题目：基于单片机的数字FM收音机设计Title：DigitalFMradioDesigningbasedonMCU姓名：XXX学号：XXXXXXXX学院：机械与电子工程学院指导老师：XXXXXXX大学毕业设计（论文）摘要现在人们常使用的收音机为手动调频收台，使用较为麻烦，而且由于接收灵敏度不高，所接收的频段较窄。TEA5767具有高性能的RFAGC电路，其接收灵敏度高、参考频率选择灵活、可实现自动搜台。本课题采用STC89C52单片机和TEA5767为核心器件，用I2C通信方式联接单片机与TEA5767，实现数字FM收音机系统。通过编写软件利用单片机控制TEA5767实现手动活自动调频，收到的信号通过TAD2822功放器件放大后，再用扬声器输出信号。在调频的过程中可以通过LCD1602液晶显示屏来随时查看信号的频率。关键词：数字调频；STC89C52；TEA5767；TDA20301XXXX大学毕业设计（论文）ABSTRACTNowadayspeopleusuallyusetheradioformanualFMaccept,itismuchtrouble,andbecausetherxsensitivityisnothigh,thefrequencybandreceivedisverynarrow。TEA5767hashigh-performanceRFAGCcircuit,highsensitivityreceiving,referencefrequencyselectionflexibleanditcanbetherealizationofautomaticsearchplatform。SointhisdesigningIwillusetheSTC89C52single-chipmicrocomputerandTEA5767asthecorecomponentsofdigitalFMradiosystemandUsetheI2CcommunicationtoconnectbetweenSTC89C52andTEA5767chip。ThroughthesoftwarewrittenandusingsinglechipcomputercontrolTEA5767achievemanuallylivetobeautomaticFM,receivedsignalthroughtheTAD2030amplifieramplificationdevice,thenusethespeakeroutputthesignal。IntheprocessofFMthefrequencyofthesignalcanbecheckedbyLCD1602。Keywords：DigitalFM；STC89C52；TEA5767；TAD20302XXXX大学毕业设计（论文）目录绪论................................................................41基于单片机的FM收音机工作原理.....................................51.1FM收音机的基本工作原理......................................51.2数字调节FM收音机的工作原理.................................51.3用单片机完成数字调节的FM收音机的功能设计...................62硬件电路设计......................................................72.1硬件组成....................................................72.1.1数字FM收音机系统控制中心单片机........................72.1.3PT2257音量模块........................................92.1.4FM收音模块...........................................102.2FM电路及其设计.............................................132.3单片机控制与显示电路.......................................142.4供电电路与放大电路.........................................153软件设计.........................................................163.1键盘与显示函数设计..........................................173.1.1LCD液晶显示函数......................................173.1.2键盘读键子程序：......................................183.2数字调节与收音控制程序设计..................................193.2.1EA5767HN读写寄存器...................................193.2.4收音模块的初始化......................................24结论...............................................................27致谢...............................................................27参考文献...........................................................28附录...............................................................29附录一主程序..................................................29附录二TEA5767读写子程序.......................................32附录三按键子程序..............................................373XXXX大学毕业设计（论文）绪论虽然手机、计算机、电视等各种电子娱乐设施已经越来越普遍，但是收音机在丰富的娱乐媒...
