器件清單：
           單片機 瓷片電容0.1uf 電解電容10uf 電解電容220uf 電解電容4.7uf 0.001uf（瓷片電容） 22PF（瓷片電容） LED小燈（5mm） 語音芯片 12864液晶 喇叭 咪頭（話筒）六腳插件（插針）四腳插件（插針）三腳插件（插針） 電阻  1k 電位器1k 獨立按鍵（兩腳） 晶振。

代碼如下：代碼還需要調試

 #include <reg52.h>
 #include<intrins.h>
//超聲波引腳定義
    sbit     RX    =  P1 ^ 1; //接超聲波模塊的Echo引腳
    sbit     TX    =  P1 ^ 2; //接超聲波模塊的Trig引腳。
//LCD12864引腳定義
    sbit     CS    =  P2 ^ 5; //片選 高電平有效 單片LCD使用時可固定高電平   接RS 引腳
    sbit     SID   =  P2 ^ 6; //數據 接RW引腳
    sbit     SCLK  =  P2 ^ 7; //時鐘 接E引腳

//ISD1820引腳定義
    sbit     REC   =  P2 ^ 4; //
sbit     PLAYE =  P2 ^ 3; //
sbit     PLAYL =  P2 ^ 2;   // 

//Function Definition　函數聲明
void Delay(int num);
void Init_DS18B20(void);
unsigned char ReadOneChar(void);
void WriteOneChar(unsigned char dat);
unsigned int ReadTemperature(void);
void clock_out(unsigned char dd);
unsigned char clock_in(void);
unsigned char read_clock(unsigned char ord);
void write_clock(unsigned char ord, unsigned char dd);
void Disp(void);
void id_case1_key(void);
void id_case2_key(void);
void Set_time(unsigned char sel,bit sel_1);
void Timer0_Init(void);
void Init_1302(void);
void Set_Bell(unsigned char sel, bit sel_1);
void Bell(void);
//12864
void Write_char(bit start, unsigned char ddata);
void Send_byte(unsigned char bbyte);
void Delaynms(unsigned int di);
void Lcd_init(void);
void Disp_img(unsigned char *img);
void LCD_Write_string(unsigned char X,unsigned char Y,unsigned char *s);
void LCD_set_xy( unsigned char x, unsigned char y );
unsigned char code num[]={"0123456789 :.-"};
unsigned char code waves[]={"超聲波測距系統"};
unsigned char code znwk[] ={"距離："};
unsigned char code CM[] =  {"M"};
unsigned int  time=0;
         long S=0;
         bit  flag =0;
unsigned char disbuff[4]   ={ 0,0,0,0,};
unsigned char code logo[]={ 
 
