【正文】 ..................................................... 1 1 FM 收音機(jī)概述 ............................................................................. 2 發(fā)射系統(tǒng)的簡單概述 ........................................................ 2 接收系統(tǒng)的簡單概述 ........................................................ 2 典型數(shù)字式收音機(jī)模塊組成 ............................................. 3 收音機(jī)的調(diào)制方案簡單介紹和該方案原理簡單介紹 .... 4 收音機(jī)的調(diào)制方案簡單介紹 ................................. 4 調(diào)頻廣播收音機(jī)的原理 ......................................... 5 2 方案論證與硬件選擇 ................................................................... 7 本方案涉及到的硬件選擇 ................................................ 7 無線芯片的選擇 ................................................................. 7 TEA5767 方案選擇 .............................................. 8 TEA5767 的 IIC 總線 .............................................. 8 控制模塊 ............................................................................ 8 STC89C52 外形和引腳 ........................................ 8 STC89C52 主要功能 ............................................. 10 STC89C52 的控制電路 ......................................... 10 液晶顯示頻率 .................................................................. 13 Nokia5110 液晶簡單簡介 ..................................... 13 Nokia5110 液晶特點(diǎn) ............................................. 14 使用 Nokia5110 液晶理由 .................................... 14 SPI 總線 ................................................................. 14 電源模塊 ........................................................................... 16 3 TEA5767 芯片介紹 ..................................................................... 17 TEA5767 寄存器描述 ...................................................... 19 小信號(hào)調(diào)頻收信機(jī)的電路設(shè)計(jì) IV FM 模塊介紹 .................................................................... 25 I2C 總線簡介 .................................................................... 26 4 硬件電路設(shè)計(jì) ........................................................................... 30 電源部分 .......................................................................... 30 微控制部分 ...................................................................... 31 FM 模塊 ............................................................................ 31 液晶顯示模塊 .................................................................. 32 按鍵模塊 .......................................................................... 32 5 軟件設(shè)計(jì) ..................................................................................... 33 軟件設(shè)計(jì)思想和流程圖 .................................................. 33 6 硬件電路調(diào)試與檢測 ................................................................. 35 硬件裝配 .......................................................................... 35 系統(tǒng)測試 ........................................................................... 35 總結(jié) ................................................................................................. 36 致謝 ................................................................................................. 37 參考文獻(xiàn) ......................................................................................... 38 附件 1 程序部分 ............................................................................ 39 function ........................................................................... 39 IIC 通信協(xié)議 .................................................................. 40 LCD5110 ........................................................................ 44 LCD5110 字庫 ............................................................... 50 main ................................................................................ 55 小信號(hào)調(diào)頻收信機(jī)的電路設(shè)計(jì) 1 前言 當(dāng)下 ，隨著數(shù)碼科技的 不斷的 發(fā)展，獨(dú)立的半導(dǎo)體收音機(jī)已漸漸淡出了人們?nèi)粘Ｉ畹囊暰€，取而代之的是小巧精致的數(shù)字音頻播放器 像MP3MP4S 手機(jī)等都自帶收音機(jī) 。 關(guān)鍵詞 ：單片機(jī) FM 收音機(jī) TEA5767 小信號(hào)調(diào)頻收信機(jī)的電路設(shè)計(jì) II Abstract Microcontroller perated into all areas of life, aircraft instrument control, munications and transmission of puter work, the widespread use of a variety of smart IC cards, which are inseparable from the microcontroller. Not to mention the field of automatic control of Intelligent Machines. More important is the application of SCM to change the design of the control system of traditional ideas and methods. Before most of the control functions, hardware circuit is with the microcontroller through the software method. This bination of hardware or software instead of hardware and can improve system performance control technology known as microcontrol technology. For example, this article discusses the microcontroller to control TEA5767 chip driver Nokia 5110 LCD FM radio and display frequency. People often use radio to manual FM radio station, the process is cumbersome, and the receiver sensitivity is not high, narrow band received. This design uses TEA5767 chip, singlechip digital tuning FM stereo radio chip for low voltage applications. TEA5767 chip integrates a plete IF frequency selection and frequency discriminator system, only a few lowcost external ponents, you can achieve all of the features of the FM radio. In addition, it has a highperformance RF AGC circuit, which receives high sensitivity。 TEA5767 芯片內(nèi)集成了完整的 IF 頻率選擇和鑒頻系統(tǒng)，只需很少的低成本外圍元件，就可實(shí)現(xiàn) FM 收音機(jī)的全部功能。 現(xiàn)在人們常常使用的收音機(jī)為手動(dòng)調(diào)頻收臺(tái)，使用的過程比較繁瑣，而且由于接收靈敏度不高，所接收的頻段較窄。這種以軟件結(jié)合硬件或取代硬件并能提高系統(tǒng)性能的控制技術(shù)稱為微控制技術(shù) 。更重要的意義是單片機(jī)的應(yīng)用改變了控制系統(tǒng)傳統(tǒng)的設(shè)計(jì)思想和方法。 小信號(hào)調(diào)頻收音機(jī)的電路設(shè)計(jì) 小信號(hào)調(diào)頻收信機(jī)的電路設(shè)計(jì) I 摘要 單片機(jī) 滲透到我們生活的各個(gè)領(lǐng)域 ， 飛機(jī)上儀表的控制，計(jì)算機(jī)的網(wǎng)絡(luò)通訊 和 傳輸，廣泛使用的各種 智能 IC 卡等， 這些都離不開 單片機(jī)。更不用說自動(dòng)控制領(lǐng)域的智能機(jī)械了。以前采用硬件電路實(shí)現(xiàn)的大部分控制功能，正在用單片機(jī)通過軟件方法來實(shí)現(xiàn)。例如，本文所論述的通過單片機(jī)來控制 TEA5767 芯片驅(qū)動(dòng)諾