51单片机温度传感器程序

51单片机温度传感器程序
#include#defineucharunsignedchar#defineuintunsignedintsbitled=P2^5;sbitwei=P2^7;sbitduan=P2^6;sbitDQ=P2^2;ucharmazhi_duan[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};ucharmazhi_wei[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xff};voiddelayl(uintn){uinti,j;for(i=n;i＞0;i--)for(j=114;j＞0;j--);}voiddelays(uchari){while(i--);}bitinit_DS18B20()//DS8B20初始化{bitx;DQ=1;//DQ复位delays(8);DQ=0;//单片机将DQ拉低delays(75);DQ=1;//拉高总线delays(15);x=DQ;//延时过后若x=0则初始化成功若x=1则初始化失败delays(5);returnx;}voidwrite_data(uchardat){uchari,temp;temp=dat;DQ=1;for(i=0;i＞=1;}}ucharread_data(){uchari,dat;DQ=1;for(i=0;i＞=1;DQ=1;//配置为输入if(DQ)dat|=0x80;delays(4);}returndat;}uintreadtemp(){uchartemph,templ;uinttemp;floatwendu;init_DS18B20();write_data(0xcc);//跳过ROMwrite_data(0x44);//启动温度转换//delayl(100);init_DS18B20();write_data(0xcc);//跳过ROMwrite_data(0xBE);//读温度//以下读温度，低八位在前//高8位在后templ=read_data();temph=read_data();temp=(temph＜＜8)|templ;wendu=temp*0.625+0.5;//温度扩大10倍，四舍五入temp=wendu;//10倍温度returntemp;}voidSTC_init(){P1=0x00;//关闭ledled=0;//锁存wei=0;duan=0;}voiddisplay(ucharweil,ucharduanl,bitdp){wei=1;P0=mazhi_wei[weil-1];wei=0;duan=1;if(dp==1)P0=(mazhi_duan[duanl]|0x80);elseP0=mazhi_duan[duanl];duan=0;}voidmain(){uchari;uintwendu;STC_init();wendu=readtemp();delayl(500);wendu=readtemp();delayl(500);while(1){wendu=readtemp();for(i=0;i＜80;i++){display(1,wendu/100,0);delayl(3);display(2,wendu0/10,1);delayl(3);display(3,wendu,0);delayl(3);}}} 本软件ID:4663783