msp430单片机的ds18b20测温度c程序

#include
#define DS18B20_DIR P2DIR
#define DS18B20_IN P2IN
#define DS18B20_OUT P2OUT

#define DS18B20_DQ BIT3 //定义DS18B20的接口
#define DS18B20_DQ_2 BIT4 //定义另一个DS18B20的接口

// DS18B20 ROM命令宏定义
#define ReadRom 0x33
#define MatchRom 0x55
#define SearchRom 0xf0
#define AlertSearch 0xec
#define CopyScratchpad 0x48
#define SkipRom 0xcc
#define ReadPower 0xb4

// DS18B20 功能命令宏定义
#define ConvertTemperature 0x44
#define ReadScratchpad 0xbe
#define WriteScratchpad 0x4e
#define RecallE 0xb8

#define SMCLK 2000 //(KHz)用于系统延时


// 温度的十进制编码(查表用)
unsigned char decimalH[16]={00,06,12,18,25,31,37,43,50,56,62,68,75,81,87,93};
unsigned char decimalL[16]={00,25,50,75,00,25,50,75,00,25,50,75,00,25,50,75};

// 变量定义
unsigned char GetScratchpad[9];
unsigned char GetScratchpad_2[9];
float ResultTemperatureH; //温度的整数部分
float ResultTemperatureLH; //温度的小数部分(高位)
float ResultTemperatureLL; //温度的小数部分(低位)
float ResultTemperatureH_2; //温度的整数部分
float ResultTemperatureLH_2; //温度的小数部分(高位)
float ResultTemperatureLL_2; //温度的小数部分(低位)
float ResultTemperature; //温度的真实值
float ResultTemperature_2; //温度的真实值
float Temperaturefromtwo; //温度的真实值差
float OilPercentage; //油相含率

void DS18B20_WriteBit(unsigned char oww_dat);
void DS18B20_WriteBit_2(unsigned char oww_dat);
void DS18B20_WriteByte(unsigned char oww_dat);
void DS18B20_WriteByte_2(unsigned char oww_dat);
void DS18B20_ReadTemp(void);
void DS18B20_ReadTemp_2(void);
unsigned char DS18B20_Init(void);
unsigned char DS18B20_Init_2(void);
unsigned char DS18B20_ReadBit(void);
unsigned char DS18B20_ReadBit_2(void);
unsigned char DS18B20_ReadByte(void);
unsigned char DS18B20_ReadByte_2(void);
void Delay10us(void);
void DelayX10us(unsigned char x10us);


void main(void) {
volatile unsigned int i,j;
WDTCTL = WDTPW + WDTHOLD; //停止看门狗

BCSCTL1 &= ~XT2OFF; //XT2 = HF XTAL
do {
IFG1 &= ~OFIFG; //Clear OSCFault flag
for (i=0xFF;i>0;i--); //Time for flag to set
}while((IFG1&OFIFG)); //OSCFault flag still set?
BCSCTL2 |= (SELM1 + SELS); //MCLK = SMCLK = XT2

DS18B20_Init(); //初始化DS18B20
DS18B20_Init_2(); //初始化DS18B20.2

//Z7289_Init();

while(1) {
DS18B20_ReadTemp();
i=ResultTemperatureH/10;
j=ResultTemperatureH-(i*10);
//Z7289_Show(7,1,i);
//Z7289_Show(6,1,j);
//Z7289_Show(5,1,0x0C);
i=ResultTemperatureLH/10;
j=ResultTemperatureLH-(i*10);
//Z7289_Show(4,1,i);
//Z7289_Show(3,1,j);
i=ResultTemperatureLL/10;
j=ResultTemperatureLL-(i*10);
//Z7289_Show(2,1,i);
//Z7289_Show(1,1,j);
ResultTemperature=ResultTemperatureH+ResultTemperatureLH/100+ResultTemperatureLL/10000;
ResultTemperature_2=ResultTemperatureH_2+ResultTemperatureLH_2/100+ResultTemperatureLL_2/10000;
Temperaturefromtwo=ResultTemperature_2-ResultTemperature;
OilPercentage=1.6939-0.9260/Temperaturefromtwo;
}
}