基于SPI总线的LED彩屏硬件设计及优化

Hardware Design and Optimization for LED Colored Screen based on SPI

该设计是单片机嵌入式系统在LED彩色显示屏上的应用,主要实现的是PC机与单片机的通信,即从PC机上输入字符、数据和图像,再通过单片机处理,显示在大型彩色LED显示屏上这一过程的软、硬件设计.给出了硬件设计和优化的实现过程,并对在使用同一信号源的前提下,读数据信号及屏幕显示等控制信号衔接配合的工作过程进行了探讨.该设计的关键在于SPI总线电路、基于RAM的显示电路和控制电路的设计及优化.

The design is the application of MCU Embedded System IN LED colored screen, which mainly realizes the communication between PC and MCU, i.e., inputting characters, data and pictures in PCs; displaying information on LED screen with MCU processing. The realizing process of hardware design and optimization is given, and the working process of coordination among such control signals as data reading and screen display is discussed on the premise of using a same signal source. The key of the design lies in the design and optimization about SPI circuit and the circuit for display and control based on RAM.