DS1820温度测量程序

 

#include <reg51.h>

#include <absacc.h>

#include <stdio.h>

#include <math.h>

#define uchar unsigned char

#define uint unsigned int

 

sbit P3_5=P3^5;

uchar TEMP;                                 // 温度值的变量；

uchar flag1;                                    // 结果为负和正的标志位。      

 

void delay (unsigned int count)

{                                   

    unsigned int i;

    while (count)  

    {

        i =200;

        while (i>0) i--;

        count--;

    }

}

 

void tmreset (void)                             // 发送复位和初始化

{

    unsigned int i;

    P3_5 = 0;  

    i = 103;

    while (i>0) i--;                                // 延时

    P3_5 = 1;