3.2 LCD 显示模块 ...................................................9
3.3 继电器模块....................................................11
3.3.1 电磁继电器工作原理和特征 .....................................12
3.3.2 固态继电器工作原理和特征.....................................12
3.3.3 继电器关键产品技术参数.......................................12
3.4 按键模块.......................................................13
3.5 其它..........................................................13
4 软件设计.........................................................14
4.1 软件总体步骤图.................................................14
4.2 播放/暂停子程序 ................................................15
4.3 LCD 显示模块软件设计 ...........................................17
4.3.1 LCD 初始化函数 ...............................................17
4.3.2 LCD 和继电器函数 .............................................18
5 系统实现.........................................................19
5.1 硬件调试.......................................................20
5.1.1 按键控制实现.................................................20
5.1.2 LCD 显示 ....................................................21
5.1.3 其它.........................................................21
总 结..............................................................22
致谢...............................................................23
参考文件...........................................................24
附录 A 元器件清单 ..................................................25
附录 B 源程序 ......................................................26
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