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0xE0,0x00,0x00,0x0C,0x00,0x00,0x40,0x70,0x00,0x00,0x00,0x80,0x00,
0x00,0x00,0x00,0xE0,0x00,0x00,0x1E,0x00,0x00,0x60,0x70,0x00,0x00,0x0F,0xE0,0x00,
0x00,0x00,0x01,0xC0,0x00,0x60,0x3C,0x00,0x00,0xE0,0x60,0x00,0x1F,0xFF,0xE0,0x00,
0x00,0x00,0x03,0x80,0x00,0x70,0x70,0x40,0x00,0xE0,0x7E,0x00,0x1F,0xE0,0xC0,0x00,
0x00,0x00,0x03,0x00,0x00,0x73,0xC3,0xF0,0x01,0xC3,0xFC,0x00,0x38,0xE1,0xC0,0x00,
0x00,0x03,0xC6,0x3C,0x00,0x33,0x9F,0xF0,0x03,0x8F,0xC0,0x00,0x30,0xC1,0xC0,0x00,
0x00,0x3F,0xEF,0xFE,0x00,0x03,0x1C,0xE0,0x07,0x01,0xCC,0x00,0x31,0xF1,0x80,0x00,
0x00,0x79,0xDF,0xBC,0x00,0x06,0x18,0xC0,0x0E,0x01,0xFE,0x00,0x77,0xF9,0x80,0x00,
0x00,0x01,0xB0,0x30,0x01,0xC6,0x19,0xC0,0x1E,0x7F,0xDE,0x00,0x6F,0x83,0x80,0x00,
0x00,0x23,0xAC,0x60,0x0F,0xE6,0xF1,0x80,0x3E,0x7B,0x38,0x00,0x61,0x83,0x00,0x00,
0x00,0x37,0x0E,0x00,0x0F,0xC7,0xB7,0x80,0xEC,0x63,0x30,0x00,0xE3,0x03,0x00,0x00,
0x00,0x3E,0x0E,0x00,0x01,0x8F,0x37,0x01,0xCC,0x6F,0xF0,0x00,0xC7,0xF7,0x00,0x00,
0x00,0x1E,0x0C,0x00,0x03,0x1E,0x66,0x03,0x0C,0x7F,0x00,0x01,0xFF,0xE6,0x00,0x00,
0x00,0x1E,0x1C,0x00,0x03,0x1C,0x60,0x02,0x19,0xAC,0x00,0x01,0x96,0x06,0x00,0x00,
0x00,0x3E,0x3E,0x00,0x03,0x18,0x60,0x00,0x19,0xFC,0x00,0x03,0x86,0x0E,0x00,0x00,
0x00,0x7E,0x36,0x00,0x03,0x00,0xC0,0x00,0x38,0x78,0x00,0x03,0x06,0x0C,0x00,0x00,
0x00,0xE6,0x67,0x00,0x03,0x00,0xC0,0x00,0x30,0x78,0x00,0x06,0x0C,0x0C,0x00,0x00,
0x01,0xC6,0xC3,0x80,0x7F,0xF0,0xC0,0x00,0x30,0xFE,0x00,0x0E,0x0C,0x1C,0x00,0x00,
0x03,0x81,0x83,0xC0,0x78,0xFF,0x80,0x00,0x61,0xCF,0x80,0x1C,0x08,0x18,0x00,0x00,
0x06,0x07,0x03,0xE0,0x00,0x1F,0xFF,0xE0,0x67,0x07,0xE0,0x38,0x18,0xF8,0x00,0x00,
0x08,0x0E,0x01,0xF8,0x00,0x07,0xFF,0x80,0xCE,0x03,0xF8,0x60,0x00,0x70,0x00,0x00,
0x00,0x18,0x01,0xF8,0x00,0x01,0xFC,0x00,0xC0,0x01,0xFC,0xC0,0x00,0x70,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x06,0x00,0x00,0x00,0x1C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x07,0x00,0x00,0x00,0x1C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x06,0x00,0x00,0x00,0x0C,0xE0,0x00,0x01,0xE0,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x0E,0x00,0x00,0x00,0x3F,0xE0,0x00,0xFF,0xF0,0x00,0x38,0x00,0xE0,0x00,
0x00,0x00,0x0C,0x00,0x00,0x0F,0xFF,0x80,0x00,0xF8,0xF0,0x00,0x38,0x00,0xE0,0x00,
0x00,0x00,0x0C,0xF0,0x00,0x0F,0xC7,0x00,0x00,0x60,0xE0,0x00,0x38,0x00,0xE0,0x00,
0x00,0x00,0x1F,0xF0,0x00,0x01,0x8E,0x00,0x00,0x60,0xC0,0x00,0x70,0x01,0xC0,0x00,
0x00,0x07,0xFF,0x80,0x00,0x01,0x8C,0x00,0x00,0xE1,0x80,0x00,0x70,0x01,0xC0,0x00,
0x00,0x07,0xF8,0x00,0x00,0x01,0x98,0x00,0x00,0xDF,0xC0,0x00,0x70,0x01,0xC0,0x00,
0x00,0x00,0x78,0x00,0x00,0x01,0xBF,0xE0,0x00,0xFF,0x00,0x00,0x60,0x01,0x80,0x00,
0x00,0x00,0xFC,0x00,0x00,0x7F,0xFF,0xE0,0x00,0xC0,0x00,0x00,0xE0,0x03,0x80,0x00,
0x00,0x01,0xFE,0x00,0x00,0x7F,0xF8,0x00,0x00,0x00,0x00,0x00,0xC0,0x03,0x00,0x00,
0x00,0x03,0xB7,0x00,0x00,0x60,0x00,0x00,0x00,0x00,0x3C,0x00,0xC0,0x03,0x00,0x00,
0x00,0x07,0x67,0x00,0x00,0x60,0x00,0x00,0x03,0x9F,0xFE,0x00,0x80,0x02,0x00,0x00,
0x00,0x0E,0x63,0x80,0x00,0xE0,0x00,0x01,0xFF,0xCF,0x1E,0x01,0x80,0x06,0x00,0x00,
0x00,0x1C,0xE1,0xE0,0x00,0xC0,0x00,0x00,0xE3,0x9C,0x38,0x01,0x80,0x06,0x00,0x00,
0x00,0x38,0xC1,0xF8,0x01,0xC0,0x00,0x00,0xC3,0x18,0x30,0x00,0x00,0x00,0x00,0x00,
0x00,0xE0,0xFC,0xFE,0x03,0x80,0x00,0x01,0xC7,0x18,0x60,0x00,0x00,0x00,0x00,0x00,
0x01,0xDF,0xF8,0xFE,0x03,0x00,0x00,0x01,0x8E,0x1B,0xE0,0x07,0x00,0x1C,0x00,0x00,
0x07,0x07,0x80,0x00,0x07,0x00,0x00,0x01,0xFF,0x3F,0xE0,0x07,0x00,0x1C,0x00,0x00,
0x0C,0x03,0x80,0x00,0x0E,0x00,0x00,0x01,0xF0,0x38,0x00,0x0F,0x00,0x3C,0x00,0x00,
0x00,0x03,0x00,0x00,0x1C,0x00,0x00,0x01,0x00,0x20,0x00,0x06,0x00,0x18,0x00,0x00,
0x00,0x03,0x00,0x00,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0x00,0x00,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x02,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

