毕业设计（论文）：基于单片机的录音笔的设计与实现设计.doc

基于单片机的录音笔的
设计与实现
摘要
随着电子技术的飞速发展,数码录音笔已得到越来越多的人的青睐,论文通过对多种录音笔的设计方案进行比较和分析,选定低成本的STC单片机设计一个数字录音笔。
本论文研究基于单片机录音笔的设计,在对音频采集理论研究的基础上,本设计以低功耗STC89C51单片机为控制核心,通过单片机、语音芯片ISD4004、液晶显示LCD12864、键盘模块、温度传感器模块及实时时钟模块结合实现了硬件电路的设计,ISD4004语音芯片使得大大简化了外围电路的设计,也很好保证了录音效果,LCD12864使得人机交互更简洁方便,同时,本设计还增加了时间、温度的显示及语音播报功能。文中也给出了软件部分的程序,并且通过现场调试,达到预期的效果。
数码录音笔在录音领域等实际应用中具有诸多优势,值得进一步学习和研究。
关键词 :低功耗 STC89C51 ISD4004 录音语音播报
Abstract
With the rapid development of electronic technology, digital voice recorder has been more and more people of all ages, the pared and analyzed by a variety of recording pen design, selected low-cost STC microcontroller design a digital voice recorder.
The thesis is based on the design of the single-chip voice recorder, on the basis of theoretical research on audio capture, the design of low power SCM STC89C51 for control core LCD12864, keyboard module, the temperature sensor module, single-chip, voice chip ISD4004, liquid crystal display and the real-time clock module to achieve bination of hardware circuit design, ISD4004 voice chip so that greatly simplifies the design of peripheral circuits is also very good to ensure that recordings, LCD12864 makes the puter interaction more simple and convenient at the same time, the design also increased the time and temperature display and voice broadcast feature. Also gives the software part of the process, and through on-missioning, to achieve the desired results.
Digital voice recorder has many advantages in practical applications such as recording field, it is worth further study and research.
Key words: low-power STC89C51 ISD4004 recording voice broadcast
目录
摘要 I
ABSTRACT II
目录 III
前言 1
1 设计要求及方案 2
设计任务及要求 2
设计方案选择与论证 2
2 系统的硬件设计与实现 4
核心控制模块 4
STC89C58RD+单片机介绍 4
单片机复位、晶振电路设计 7
音频处理模块 8
ISD4004芯片简介 8
SPI 11
LM386芯片简介 14
音频处理电路设计 15
液晶显示模块 16
LCD12864介绍 16
12864模块与单片机接口电路 18
时钟模块 19
DS1302介绍 19
DS1302模块电路 21