摘要蓝牙不是用于远距离通讯的技术，它是一种新兴的低成本的短距离无线通信技术。现在，蓝牙技术的发展非常迅速，被广泛地应用在各个领域。

蓝牙音响的特点是通过蓝牙传输协议进行信息的一个传输和交换。本系统的控制核心是STM32F103C8T6，采用BK8000L蓝牙音频模块与移动设备进行通信，接收蓝牙音频信号，采用差分音频功放芯片推动扬声器，从来实现蓝牙音响的功能。蓝牙音响相比于无线音响有以下四个鲜明的特点：（1）蓝牙技术规格全球统一，使用统一的2.4GHz的工科医（ISM）频段，应用比较广泛；（2）不需要电缆连接，操作简便；（3）传播速度快；（4）蓝牙的传输距离一般在10米以内，适合家居环境使用。此外，系统增加了时间显示的功能，而且通过按键来调节时间显示和控制音量大小，打破了传统音响的形式，设计比较新颖独特，具有创新性。69112

毕业论文关键词：蓝牙音响  STM32  差分音频功放 

Bluetooth Speaker Design Based on Single Chip Microcomputer

Abstract

Bluetooth is not used for long-distance communication technology, it is a new kind of low-cost short-range wireless communication technology. Now, the development of bluetooth technology is very fast, is widely used in various fields. 

    The characteristics of bluetooth speaker is a transport protocol for information via bluetooth transmission and exchange. The control core of this system is STM32F103C8T6, use BK8000L bluetooth audio modules communicate with mobile devices, bluetooth audio signal receiving, the difference of audio power amplifier chip drive a speaker, never realize the function of bluetooth stereo. Bluetooth speaker compared to wireless audio has the following four distinctive features: (1) global bluetooth specification, use unified 2.4 GHz ISM (ISM) band, are widely used; (2) don't need a cable connection, easy to operate; (3) travels faster; (4) bluetooth transmission distance, generally within 10 meters, suitable for household environment. In addition, the function of the system increases the time display, and through the keys to adjust the time display and control the size of the volume, breaking the traditional sound, the form of the design is novel and unique, innovative. 

Key Words: Bluetooth speaker  STM32  Difference of audio power amplifier

目 录

摘要 I

Abstract II

目录 III

图清单 V

表清单 V

1 绪论 1

1.1课题研究背景 1

1.2 蓝牙音响研究现状 1

1.3 课题研究内容 2

2 蓝牙音响简介 3

2.1 蓝牙技术的起源 3

2.2 蓝牙技术的发展 3

2.3 蓝牙技术的应用 4

2.4 蓝牙音响的实现原理 4

3 蓝牙音响硬件系统设计 6

3.1 主控模块 6

3.2 蓝牙音频模块 7

3.3 音频功放模块 8

3.4 显示模块 9

3.5 时钟模块 10

3.6 人机交互模块 12