单总线DS18B20多点温度测量与显示

#include <reg52.h>
#include <ABSACC.h>
#include <intrins.h>
#include <stdio.h>
#define uint unsigned int
#define uchar unsigned char
//
#define num_ds18b20 2//温度传感器的个数
//----------------------------------------------------------------------------------------------------------------
uchar data temp_data[4]={0x00,0x00,0x00,0x00};//0-1第1组温度的THTL值，2-3第2组温度的THTL值
uchar data add1[]={0x01,0x00,0x00,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
//0-7第一组温度传感器的地址，8-15第二组温度传感器的地址
uchar dispaly[15];
uchar i,j,k;
//-------------------------------------------------数码管段码--------------------------------------------------------
uchar seg[10]={0xC0,0xCF,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};         //0~~9段码
uchar seg1[10]={0x40,0x4F,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10}; 

//-----------------------------------------------DS1820数据IO-----------------------------------------------------
sbit      DQ=P3^5;
//-----------------------------------------------数码管位选--------------------------------------------------------
sbit hc138a=P2^0;
sbit hc138b=P2^1;
sbit hc138c=P2^2;
//sbit led0=P2^3;

sbit BELL=P3^6;
//-----------------------------------------------函数申明---------------------------------------------------------
void delay1(uint i);
void ds_reset(void);

void write_byte(uchar value);
uchar read_byte(void);
void read_temp();
void work_temp();

//----------------------------------------------------------------------------------------------------------------
void delay1(uint i)
{
for(;i>0;i--);   
}
//-----------------------------------------------------------DS1820复位函数---------------------------------------
void ds_reset(void)
{
char temp=1;
while(temp)
{
 while(temp)
{
    DQ=1;_nop_();_nop_();
DQ=0;
delay1(80);
DQ=1;
delay1(9);
temp=DQ;
  } 
   delay1(64);
  temp=~DQ;  
}
DQ=1;
 }