51单片机超声波模块的C语言学习知识程序.doc
./超声波模块程序/超声波模块程序/Trig = P20/Echo = P32#include #define uchar unsigned char#define uint unsigned intint time;int succeed_flag;uchar timeL;uchar timeH;sbit Trig=P10;sbit Echo=P32;uchar code table=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f, 0x6f;uchar code table1=0,1,2,3,4,5,6,7;/void delay(uint z) uint x,y; for(x=z;x0;x-) for(y=110;y0;y-);/void delay_20us() uchar a ; for(a=0;a100;a+); /*/显示数据转换程序void display(uint temp) uchar ge,shi,bai; bai=temp/100; shi=(temp%100)/10; ge=temp%10; P2=table12; P0=tablege; delay(1); P2=table11; P0=tableshi; delay(1); P2=table10; P0=tablebai; delay(1); /*void main() uint distance;/ test =0; Trig=0; /首先拉低脉冲输入引脚 EA=1; /打开总中断0 TMOD=0x10; /定时器1，16位工作方式 while(1) EA=0; /关总中断 Trig=1; /超声波输入端 delay_20us(); /延时20us Trig=0; /产生一个20us的脉冲 while(Echo=0); /等待Echo回波引脚变高电平 succeed_flag=0; /清测量成功标志 EA=1; EX0=1; /打开外部中断0 TH1=0; /定时器1清零 TL1=0; /定时器1清零 TF1=0; /计数溢出标志 TR1=1; /启动定时器1 delay(20); /等待测量的结果 TR1=0; /关闭定时器1 EX0=0; /关闭外部中断0 if(succeed_flag=1) time=timeH*256+timeL; distance=time*0.0172; /厘米 if(succeed_flag=0) distance=0; /没有回波则清零/ test = !test; /测试灯变化 display(distance); /*/外部中断0，用做判断回波电平void exter() interrupt 0 / 外部中断0是0号 EX0=0; /关闭外部中断 timeH =TH1; /取出定时器的值 timeL =TL1; /取出定时器的值 succeed_flag=1;/至成功测量的标志 /*/定时器1中断,用做超声波测距计时void timer1() interrupt 3 / TH1=0; TL1=0; 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 intsbit lcdrs=P23;sbit lcden=P22;sbit trig=P20; /超声波发送/sbit echo=P32; /超声波接受/P0_DB0-DB7uchar dis=Disp_HC-SR04;uchar num=0123456789;uint distance;void delay(uint z)uint x,y;for(x=z;x0;x-)for(y=121;y0;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/58return 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;i12;i+)lcd_write_data(disi);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(numtemp/100);lcd_write_data(numtemp/10%10);lcd_write_data(numtemp%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);
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//超声波模块程序
//超声波模块程序
//Trig = P2^0
//Echo = P3^2
#include
#define uchar unsigned char
#define uint unsigned int
int time;
int succeed_flag;
uchar timeL;
uchar timeH;
sbit Trig=P1^0;
sbit Echo=P3^2;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f, 0x6f};
uchar code table1[]={0,1,2,3,4,5,6,7};
//
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
//
void delay_20us()
{
uchar a ;
for(a=0;a<100;a++);
}
//***************************************************************
//显示数据转换程序
void display(uint temp)
{
uchar ge,shi,bai;
bai=temp/100;
shi=(temp%100)/10;
ge=temp%10;
P2=table1[2];
P0=table[ge];
delay(1);
P2=table1[1];
P0=table[shi];
delay(1);
P2=table1[0];
P0=table[bai];
delay(1);
}
//***************************************************************
void main()
{
uint distance;
// test =0;
Trig=0; //首先拉低脉冲输入引脚
EA=1; //打开总中断0
TMOD=0x10; //定时器1，16位工作方式
while(1)
{
EA=0; //关总中断
Trig=1; //超声波输入端
delay_20us(); //延时20us
Trig=0; //产生一个20us的脉冲
while(Echo==0); //等待Echo回波引脚变高电平
succeed_flag=0; //清测量成功标志
EA=1;
EX0=1; //打开外部中断0
TH1=0; //定时器1清零
TL1=0; //定时器1清零
TF1=0; //计数溢出标志
TR1=1; //启动定时器1
delay(20); //等待测量的结果
TR1=0; //关闭定时器1
EX0=0; //关闭外部中断0
if(succeed_flag==1)
{
time=timeH*256+timeL;
distance=time*0.0172; //厘米
}
if(succeed_flag==0)
{
distance=0; //没有回波则清零
// test = !test; //测试灯变化
}
display(distance);
}
}
//***************************************************************
//外部中断0，用做判断回波电平
void exter() interrupt 0 // 外部中断0是0号
{
EX0=0; //关闭外部中断
timeH =TH1; //取出定时器的值
timeL =TL1; //取出定时器的值
succeed_flag=1;//至成功测量的标志
}
//****************************************************************
//定时器1中断,用做超声波测距计时
void timer1() interrupt 3 //
{
TH1=0;
TL1=0;
}
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);
}
}
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