❶ 51单片机超声波测距代码是多少
1602液晶显示 的超声波模块程序
接口程序里边都有、、
#include<reg52.h>
//#include<delay.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit lcdrs=P2^3;
sbit lcden=P2^2;
sbit trig=P2^0; //超声波发送
//sbit echo=P3^2; //超声波接受
//P0____________DB0-DB7
uchar dis[]="Disp_HC-SR04";
uchar num[]="0123456789";
uint distance;
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=121;y>0;y--);
}
void HC_init()
{
TMOD=0x09;
TR0=1;
TH0=0;TL0=0;
}
uint HC_jisuan()
{
uint dist,timer;
timer=TH0;
timer<<=8;
timer=timer|TL0;
dist=timer/53; //晶振11.0592MHz 距离cm=微秒us/58
return dist; //1个机器周期是12个时钟周期 timer*12/(58*11.0592)=timer/53
}
void HC_run()
{
uint tempH=0x00,tempL=0x00;
TH0=0;TL0=0;
trig=0;
trig=1;
delay(1);
trig=0;
while((TH0-tempH!=0||TL0-tempL!=0)||(TH0==0&&TL0==0))
{
tempH=TH0;
tempL=TL0;
}
delay(1);
}
void lcd_write_com(uchar com) //LCD写指令
{
lcdrs=0;
P0=com;
delay(1);
lcden=1;
delay(1);
lcden=0;
}
void lcd_write_data(uchar date) //LCD写数据
{
lcdrs=1;
P0=date;
delay(1);
lcden=1;
delay(1);
lcden=0;
}
void lcd_init() //LCD初始化
{
lcden=0;
lcd_write_com(0x38);
lcd_write_com(0x0c);
lcd_write_com(0x06);
lcd_write_com(0x01);
}
void lcd_display(uchar temp)
{
uint i;
lcd_write_com(0x82);
for(i=0;i<12;i++)
{
lcd_write_data(dis[i]);
}
lcd_write_com(0x80+0x41);
lcd_write_data('D');
lcd_write_data('i');
lcd_write_data('s');
lcd_write_data('t');
lcd_write_data('a');
lcd_write_data('n');
lcd_write_data('c');
lcd_write_data('e');
lcd_write_data(':');
lcd_write_data(num[temp/100]);
lcd_write_data(num[temp/10%10]);
lcd_write_data(num[temp%10]);
lcd_write_data('c');
lcd_write_data('m');
}
void main()
{
lcd_init();
HC_init();
while(1)
{
HC_run();
distance=HC_jisuan();
lcd_display(distance);
delay(200);
}
}
❷ 51单片机超声波测距代码
1602液晶显示 的超声波模块程序
接口程序里边都有、、
#include
//#include
#include
#define uchar unsigned char
#define uint unsigned int
sbit lcdrs=P2^3;
sbit lcden=P2^2;
sbit trig=P2^0; //超声波发送
//sbit echo=P3^2; //超声波接受
//P0____________DB0-DB7
uchar dis[]="Disp_HC-SR04";
uchar num[]="0123456789";
uint distance;
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=121;y>0;y--);
}
void HC_init()
{
TMOD=0x09;
TR0=1;
TH0=0;TL0=0;
}
uint HC_jisuan()
{
uint dist,timer;
timer=TH0;
timer<<=8;
timer=timer|TL0;
dist=timer/53; //晶振11.0592MHz 距离cm=微秒us/58
return dist; //1个机器周期是12个时钟周期 timer*12/(58*11.0592)=timer/53
}
void HC_run()
{
uint tempH=0x00,tempL=0x00;
TH0=0;TL0=0;
trig=0;
trig=1;
delay(1);
trig=0;
while((TH0-tempH!=0||TL0-tempL!=0)||(TH0==0&&TL0==0))
{
tempH=TH0;
tempL=TL0;
}
delay(1);
}
void lcd_write_com(uchar com) //LCD写指令
{
lcdrs=0;
P0=com;
delay(1);
lcden=1;
delay(1);
lcden=0;
}
void lcd_write_data(uchar date) //LCD写数据
{
lcdrs=1;
P0=date;
delay(1);
lcden=1;
delay(1);
lcden=0;
}
void lcd_init() //LCD初始化
{
lcden=0;
lcd_write_com(0x38);
lcd_write_com(0x0c);
lcd_write_com(0x06);
lcd_write_com(0x01);
}
void lcd_display(uchar temp)
{
uint i;
lcd_write_com(0x82);
for(i=0;i<12;i++)
{
lcd_write_data(dis[i]);
}
lcd_write_com(0x80+0x41);
lcd_write_data('D');
lcd_write_data('i');
lcd_write_data('s');
lcd_write_data('t');
lcd_write_data('a');
lcd_write_data('n');
lcd_write_data('c');
lcd_write_data('e');
lcd_write_data(':');
lcd_write_data(num[temp/100]);
lcd_write_data(num[temp/10%10]);
lcd_write_data(num[temp%10]);
lcd_write_data('c');
lcd_write_data('m');
}
void main()
{
lcd_init();
HC_init();
while(1)
{
HC_run();
distance=HC_jisuan();
lcd_display(distance);
delay(200);
}
}
❸ 什么是超声波雷达
超声波雷达也称超声波传感器，它是利用超声波特性研制而成，是在超声波频率范围内将交变的电信号转换成声信号或将外界声场中的声信号转换为电信号的能量转换器件。