#include"reg52.h"#define uchar unsigned char#define uint unsigned intsbit DQ=P3^4;        //溫度數(shù)據(jù)口sbit wx1=P2^0;       //位選1sbit wx2=P2^1;       //位選2sbit wx3=P2^2;       //位選3sbit wx4=P2^3;       //位選4unsigned int temp, temp1,temp2, xs;uchar code table[]={0xc0,0xf9,0xa4,0xb0,0x99,                //共陽(yáng)數(shù)碼管0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6};/******延時(shí)程序*******/void delay1(unsigned int m){unsigned int i,j;for(i=m;i>0;i--)for(j=110;j>0;j--);}void delay(unsigned int m)     //溫度延時(shí)程序{while(m--);}void Init_DS18B20() {unsigned char x=0;DQ = 1;          //DQ復(fù)位 ds18b20通信端口delay(8); //稍做延時(shí)DQ = 0;          //單片機(jī)將DQ拉低delay(80); //精確延時(shí) 大于 480usDQ = 1;          //拉高總線  delay(4);x=DQ;            //稍做延時(shí)后 如果x=0則初始化成功 x=1則初始化失敗delay(20);}
				
            

				
					
					
				
			
                
			
							

                
			            

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