目 录
摘 要 ......................................................1
ABSTRACT ....................................................2
1.绪 论 .....................................................4
1.1 课题设计的背景及意义 ........................................4
1.2 设计要求及预期目标 ..........................................4
1.3 设计可行性 ..................................................5
1.4 设计方案及步骤 ..............................................5
1.4.1 键盘采集方案选择 .....................................6
1.4.2 设计芯片的选择 .........................................7
2.系统硬件设计 ..............................................7
2.1 系统原理框图 ................................................7
2.2 芯片简介 ....................................................8
2.3 硬件模块设计 ...............................................11
2.3.1 按键电路模块 ...........................................11
2.3.2 液晶显示模块 ...........................................12
2.3.3 声音报警模块 ...........................................12
2.3.4 应答电路 ...............................................13
3.系统软件设计 .............................................13
3.1 主函数程序设计 .............................................14
3.2 中断程序设计 ...............................................15
3.3 显示模块设计 ...............................................16
4. 系统的调试与结果 ........................................18
4.1 调试界面显示 ...............................................18
4.2 结果分析 ...................................................21
结束语 .....................................................21
参考文献 ...................................................22
致谢 .......................................................23
附录 .......................................................24
附录一：PROTEL 原理图 ...........................................24
附录二：PCB 电路图 .............................................25
附录三：实物图 .................................................25
