DS18B20温度测试程序51单片机数码管显示+电路图

DS18B20温度测试程序（51单片机数码管显示）+电路图下面是电路图采用4位数码管显示程序一共有2个文件：,U1''■■mupnn^onPD.I.ftLH,U1''■■mupnn^onPD.I.ftLHPD^.DZ5aAL2pnaftDOPD.t'P.DiPDSftDSPD.SftDFRSTPD.T.^.DTpznvsPZ3P2W*1口PSENP23啊11ALEP2.4ft12国P2,Smi3P2SW14P2.TJft15pinP3IURXDP1.1P3.1ZTDCDP12阳副MIUP1.i阳加MT1P1.IPl.UTI]P1SpisxriP1EPlfiU'iIRP1.TP3.7.T!D*个***************************************ds18b20.h头文件&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个#ifndef_DS18B20_H_#define_DS18B20_H_#include<reg51.h>#defineledP1#defineledwP2externunsignedcharf;externvoidds18b20_reset();externvoiddela(unsignedchari);externvoidds18b20_write(unsignedchardat);externunsignedchards18b20_read();externunsignedchards18b20_temp();externunsignedcharledtab口；#endif*个************************************ds18b20.c文件&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个个#include〃ds18b20.h”#defineucharunsignedchar#defineuintunsignedint#defineledP1#defineledwP2ucharledtab口:{0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};sbitdq=P3"7;uchardelay,f;//ucharf;voiddela(uchari)//5us t=5+i*2{while(--i);)voidds18b20_reset(){while(1){dq=1;dq=0;delay=250;//540us延时，当delay=1时延时为2us,T=2*xwhile(--delay);dq=1;delay=25;while(--delay);while(dq==0){delay=220;while(--delay);if(dq==1)break;)delay=150;while(--delay);break;))voidds18b20_write(uchardat){uchari=0;for(i=0;i<8;i++){dq=1;dq=0;delay=3;while(--delay);dq=dat&0x01;delay=35;while(--delay);dq=1;dat=dat>>1;))uchards18b20_read(){uchari=0,m=0;for(i=0;i<8;i++){//m>>=1dq=1;dq=0;delay=4;while(--delay);dq=1;delay=4;while(--delay);if(dq==1)m|=0x01<<i;//m=m|0x80;delay=25;while(--delay);dq=1;delay=1;while(--delay);)returnm;)uchards18b20_temp(){uchartemp=0,temph=0,templ=0,k=0;ds18b20_reset();ds18b20_write(0xcc);ds18b20_write(0x44);ds18b20_reset();ds18b20_write(0xcc);ds18b20_write(0xbe);templ=ds18b20_read();temph=ds18b20_read();if((temph&0xf80)!=0){f=1;templ=~templ;temph=~temph;k=templ+1;templ=k;if(templ>0xff){temph++;))elsef=0;templ=templ>>4;temph=temph<<4;temp=templ|temph;returntemp;)************************************main.c主文件个*个****************************************************************************#include<reg51.h>#include〃ds18b20.h”#defineucharunsignedcharvoidmain(){uchara=0,b=0,c=0,temp=0;while(1){temp=ds18b20_temp();a=temp/100;b=temp0/10;c=temp;if(f==1){led=0xbf;ledw=1;dela(5000);ledw=0;dela(600);)led=ledtab[c