基于单片机的温度控制器的设计的程序.doc

#include#define uchar unsigned char#define uint unsigned intsbit DQ=P24;unsigned char flag; uchar code scan8=0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f;uchar code table13=0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x40,0x39,0x00;uchar code ditab16=0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x04,0x05,0x06,0x06,0x07,0x08,0x08,0x09,0x09;uchar dispbuf8;uchar temper2;/延时函数void delay（unsigned int us） while（us-）;/DS18B20复位void rest(void) ucha x=0; DQ=1; delay(8);DQ=0;delay(80);DQ=1;delay(20);/从DS18B20中读一个字节uchar readbyte(void) uchar i=0;uchar dat=0;for(i=8;i0;i+) DQ=0; Dat=1;DQ=1;if(DQ)dat|=0x08;delay(4);return(dat);/向DS18B20写void writebyte(unsigned char dat)uchar i=0;for(i=8;i0;i-) DQ=0; DQ=dat&0x01; delay(5);DQ=1;dat=1;delay(4);/向DS18B20读void readtemp(void) uchar a=0,b=0;reset();writebyte(0xCC);writebyte(0x44);reset();writebyte(0xCC);writebyte(0xBE);a=readbyte();b=readbyte();if(b0x0f) a=a+1; if(a=0)b=b+1;else b=b;flag=10;else flag=12;temper0=a&0x0f;a=a4;temper1=b4;temper1=temper1|a;/动态void scandisp() unsigned char i,value;for(i=0;i8;i+) P3=0xff;value=tabledispbufi;if(i= =3)value=0x80;P0=value;P3=scani;delay(50);/主函数void main() uchar temp,temp1;while(1) scandisp();readtemp();temp1=temper0;temp=temper1;dispbuf4=ditabtemp1;dispbuf1=temp/100;dispbuf