DS18B20溫度測試程序（51單片機數(shù)碼管顯示）+電路圖下面是電路圖采用4位數(shù)碼管顯示程序一共有2個文件：,U1''■■mupnn^onPD.I.ftLH,U1''■■mupnn^onPD.I.ftLHPD^.DZ5aAL2pnaftDOPD.t'P.DiPDSftDSPD.SftDFRSTPD.T.^.DTpznvsPZ3P2W*1口PSENP23啊11ALEP2.4ft12國P2,Smi3P2SW14P2.TJft15pinP3IURXDP1.1P3.1ZTDCDP12陽副MIUP1.i陽加MT1P1.IPl.UTI]P1SpisxriP1EPlfiU'iIRP1.TP3.7.T!D*個***************************************ds18b20.h頭文件&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個#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*個************************************ds18b20.c文件&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個個#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延時，當delay=1時延時為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主文件個*個****************************************************************************#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