51單片機(jī)-超聲波測距程序

源程序：

/* Name: LCD12864(St7920/St7921)+超聲波測距模塊+STC89C52 */

/* HC-SR04 超聲波測距模塊 DEMO 程序 */

/* 晶振：11.0592M */

/* 接線：模塊TRIG接 P1.2 ECH0 接P1.1 */

/* RS(CS) 接 P3.3; */

/* RW(SID) 接 P3.4; */

/* E(SCLK) 接 P3.5; */

/* PSB 接 GND 串行模式 */

/******************************************************************************/

#include

#include

//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(shí)可固定高電平

sbit SID = P3 ^ 4; //數(shù)據(jù)

sbit SCLK = P3 ^ 5; //時(shí)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[]={

/*-- 調(diào)入了一幅圖像：logo.bmp -- */

/*-- 寬度x高度=128x64 歡迎使用本產(chǎn)品LOGO --*/

/*-- 調(diào)入了一幅圖像：C:Documents and Settingslwd桌面新建文件夾X.bmp --*/

/*-- 寬度x高度=128x64 --*/

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

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(dòng)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(jì)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(hào)

Delaynms(5); //延時(shí)是必須的

Send_byte(Hdata); //發(fā)送高四位

Delaynms(1); //延時(shí)是必須的

Send_byte(Ldata); //發(fā)送低四位

Delaynms(1); //延時(shí)是必須的

}

/******************************************************************************/

void Send_byte(unsigned char bbyte) //發(fā)送一個(gè)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(shí)

{

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]=S%1000/100;

disbuff[2]=S%1000%100/10;

disbuff[3]=S%1000%10 %10;

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(jì)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(jì)800MS啟動(dòng)模塊

{

TX=1; //800MS 啟動(dòng)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(jì)算

while(!RX); //當(dāng)RX為零時(shí)等待

TR0=1; //開啟計(jì)數(shù)

while(RX); //當(dāng)RX為1計(jì)數(shù)并等待

TR0=0; //關(guān)閉計(jì)數(shù)

Conut();

delayms(80); //80MS

}

}