基于STC89C55RD+单片机的LED点阵显示系统的设计

Design of Dot-matrix LED Display System Based on STC89C55RD+ MCU

基于STC89C55RD+单片机的在应用可编程功能,设计了一个LED点阵显示系统。该系统采用了上—下位机的结构构建,上位机PC可通过串行通信接口实现对下位机LED点阵系统显示内容的控制。下位机以LED屏的显示电路和单片机控制电路为核心,在没有外扩程序存储器和数据存储器的情况下,直接利用该单片机大容量的数据flash区,通过在应用可编程功能实现多条信息的实时发布、擦除和修改。

The paper introduces a LED dot-matrix display system based on the IAP of STC89C55RD＋.The system is built on the structure of the upper and lower machine.According to the serial communication interface,the upper machine acted by the computer can control the display content of the lower machine acted by the LED display system.The core of the lower machine is the display circuit of the display screen and the controlled circuit of the MCU.Without extending Flash ROM and RAM,the system can publish, erase or modify the information in real time,using MCU＇s large-capacity data flash with the IAP.