主要器件：

1、AT89C52单片机芯片，控制语音芯片实现语音的录放。

2、语音芯片ISD2560。ISD2560采用多电平直接模拟量存储技术，可以非常真实、自然的再现语音、音乐、音调和效果声，录音时间为60s，可重复录放10万次。

试验程序代码：

//Voice.h程序

#ifndef    _VOICE_H                                // 防止Voice.h被重复引用

#define    _VOICE_H

#include                           // 引用标准库的头文件

#include

#define uchar unsigned char

#define uint unsigned int

void record(void);

void playback(void);

uchar count;                                      // 重复播放次数计数器

uchar StartFlag;                                 // 开始键按下标志

uchar IdleFlag;                                          // 系统是否处于空闲状态标志

/* 定义语音芯片ISD2560的控制引脚 */

sbit START = P1^0;

sbit EOM = P1^4;

sbit PR = P1^5;

sbit PD = P1^6;

sbit CE = P1^7;

#endif

//Voice.c程序

#include "voice.h"

/* 延时t毫秒 */

void delay(uint t)

{

       uint i;

       while(t--)

       {

              /* 对于11.0592M时钟，约延时1ms */

              for (i=0;i<125;i++)

              {}

       }

}

/* 外部中断0服务子程序 */

void out_int0() interrupt 0 using 1

{

      EX0 = 0;                                    // 关外部中断0

       PD = 1;                                             // 进入节电状态  

       if(count<2)                                // 再重播2次，共3次放音

       {

              count++;

              delay(500);                         // 延时500ms

              P2 = P2&0xFC;                          // A8=A9=0

              P0 = P0&0x00;                           // 起始地址为0

              playback();                                 // 从地址0处播放

              EX0 = 1;                             // 开外部中断0          

       } 

       else

       {

              IdleFlag = 1;                        // 变为空闲状态，可以再次按开始键

              count = 0;

       }

}    

/* 主程序 */

void main()

{

       EA = 1;                                             // 开CPU中断

      count = 0;

       StartFlag = 0;

       IdleFlag = 1;

       while(IdleFlag==1)

       {

              if (START)

              {

                     delay(10);                            // 延时去抖动

                     if (START)                        

                            StartFlag = 1;         // 开始键按下标志

              }

              if (StartFlag == 1)

              {

                     do

                     {

                            P2 = P2&0xFC;            // A8=A9=0

                            P0 = P0&0x00;             // 起始地址为0

                            record();               // 录音开始，存放在地址0处

                     }

                     while (START);                    // 开始键松开

                     StartFlag = 0;

                     PR = 1;                               // 结束录音

                     PD = 1;                               // 进入节电状态

                     delay(500);                          // 延时500ms再播放录音

                     EX0 = 1;                      // 开外部中断0

                     P2 = P2&0xFC;                   // A8=A9=0

                     P0 = P0&0x00;                    // 起始地址为0

                     playback();                          // 从地址0处进行第一次播放

                     IdleFlag = 0;                 // 当前不空闲，按开始键无效                

              }

       }

}           

/* 录音函数 */

void record(void)

{

       CE = 0;

       PD = 0;

       PR = 0;  

}

/* 放音函数 */                 

void playback(void)

{

       CE = 0;

       PD = 0;

       PR = 1;  

}