超聲波測距的模塊，51單片機接上12864液晶，HC-SR04超聲波模塊，就可以了，具體程序沒怎么看，超聲波模塊的硬件也不曉得，今天先貼個圖，貼個程序吧（程序是淘寶買的模塊附贈的）。

超聲波測距51單片機12864液晶顯示源程序：
 #include <reg52.h>
 #include<intrins.h>
//引腳定義
    sbit     RX    =  P1 ^ 1;
    sbit     TX    =  P1 ^ 2;
    sbit     CS    =  P3 ^ 3; //片選 高電平有效 單片LCD使用時可固定高電平
    sbit     SID   =  P3 ^ 4; //數(shù)據(jù)
    sbit     SCLK  =  P3 ^ 5; //時鐘

//Function Definition　函數(shù)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(tǒng)"};
unsigned char code znwk[] ={"智能微控工作室"};
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(tài)
   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(biāo)關(guān)，反白關(guān)
   Write_char(0,0x01);  //清屏，將DDRAM的地址計數(shù)器歸零 
}

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

void Send_byte(unsigned char bbyte) //發(fā)送一個字節(jié)
{
 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(shù)
{
 Write_char(0,0x01);
}

void LCD_set_xy( unsigned char x, unsigned char y )
{ //設(shè)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(shù)
 LCD_set_xy( X, Y );
   
    while (*s)
    {
  Write_char( 1, *s );
     s ++;
  Delaynms(1);
 }
}

void LCD_Write_number(unsigned char s)// 數(shù)字顯示函數(shù)
{ 
 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)
 {
    time=TH0*256+TL0;
    TH0=0;
    TL0=0;
    S=time*1.87/100;       //算出來是CM   11。0592M晶振
    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(shù)器溢出,超過測距范圍
  {
    flag=1;        //中斷溢出標(biāo)志
  }

   void  StartModule()            //T1中斷用來掃描數(shù)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(shè)T0為方式1，GATE=1
 TH0=0;
 TL0=0;
 TR0=1;

 Lcd_init();       //設(shè)置液晶顯示器
 Clr_Scr();        //清屏 
 Disp_img(logo);   //顯示歡迎使用本產(chǎn)品LOGO
 Delaynms(1000);
 Lcd_init();       //從圖形顯示狀態(tài)下返回
    Lcd_Mark2();

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

 }