51单片机超声波模块的C语言程序

1、/超声波模块程序 /超声波模块程序/Trig = P2A0/Echo = P3A2#include <reg52.h>#define uchar unsigned char#define uint unsigned intint time;int succeed_flag;uchar timeL;uchar timeH;sbit Trig=Pl A0;sbit Echo=P3A2;uchar codetable=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f;uchar code tablel=0,l,2,3,4,5,6,7;/v

2、oid 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=tablel2;PO=tablege;delay(l);P2=tablell;PO=tableshi;delay(l);P2=tablel0;PO=tablebai;dela

3、y(l);/ /*void main()uint distance;/ test =0;Trig=O; /首先拉低脉冲输入引脚TMOD=OxlO;/定时器1, 16位工作方式while(l)EA=O;/关总中断Trig= 1;/超声波输入端delay_20us(); /延时 20usTrig=O;/产生一个20us的脉冲while(Echo=0); /等待Echo回波引脚变高电平succeed_flag=O; /清测量成功标志EA=1;EXO=1;/打开外部中断0TH1=O;/定时器1清零TL1=O;/定时器1清零TF1=O;/计数溢出标志TR1 = 1;/启动定时器1delay(20);/等

4、待测量的结果TR1=O;/关闭定时器1EXO=O;/关闭外部中断0if(succeed_flag= 1)time=timeH*256+timeL;distance=time*O.0172; /厘米if(succeed_flag=O)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

5、时器1中断,用做超声波测距计时void timer 1() interrupt 3 / /TH1=O;TL1=O;1602液晶显示的超声波模块程序接口程序里边都有、#include<reg52 .h>/# includ e<d elay. h >#include < in trins. h>#define uchar unsigned char#define uint unsigned int sbit lcdrs=P2A3;sb辻 lcden=P2A2;sb辻trig=P2A0;/超声波发送/sbit echo=P3A2;/超声波接受/PODB0-DB7u

6、char dis=,Disp_HC-SR04n;uchar num=M0123456789"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;TRO=1;THO=O;TLO=O;uint HC_jisuan()uint dist,timer; timer=THO; timer<<=8;/晶振11.0592MHz距离timer=timer | TLO;dist=timer/53;cm=微秒 us/58return di

7、st;/I个机器周期是12个时钟周期 timer* 12/(58* 11.0592)=timer/53void HC_run()uint tempH=OxOO,tempL=OxOO;THO=O;TLO=O;trig=O;tri歹 1 ；delay(l);trig=O;while(THO-tempH!=O | |TLO- tempL!=O) | | (THO=O&&TLO=O)tempH=THO;tempL=TLO;delay(l);void lcd_write_com(uchar com) /LCD 写指令lcdrs=O;PO=com;delay(l);lcden=l;dela

8、y(l);lcden=O;void lcd_write_data(uchar date) /LCD 写数据lcdrs= 1;PO=date;delay(l);lcden=l;delay(l);lcden=O;void lcd_init() /LCD 初始化lcden=O;lcd_wr it e_com (0x38); lcd_wr it e_com (0x0 c); lcd_write_com(0x06); lcd_write_com(0x01);void lcd_display(uchar temp)uint i;lcd_wr it e_com (0x8 2);for(i=0;i<12

9、;i+)lcd_write_data(dis i);Icd_write_com(0x80+0x41); lcd_write_data('D')； lcd_write_data('i');lcd_wr it e_d ata (* s1); lcd_write_data('t')； lcd_wr 让 c_dQtQ(Q);1 c d_ wr i t e_d a t a (1 nr);lc d_wr i t e_d ata (1 c1; lcd_write_data(, e*); lcd_write_data(':'); lcd_write_data(numtemp/100); lcd_write_data(numtemp/10%10); lcd_write_data(numtemp% 10); lcd_wr 让 c_dQ