你有18b20的显示资料吗
#include#include#defineucharunsignedchar#defineuintunsignedintucharcodetab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff,0xbf,0x9c,0xc6};ucharf=0;sbitDQ=P1^7;//温度输入口sbitDIN=P0^7;//LED小数点控制sbitk1=P3^4;sbitk2=P3^5;sbitk3=P3^6;sbitk4=P3^7;sbitclk=P1^2;sbitdat=P1^1;sbitrst=P1^0;sbitA0=ACC^0;sbitA1=ACC^1;sbitA2=ACC^2;sbitA3=ACC^3;sbitA4=ACC^4;sbitA5=ACC^5;sbitA6=ACC^6;sbitA7=ACC^7;//*******温度小数部分用查表法**********//ucharcodetab1[16]={0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x04,0x05,0x06,0x06,0x07,0x08,0x08,0x09,0x09};uchardatatemp_data[2]={0x00,0x00};//读出温度低8位,高8位uchart0,t1,t2,t3,t4;//显示单元数据,共4个数据,t4运算暂存用/***********11微秒延时函数**********/voiddelay1(uintt){for(;t>0;t--);}/***********显示扫描函数**********/voidscan(){P0=tab[t3];P2_4=0;delay1(30);P2=0xff;P0=tab[t2];P2_5=0;delay1(30);P2=0xff;P0=tab[t1];DIN=0;P2_6=0;delay1(30);P2=0xff;P0=tab[t0];P2_7=0;delay1(30);P2=0xff;P0=tab[12];P2_0=0;delay1(30);P2=0xff;P0=tab[13];P2_1=0;delay1(30);P2=0xff;}/***********18B20复位函数**********/voidow_reset(void){charpresence=1;while(presence){while(presence){DQ=1;_nop_();_nop_();DQ=0;//delay1(50);//550usDQ=1;//delay1(6);//66uspresence=DQ;//presence=0继续下一步}delay1(45);//延时500uspresence=~DQ;}DQ=1;}/**********18B20写命令函数*********///向总线上写一个字节voidwrite_byte(ucharval){uchari;for(i=8;i>0;i--)//{DQ=1;_nop_();_nop_();DQ=0;_nop_();_nop_();_nop_();_nop_();_nop_();//5usDQ=val&0x01;//最低位移出delay1(6);//66usval=val/2;//右移一位}DQ=1;delay1(1);}/*********18B20读1个字节函数********///从总线上读取一个字节ucharread_byte(void){uchari;ucharvalue=0;for(i=8;i>0;i--){DQ=1;_nop_();_nop_();value>>=1;DQ=0;//_nop_();_nop_();_nop_();_nop_();//4usDQ=1;_nop_();_nop_();_nop_();_nop_();//4usif(DQ)value|=0x80;delay1(6);//66us}DQ=1;return(value);}/***********读出温度函数**********/voidread_temp(){ow_reset();//总线复位write_byte(0xCC);//发SkipROM命令write_byte(0xBE);//发读命令temp_data[0]=read_byte();//温度低8位temp_data[1]=read_byte();//温度高8位ow_reset();write_byte(0xCC);//SkipROMwrite_byte(0x44);//发转换命令}/***********温度数据处理函数**********/voidwork_temp(){ucharn=0;//if(temp_data[1]>127){temp_data[1]=(256-temp_data[1]);temp_data[0]=(256-temp_data[0]);n=1;}//负温度求补码t4=temp_data[0]&0x0f;t0=tab1[t4];//小数部分t4=((temp_data[0]&0xf0)>>4)|((temp_data[1]&0x0f)0;i--){dat=A0;clk=1;clk=0;ACC=ACC>>=1;}}//-------------------------------------------------------ucharOutputByte(void){uchari;dat=1;for(i=8;i>0;i--){ACC=ACC>>1;A7=dat;clk=1;clk=0;}return(ACC);}//--------------------------------------------------voidWrite(ucharaddr,ucharnum){rst=0;clk=0;rst=1;InputByte(addr);InputByte(num);clk=1;rst=0;}//-------------------------------------------------ucharRead(ucharaddr){uchardd=0;rst=0;clk=0;rst=1;InputByte(addr);dd=OutputByte();clk=1;rst=0;return(dd);}//--------------------------------------------------------------ucharReadSec(){uchardd;dd=Read(0x81);return(dd);}//--------------------------------------------------------------ucharReadMin(){uchardd;dd=Read(0x83);return(dd);}//--------------------------------------------------------------