void Lcd_init(void) //初始化LCD
{
Delaynms(10); //啟動等待，等LCM講入工作狀態
  CS=1;
  Write_char(0,0x30);  //8 位介面，基本指令集
  Write_char(0,0x0c);  //顯示打開，光標關，反白關
  Write_char(0,0x01);  //清屏，將DDRAM的地址計數器歸零 
}

void Write_char(bit start, unsigned char ddata) //寫指令或數據
{
unsigned char start_data,Hdata,Ldata;
  if(start==0)
start_data=0xf8; //寫指令
    else   
    start_data=0xfa;  //寫數據
 
  Hdata=ddata&0xf0;  //取高四位
  Ldata=(ddata<<4)&0xf0;  //取低四位
  Send_byte(start_data);  //發送起始信號
  Delaynms(5); //延時是必須的
  Send_byte(Hdata);      //發送高四位
  Delaynms(1);  //延時是必須的
  Send_byte(Ldata);  //發送低四位
  Delaynms(1);  //延時是必須的
}

void Send_byte(unsigned char bbyte) //發送一個字節
{
unsigned char i;
  for(i=0;i<8;i++)
    {
    SID=bbyte&0x80; //取出最高位
  SCLK=1;
    SCLK=0;
    bbyte<<=1; //左移
    } 
}

void Delaynms(unsigned int di) //延時
{
unsigned int da,db;
  for(da=0;da
    for(db=0;db<10;db++);
}

void Disp_img(unsigned char  *img) //圖形方式12864顯示字模221 橫向取膜
{
unsigned char i,j;
unsigned int k = 0;

