毕业论文外文翻译--基于at89c52单片机的led显示屏控制系统的设计

毕业论文外文翻译--基于at89c52单片机的led显示屏控制系统的设计内容摘要：

modular structure, and which usually consists of a display module, control system and power system. The display module is constituted by the lattice structure which consists of LED, and is responsible for lightemitting display。 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。 Power system is responsible for transforming input voltage an d current into voltage and current which the screen needs. LED dot matrix display extracted display character font through PC, and sent to the microcontroller, then displayed in the dot matrix screen, which mainly used for display of indoor and outdoor characters. LED dot matrix display can be divided into graphic display, image display and video display by displayed content. Compared with the image display, the characteristics of graphic display is no difference in gray color whether it is monochrome or color display. Therefore, graphic display also fails to reflect the richness of color, and video display can not only show exercise, clear and fullcolor images, but also show television and puter signals. Although there are some differences between the three, but the most basic principles are similar [6]. SCM has excellent cost performance, small size, high reliability, strong control, and widely used in smart instruments, mechanical and electrical integration, realtime process control, robotics, domestic appliances, fuzzy control, munications systems and so on. This article described the design by the LED display relevant principle, and the design of hardware and software structure are described in detail, finally, we simulate for the overall design and analyze the results. II. System Overall Structure Design Single Chip Microputer (SCM) models were selected according to the target, function, reliability, cost, accuracy and speed of the control system. According to the actual situation of the subject, the choice of SCM models mainly considered from the following two aspects: First, SCM has strong antiinterference ability。 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 the more plex control applications[10]. 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。