ucharReadHr(){uchardd;dd=Read(0x85);return(dd);}//------------------------------------------------------------ucharReadWe(){uchardd;dd=Read(0x8b);return(dd);}//------------------------------------------------------------ucharReadDay(){uchardd;dd=Read(0x87);return(dd);}//------------------------------------------------------------ucharReadMn(){uchardd;dd=Read(0x89);return(dd);}//------------------------------------------------------------ucharReadYs(){uchardd;dd=Read(0x8d);return(dd);}//------------------------------------------------------------voidWriteSec(ucharnum){Write(0x80,num);}//-----------------------------------------------------------voidWriteMin(ucharnum){Write(0x82,num);}//-----------------------------------------------------------voidWriteHr(ucharnum){Write(0x84,num);}//-----------------------------------------------------------voidWriteDay(ucharnum){Write(0x86,num);}//-----------------------------------------------------------voidWriteMn(ucharnum){Write(0x88,num);}//-----------------------------------------------------------voidWriteWe(ucharnum){Write(0x8a,num);}//-----------------------------------------------------------voidWriteYs(ucharnum){Write(0x8c,num);}//-----------------------------------------------------------voidDisableWP(void){Write(0x8e,0x00);}//----------------------------------------------------------voidEnableWP(void){Write(0x8e,0x80);}voiddelay(ucharm)//延时程序,延时m*0.5ms{uchari;ucharj;for(i=0;i>4)];P2_4=0;delay(3);P2_4=1;P0=tab[ReadHr()];P2_5=0;delay(3);P2_5=1;P0=tab[11];P2_6=0;delay(3);P2_6=1;P0=tab[(ReadMin()>>4)];P2_7=0;delay(3);P2_7=1;P0=tab[ReadMin()];P2_0=0;delay(3);P2_0=1;P0=tab[11];P2_1=0;delay(3);P2_1=1;P0=tab[(ReadSec()>>4)];P2_2=0;delay(3);P2_2=1;P0=tab[ReadSec()];P2_3=0;delay(3);P2_3=1;}voiddisplay2(){P0=tab[(ReadMn()>>4)];P2_4=0;delay(1);P2_4=1;P0=tab[ReadMn()];P2_5=0;delay(1);P2_5=1;P0=tab[11];P2_6=0;delay(1);P2_6=1;P0=tab[(ReadDay()>>4)];P2_7=0;delay(1);P2_7=1;P0=tab[ReadDay()];P2_0=0;delay(1);P2_0=1;P0=tab[10];P2_1=0;delay(1);P2_1=1;P0=tab[10];P2_2=0;delay(1);P2_2=1;P0=tab[ReadWe()];P2_3=0;delay(1);P2_3=1;}voidsettime(){if(k1==0){delay(30);if(k1==0){while(!k1);DisableWP();if(ReadHr()>=0x23){WriteHr(0x00);}else{if(ReadHr()>=9){WriteHr(ReadHr()7);}elseWriteHr(ReadHr()1);}}}if(k2==0){delay(30);if(k2==0){while(!k2);DisableWP();if(ReadHr()=0x59){WriteMin(0x00);}else{if(ReadMin()>=9){WriteMin(ReadMin()7);}elseWriteMin(ReadMin()1);}}}if(k4==0){delay(30);if(k4==0){while(!k4);DisableWP();WriteSec(0x00);if(ReadMin()<=0x00){WriteMin(0x59);}else{if(ReadMin()<=0){WriteMin(ReadMin()-7);}elseWriteMin(ReadMin()-1);}}}EnableWP();}voidmain(void){uinth;TMOD=0x01;TH0=0x3c;TL0=0xb0;TR0=1;EA=1;ET0=1;ow_reset();write_byte(0xCC);//SkipROMwrite_byte(0x44);//发转换命令while(1){settime();if(f==0)display1();if(f==1)display2();if(f==2){read_temp();//读出18B20温度数据work_temp();//处理温度数据for(h=0;h<500;h){scan();}//显示温度值1秒}}}voidtimer0()interrupt1{ucharn;TH0=0x3c;TL0=0xb0;n;if(n==80)f=1;if(n==110)f=2;if(n==140){n=0;f=0;}}