目 录
前 言 ..............................................................................................................1
第 1 章 LED 显示屏简介..................................................................................4
§1.1 LED 显示屏的未来发展方向 ................................................................5
§1.2 LED 显示屏介绍 ...................................................................................5
§1.3 LED 显示屏的发展过程 ........................................................................7
§1.4 LED 显示屏的类型 ...............................................................................8
§1.5 LED 显示屏的控制技术 ........................................................................9
第 2 章 显示控制和驱动电路 .........................................................................10
§2.1 LED 显示器的工作原理 ......................................................................10
§2.2 LED 显示器的显示方式 ......................................................................12
§2.2.1 LED 的动态显示方法 ...................................................................12
§2.2.2 LED 的静态显示方法 ...................................................................13
§2.3 芯片介绍 ............................................................................................13
§2.4 显示驱动芯片的选取 .........................................................................14
第 3 章 硬件电路 ...........................................................................................16
§3.1 主要器件 ............................................................................................16
§3.2 电路原理图 ........................................................................................16
§3.3 电路分析 ............................................................................................19
§3.3.1 时钟电路 .....................................................................................19
§3.3.2 复位电路 .....................................................................................19
§3.3.3 硬件连接 .....................................................................................19
§3.4 MAX7219 引脚说明 ............................................................................20
§3.5 MAX7219 的工作原理 ........................................................................22
§3.6 驱动显示屏 ........................................................................................22
第 4 章 系统软件设计 ....................................................................................28
§4.1 MAX7219 的工作描述 ........................................................................28
§4.2 流程图 ................................................................................................29
§4.3 程序设计 ............................................................................................29