Write_char(0,0x36); //圖形方式
for(i=0;i<32;i++)
  {
Write_char(0,0x80+i);
Write_char(0,0x80);
    for(j=0;j<16;j++)
{
Write_char(1,img[k++]);
}
  }

  for(i=0;i<32;i++)
  {
Write_char(0,0x80+i);
Write_char(0,0x88);
    for(j=0;j<16;j++)
{
Write_char(1,img[k++]);
  }
}
}
void Clr_Scr(void)//清屏函數
{
Write_char(0,0x01);
}

void LCD_set_xy( unsigned char x, unsigned char y )
{ //設置LCD顯示的起始位置，X為行，Y為列
    unsigned char address;
switch(x)
{
case 0: address = 0x80 + y; break;   
    case 1: address = 0x80 + y; break;
case 2: address = 0x90 + y; break;
    case 3: address = 0x88 + y; break;
case 4: address = 0x98 + y; break;
default:address = 0x80 + y; break;
}
    Write_char(0, address);
}

void LCD_Write_string(unsigned char X,unsigned char Y,unsigned char *s)
{ // 中英文字符串顯示函數
LCD_set_xy( X, Y );
   
    while (*s)
    {
Write_char( 1, *s );
   s ++;
Delaynms(1);
}
}

void LCD_Write_number(unsigned char s)// 數字顯示函數
{
Write_char(1,num[s]);
Delaynms(1);
}
void Lcd_Mark2(void)
{
Clr_Scr();//清屏
LCD_Write_string(1,0,znwk);//
LCD_Write_string(2,0,waves);//
LCD_Write_string(3,7,CM);//
}

 void Conut(void) //計算距離，如果更改精度可在此修改
{
  time=TH0*256+TL0;
  TH0=0;
  TL0=0;
  S=time*1.87/100;       //算出來是CM  11。0592M晶振   須修改
  if(S>200)          //這里需要調試
  {
  PLAYE=1;
Delaynms(1);
PLAYE=0;
  }
  if(flag==1)      //超出測量
 { 
  flag=0;
  LCD_set_xy( 3, 4 );
  LCD_Write_number(13);
  LCD_Write_number(12);
  LCD_set_xy( 3, 5 );
  LCD_Write_number(13);
  LCD_Write_number(13);
 
  }
else
 {
  disbuff[1]=S00/100;
  disbuff[2]=S000/10;
  disbuff[3]=S00 ;
  LCD_set_xy( 3, 4 );
  LCD_Write_number(disbuff[1]);
  LCD_Write_number(12);
  LCD_set_xy( 3, 5 );
  LCD_Write_number(disbuff[2]);
  LCD_Write_number(disbuff[3]);
 }
}
 
void delayms(unsigned int ms)
{
unsigned char i=100,j;
for(;ms;ms--)
{
while(--i)
{
j=10;
while(--j);
}
}
}
     void zd0() interrupt 1 //T0中斷用來計數器溢出,超過測距范圍
  {
    flag=1; //中斷溢出標志
  }
   void  StartModule()         //T1中斷用來掃描數碼管和計800MS啟動模塊
  {
 TX=1;                 //800MS  啟動一次模塊
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 _nop_();
 TX=0;
  }
void main(void)
{ 
    TMOD=0x01;   //設T0為方式1，GATE=1
TH0=0;
TL0=0;
TR0=1;

Lcd_init();       //設置液晶顯示器
Clr_Scr();        //清屏
Disp_img(logo);  //顯示歡迎使用本產品LOGO
Delaynms(1000);
Lcd_init();       //從圖形顯示狀態下返回
    Lcd_Mark2();

REC=0;  //錄音先錄好   如果不能先錄好這里就有可能不能用
PLAYE=0;  //上升沿觸發
PLAYL=0;  //高電平觸發

while(1)
{
StartModule(); 
        //計算
while(!RX); //當RX為零時等待
TR0=1;    //開啟計數
while(RX); //當RX為1計數并等待
TR0=0; //關閉計數
Conut();
delayms(80); //80MS

}

}