4.2.2 按键的检测 ..............................................18
4.2.3 LCD1602 显示 .............................................19
4.3 电路仿真 ..................................................19
4.3.1 取号时的系统仿真 ........................................19
4.3.2 叫号时的系统仿真 ........................................20
4.4 本章小结 ...................................................23
5 系统的调试和总结 ..........................................................................................24
5.1 系统硬件的实现 ............................................24
5.3 系统集成和测试 ............................................27
5.4 本章小节 ..................................................27
6 总结和展望 ........................................................................................................................................28
6.1 论文主要完成的工作 ........................................28
6.2 问题和前景展望 ............................................28
参考文献...................................................................................................................................30
附录(元件清单)................................................................................................................31
致谢 ..........................................................32