本科论文设计-基于单片机的LED点阵显示屏的设计与实现.doc

基于单片机的LED点阵显示屏的设计与实现 摘 要 关键词：Design and Implementation of MCU-based LED Dot Matrix Display Abstract Today, The rapid development of electronic technology, Dot-matrix display has been growing attention, known. Everywhere in our daily life, The so-called LED dot matrix, By controlling the semiconductor light-emitting diode light off to achieve text, pictures, video display, It has a variety of colors can be issued a number of diodes, There controlled by different parts of the light off to display characters, The display screen has a colorful, large viewing angle, stable, low power consumption and many other advantages, Therefore, Recognized by more and more businesses, In recent years, the rapid development of outdoor LED advertising, Compared with traditional advertising, Display timely replacement, Without frequent replacement, Labor-saving, I believe in the future of LED display technology will be deeper into the life and work among the thousands of families. The design and implementation of a microcontroller-based small LED display, It’s divided into two parts, The main control card and the display screen, Controlled by the microcontroller as a control chip card, DS1302 clock chip and DS18B20 temperature sensor, As a source of information of time and temperature, Download and use the C programming language to achieve control of each pin on the microcontroller, A display screen constituted by a light emitting diode, 74HC595 chip (eight parallel output shift register) as column scanning circuit, 74HC138 decoder circuit as line scan, Dynamic scanning principle to achieve the temperature, date, text and other information is displayed, The design is divided into three stages, Namely, pre-planning, hardware production and software debugging, These three parts are also made ??to go through part of the embedded development, Achieve the learning objectives of combining theory and practice, Enhanced ability, There is a degree of understanding of the project to develop a sy