超声波测距离+DS18B20+1602显示

1、#include<reg52.h>#include <intrins.h>#define D 2#define T 30typedef unsigned char uchar;typedef unsigned int uint;sbit rs=P35;sbit rw=P36;sbit lcden=P37;sbit led = P13;sbit beep = P15;sbit Trig=P10; /超声波测速模块sbit Echo=P32;sbit DQ = P11;/DS18B20管脚 uchar *ch = "Hello world!"uchar

2、*message = "Welcom!"uchar *tishi = "Distance: m"uchar *tishi1 = "Temperture:"uchar *num = "0123456789."uchar succeed_flag,timeL,timeH,distance;uchar A1,A2,A3,A4,c;uint time;uchar a,b;/用于装载DS18b20数值void LedInit(void);void write_com(uchar com);void write_date(uc

3、har date);void Disp1Char(uchar x,uchar y,uchar ch);void DispNChar(uchar x,uchar y,uchar n,uchar *p);void LocateXY(uchar x,uchar y);void num_display(uint temp);void distance_display();void temp_display();void delay(uint num);void delay1(uint z);void delay_20us();void Init();void write(uchar com);ucha

4、r read();void read_tu();void main() LedInit();Init();/led = 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DispNChar(1,1,9,tishi);DispNChar(0,2,11,tishi1);/DispNChar(3,2,12,ch);while(1) temp_display();distance_display();void LedInit(void)lcden=0;rw = 0;write_com(0x38);write_com(0x0c);write_

5、com(0x06);write_com(0x01);write_com(0x80);void write_com(uchar com)rs=0;lcden=0;P0=com;delay1(5);lcden=1;delay1(5);lcden=0;void write_date(uchar date)rs=1;lcden=0;P0=date;delay1(5);lcden=1;delay1(5);lcden=0;void LocateXY(uchar x,uchar y) uchar temp; temp = x & 0x0f; if(y = 2) temp |= 0x40; temp

6、|= 0x80; write_com(temp);void Disp1Char(uchar x,uchar y,uchar ch)LocateXY(x,y);write_date(ch);void DispNChar(uchar x,uchar y,uchar n,uchar *p) uchar i; for(i=0;i<n;i+) Disp1Char(x+,y,pi); if(x = 0x0f) x = 0; y += 1; void num_display(uint temp) uchar a,b,c; a = temp/100; b = (temp%100)/10; c = tem

7、p%10; if(a >= D ) led = 0;else led = 1; Disp1Char(10,1,numa); Disp1Char(11,1,num10); Disp1Char(12,1,numb); Disp1Char(13,1,numc);void distance_display() EA = 0;Trig = 1;delay_20us();Trig = 0;while(Echo = 0);succeed_flag = 0;EA = 1;EX0 = 1;TH1 = 0;TL0 = 0;TF1 = 0;TR1 = 1;delay1(20);TR1 = 0;EX0 = 0;

8、if(succeed_flag = 1)time = timeH*256+timeL;distance = time/58;if(succeed_flag = 0)distance = 0;num_display(distance);/*以下部分为DS18b20模块程序*/void Init() DQ = 1;delay(8);DQ = 0;delay(90);DQ = 1;delay(100);DQ =1; void write(uchar com) uchar i; for(i=0;i<8;i+) DQ = 1; _nop_(); DQ = 0; DQ = com & 0x0

9、1; delay(5); DQ = 1; com >>= 1; uchar read()uchar i,dat;DQ = 1;_nop_();for(i=0;i<8;i+) DQ = 0;dat >>= 1;DQ = 1;if(DQ) dat |= 0x80;delay(30);DQ = 1;return dat;void read_tu() Init(); write(0xcc); write(0x44); Init(); write(0xcc); write(0xbe); a = read(); b = read();void temp_display() r

10、ead_tu();c = a & 0x0f; a = a & 0xf0; b <<= 4; b += a>>4; A1 = b/10%10; A2 = b%10; A3 = c/10; A4 = c%10; if(A1*10+A2) >= T) beep = 0; else beep = 1; Disp1Char(11,2,numA1); Disp1Char(12,2,numA2); Disp1Char(13,2,num10); Disp1Char(14,2,numA3); Disp1Char(15,2,numA4);void delay(uint num)/延时函数 while( -num );void delay1(uint z)uint x,y;for(x=z;x>0;x-)for(y=110;y&g