 單片機 的 I / O， 同時增加不同的 LED點陣和相關 驅(qū)動 芯片 ， 你 就 可以設計一個更大的面積和更多 LED 顯示屏 。 5 Design of LED Display Control System Based on AT89C52 Single Chip Microputer ABSTRACT THIS paper introduces display design process about hardware and software based on AT89C52 single chip microputer. We use a simple external circuit to control the display screen, which size is 32 192. The display screen also can display the size of the six 32 32 dot matrix Chinese characters by a dynamic scan mode, and can be divided into two small display screens, which can display twentyfour Chinese characters whose size is 1616. We can modify the code to change the content of the display, subtitles can achieve scrolling function and the scroll speed can be adjusted according to requirements, subtitles can also achieve pause function. The Chinese character code stored in external data memory, the capacity of data memory is expanded according to the requirements of Chinese characters we want to show. This display screen has advantages of small volume, few hardware and simple circuit structure. KEY WORDS LED, Chinese Character Display, AT89C52 I. INTRODUCTION LED display has bee an important symbol of the city lighting, modernization and information society with continuous improvement and beautification of people39。 the screen can display text, pictures, video and so on by control system which can control light or dark of LED in the corresponding region。 Second, SCM has a higher costeffective. Due to MCS51 is widely used in China, has more information and can patible with the more peripheral chips too, in particular, ATMEL Corporation, introduced a new generation microcontroller in 2020, that is 89S series, and its typical products with high performance and low cost microcontroller is AT89C52. AT89C52 is a low voltage, highperformance CMOS 8bit microcontroller, the chip includes 8 KB readonly program memory (PEROM) which erase can be repeated, 256byte random access data memory (RAM), devices adopt highdensity nonvolatile memory technology to produce, patible with the standard MCS51 instruction set and the 8052 products, while the chip builtin generalpurpose 8bit central processing (CPU). Flash storage unit, can be applied to 7 the more plex control applications. The system was realized by the circuitry which is made up of AT89C52 chip, Clock circuit, reset circuit, column scan driver circuit, line drive circuit and the six 32 32 LED dot matrix, the overall structure of LED characters display is shown in . A display unit is posed of dot matrix and two 74HC154. Line data signal is divided into two parts, which is given by the two 8255A respectively, but the 8255A data are from the P0 port the master controller AT89C52. The column scanning signal of each character was given by the two 74HC154, the 74HC154 12 pieces and was divided into six groups. The input signal of 74HC154 was given by the ~ of AT89C52. External data memory 6264 connected with the AT89C52 the P0 port. III. SYSTEM HARDWA
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