本科生毕业设计多功能电子秤设计Thedesignofmulti-functionelectronicscale学生姓名朱华玲所在专业自动化所在班级1112申请学位工学学士指导教师职称副教授副指导教师职称答辩时间目录目录设计总说明............................................................................................................................IINTRODUCTION...............................................................................................................II绪论11主要元件的选用方案和简介.......................................................................................21.1控制芯片的选择及其介绍..................................................................................21.1.1PWM模块............................................................................................................21.1.2通信模块（SCI、SPI）...............................................................................21.1.3A/D转换模块....................................................................................................31.2称重传感器的选择及其介绍..............................................................................31.3HX711转换器的介绍...............................................................................................61.4LCD显示屏的介绍...................................................................................................61.54*4键盘的介绍.......................................................................................................72硬件电路的设计...........................................................................................................82.1MC9S12XS128芯片...................................................................................................82.2传感器模块的设计..................................................................................................82.3人机交界的设计......................................................................................................92.4电源模块................................................................................................................112.5报警电路................................................................................................................123软件部分设计.............................................................................................................133.1单片机控制设计................................................................................................133.1.1设计总程序框图.........................................................................................133.1.2主程序设计流程图.....................................................................................143.2AD转换程序设计...................................................................................................143.3键盘程序设计....................................................................................................163.4LCD显示程序设计.................................................................................................164软件调试...........................................................................................................................184.1软件介绍.......................................................................................................................184.2调试过程.......................................................
