基于51单片机语音存储与回放系统设计
目录 摘
要......................................................................................................................... I
ABSTRACT ........................................................................................................... II 绪
论........................................................................................................................ 1 1 语音录放系统总体设计及主要芯片说明 ............................................................. 4 1.1 总体方案论
证 ............................................................................................... 4 1.2 器件选
择 ....................................................................................................... 5 1.2.1 单片机的选
择 .......................................................................................... 5 1.2.2 语音芯片选
择 .......................................................................................... 6 1.3 AT89C51 芯片说
明......................................................................................... 7 1.3.1 AT89C51 的主要参
数 ............................................................................... 7 1.3.2 AT89C51 的引脚功能说
明 ........................................................................ 8 1.4
ISD2560 语音芯
片 ......................................................................................... 9 1.4.1 ISD2560 的引脚功
能 ................................................................................ 9 1.4.2 ISD2560 的操作模
式 .............................................................................. 10 1.4.3 ISD2560 的分段录放
音 .......................................................................... 11 1.4.5 ISD2560 的应用电
路 .............................................................................. 12 1.5 LM386 集成功率放大器芯片说
明 ................................................................ 13 1.5.1 LM386 电子特
性 .................................................................................... 13 1.5.2 LM386 的引脚说
明 ................................................................................ 14 2 语音录放系统硬件电路设
计 ............................................................................. 16 2.1 系统硬件电路总体设
计 ............................................................................... 16 2.2 AT89C51 的外围电路设
计 ............................................................................ 16
2.2.1 晶振电路设
计 ........................................................................................ 16 2.2.2 复位电路设
计 ........................................................................................ 17 2.3 语音电路设
计 ............................................................................................. 18 2.4 功放电路设
计 ............................................................................................. 19 2.5 键盘输入电路和状态显示电路设计 ............................................................ 19 3 语音录放系统软件设
计..................................................................................... 21 3.1 主要变量说
明 ............................................................................................. 21 3.2 主程序工作原理及流程
图 ........................................................................... 21 3.3 子程序流程图及代
码 .................................................................................. 23 3.3.1 录音子程
序 ........................................................................................... 23 3.3.2 放音子程
序 ................................................................................
........... 24 结束
语 .................................................................................................................. 26 致
谢..................................................................................... 错误！未定义书签。27 参考文
献 .............................................................................................................. 27 附录
1 ................................................................................................................... 28 附录
2 ................................................................................................................... 30 I 摘要 在智能仪器仪表或自动控制设备中，增加语音功能能极大地提高人机界面的 友好性，方便用户操作。在许多场合需要将语音合成、语音识别、语音存储和回 放技术和单片机结合在一起。 常规的模拟化语音处理系统能实现语音的存储与回放功能，但效果不是很好。 本文采用了 Flash 单片机 AT89C51 及数码语音芯片 ISD2560 组成的数字化的语音 存储与回放系统。单片机是系统的控制中心，它主要实现以下的功能：一方面控 制按键识别和功能选择；另一方面控制 ISD2560 语音芯片的录音和放音过程，实 现语音的存储和回放。 本设计首先给出了系统的硬件电路，接着结合硬件电路编写了录、放音控制 程序，最后，对本设计进行总结与展望。 关键词：AT89C51
单片机 ISD2560 语音芯片 语音存储 语音回放 II ABSTRACT In the area of intelligent instruments and automatic control equipments, the system with the phonetic funct ion can greatly increase the friendliness of the man-machine interface, and is also convenient for users to operate. In many situations, designers need to integrate the phonetic synthesis, the phonetic recognition and the phonetic storage and playback technology with the SCM. The common analog-signal digitalize processing system can realize the function of phonetic storage and playback. But the effects are not very good. This dissertation designs the digital phonetic system composed of flash micro-controller AT89C51 and digital audio chip ISD2560. SCM is the control center of the system, it is mainly to achieve the following functions: the keystroke identificat ion and the funct ion selection; phonetic storage and playback by using the digital audio chip ISD2560. Firstly, this dissertation designs the hardware circui t of the system. And then compiles the control program of record and playback. At last, the summary and prospects of the design was presented. Key words: AT89C51 ISD2560 phonetic storage phonetic playback 1 绪论 （1）课题研究背景及科学意义 在智能仪