学科分类号 0806
本科生毕业论文(设计)
题目（中文）：基于单片机的数字FM收音机设计
（英文）：The Design of FM Radio Based on MCU
学生姓名： 某某
学 号： 0810404003 系 别： 物理与信息工程系 专 业： 通信工程专业 指导教师： 某某 讲 师 起止日期： 2011.10-2012.5
2012年5月28日
怀化学院本科毕业论文(设计)诚信声明
作者郑重声明：所呈交的本科毕业论文(设计)，是在指导老师的指导下，独立进行研究所取得的成果，成果不存在知识产权争议。除文中已经注明引用的内容外，论文不含任何其他个人或集体已经发表或撰写过的成果。对论文的研究做出重要贡献的个人和集体均已在文中以明确的方式标明。本声明的法律结果由作者承担。
本科毕业论文（设计）作者签名：
年 月 日
目 录
摘 要·····························································································································I 关键词·····························································································································I Abstract ························································································································· II
Key words ····················································································································· II 1 前言···························································································································· 0 2 方案设计与论证········································································································ 2 3 硬件电路设计············································································································ 4 3.1 主控电路············································································································ 4 3.2 音频输出模块电路···························································································· 6 3.3 FM收音电路 ····································································································· 8 3.4 LED数码管电路 ····························································································· 12 3.5 按键电路·········································································································· 13 3.6 I2C总线简介··································································································· 14 3.7 电路装配注意事项·························································································· 17 4 软件设计·················································································································· 17 4.1主程序设计······································································································· 18 4.2 数码管显示控制子程序 ··················································································· 19 4.3收音机控制子程序··························································································· 20 5 系统测试·················································································································· 21 6 结论与心得·············································································································· 22 参考文献······················································································································ 23 致 谢·························································································································· 24 附录A·························································································································· 25 附录B ·························································································································· 31
基于单片机的数字FM收音机设计
摘 要
虽然电视、手机、互联网等媒体和各种便携式娱乐设备已经普及到千家万户，但传统的收音机在丰富的娱乐媒介中任然占有重要地位。随着信息化的发展，收音机逐渐数字化，集成化，而且成本越来越低，这使得在各种设备中嵌入收音机的现象更加普遍。传统的调频收音机存在电路体积大，调谐不方便、稳定性欠佳等弊端。为了解决上述问题，本文提出了一种基于单片机的数字FM收音机设计方案。该系统主控芯片采用AT89C52单片机，并利用BU2614实现的锁相环频率合成器与单片机AT89C52接口，实现88MHZ～108MHZ调频广播的接收。本系统采用TEA5767显示搜索频率，通过数码管显示，并用按键调节频率。本设计与传统调频收音机相比较，具有电路体积小，调谐方便，稳定性好等优点。
关键词
单片机；TEA5767；BU2614
I
The Design of FM Radio Based on MCU
Abstract
Although TV，telephone, Internet and other media and a variety of portable entertainment device have been accessed to thousands of houses, but the traditional radio in the rich entertainment media still occupies an important status. With the development of information age, the radio become more and more digtal, intergrated ,also the cost become less expensive than before . It makes that in many devices which embedded in radio become more and more common. The traditional frequency modulated solution has many problems such as electric circuit physical volume too big and adjust frequency modulation inconvenient, and the stability not so well etc. In order to resolve problems that mentioned above，we presents amethod based on AT89C52 dijital FM radio design.The MCU of digital frequency modulation high fidelity radio adopts the single slice machine of AT89C52. and the single slice machine is the core spare part of this system. This design can receive the FM broadcast of 88MHz ~ 108MHz by using the PPL from BU2614 and the port of the single slice machine of AT89C52. The design of TEA5767 display frequency of search,rhrough digital tube display,and modifies the frequency through the key. The design of traditional FM radio compared with circuit,such as electric circuit physical volume is small and adjust frequency modulation is very convenient, and the stability is very well.
Key words
MCU; TEA5767; BU2614
II