3_ds.h

51单片机同时读写3个ds18B20和一个SHT10

#include<reg52.h> //Microcontroller specific library, e.g. port definitions
#include <intrins.h> //Keil library (is used for _nop()_ operation)  
#include <math.h>    //Keil library  
#include <stdio.h>   //Keil library
#include <absacc.h>



typedef union 
{ unsigned int i;
  float f;
} value;

//----------------------------------------------------------------------------------
// modul-var
//----------------------------------------------------------------------------------
enum {TEMP,HUMI};

//#define	DATA   	P1_0
//#define	SCK   	P1_1

#define noACK 0
#define ACK   1
                            //adr  command  r/w
#define STATUS_REG_W 0x06   //000   0011    0
#define STATUS_REG_R 0x07   //000   0011    1
#define MEASURE_TEMP 0x03   //000   0001    1
#define MEASURE_HUMI 0x05   //000   0010    1
#define RESET        0x1e   //000   1111    0


#define uchar unsigned char 
#define uint unsigned int 

uchar tplsb,tpmsb;		// 温度值低位、高位字节 
uchar ds_num;

unsigned char xdata redata[8];	 
unsigned char xdata sedata[13];


//sbit DQ = P0^1;			// 数据通信线DQ

union{
	unsigned int  ds1_temp;   
 	unsigned char  ds1_t[2]; 

}ds1;

union{
	unsigned int  ds2_temp;   
 	unsigned char  ds2_t[2]; 

}ds2;

union{
	unsigned int  ds3_temp;   
 	unsigned char  ds3_t[2]; 

}ds3;


union{
	unsigned int  s_temp;   
 	unsigned char  s_t[2];

}s;

sbit DATA=P1^0;
sbit SCK=P1^1;
//sbit int485=P3^2;
//unsigned char *tm;

//unsigned int s_temph,s_templ,ds_temph,ds_templ;
//float s_tem;
//float xdata ds1_tem,ds2_tem,ds3_tem;