太原工业学院毕业设计目录1引言............................................................................................................................................11.1国旗自动升降系统国内外发展状况...............................................................................11.2选题目的和意义................................................................................................................22整体设计方案与理论分析...........................................................................................................32.1系统装置理论分析...........................................................................................................32.2电机的选择可以有两种方案...........................................................................................32.3电机驱动选择方案...........................................................................................................42.4语音部分方案的选择与论证...........................................................................................42.5单片机选择方案...............................................................................................................52.6LCD显示选择方案............................................................................................................52.7按键的选择方案...............................................................................................................63系统硬件设计............................................................................................................................73.1STC89C52单片机及相关电路..........................................................................................73.1.1STC89C52单片机概述............................................................................................73.1.2晶振电路................................................................................................................93.1.3复位电路..............................................................................................................103.2电机驱动模块..................................................................................................................103.3步进电机控制方法..........................................................................................................113.4升降旗按键与指示灯电路设计......................................................................................133.5液晶显示电路..................................................................................................................133.6语音模块电路设计..........................................................................................................164系统的软件设计.......................................................................................................................175结论..........................................................................................................................................19致谢............................................................................................................................................20参考文献........................................................................................................................................21附录一元件清单.....................................................................
