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来源：百度知道 编辑：UC知道 时间：2024/06/15 09:48:37
LED点阵显示屏是由几万--几十万个半导体发光二极管像素点均匀排列组成新型信息显示媒体，它可以实现中英文字符、图形图象的动态显示。本设计实现了一款以单片机AT89S51为控制器、74LS164为串并转换器、74LS373为锁存器的LED点阵显示屏系统。它包括硬件设计和软件设计，硬件设计包括：控制单元的设计、译码电路的设计、电源模块的设计、驱动电路的设计和通信系统的设计。软件设计包括：通信程序的设计、显示程序的设计和主程序的设计。联合软件和硬件，将设计的程序写入到KeilC51中调试，然后下载到实验箱里的单片机中，仿真得到了预期的结果—动态显示的文字和图像。PC机与单片机之间的通信采用RS—232C通信标准来实现，AT89S51单片机具有价格低廉、程序写入方便的特点使得整个系统方便维护和检修。同时，该系统只占用了单片机少量的I /O口和内存，为系统留下了功能扩展的空间。

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LED dot matrix display by the tens of thousands - hundreds of thousands of semiconductor light-emitting diode pixel array composed of uniform media, new information shows that it can be achieved in both Chinese and English characters, graphics, dynamic display of images. The design in order to achieve a single-chip AT89S51 controller, 74LS164 and converters for the string, 74LS373 to latch the LED dot matrix display system. It includes hardware design and software design, hardware design, including: the control unit design, the design of decoding circuits, power modules, design, driving circuit design and communication system design. Software design include: the design of communication program, display program design and the design of the main program. Joint software and hardware, will be written procedures designed to KeilC51 debug, and then downloaded to the microcontroller in the box experiment, the simulation results to be expected - dynamic display of text an