msp430单片机的ds18b20测温度c程序

#include
#define DS18B20_DIRP2DIR
#define DS18B20_INP2IN
#define DS18B20_OUTP2OUT

#define DS18B20_DQBIT3//界说DS18B20的接口
#define DS18B20_DQ_2BIT4//界说另一个DS18B20的接口

// DS18B20 ROM指令宏界说
#define ReadRom0x33
#define MatchRom0x55
#define SearchRom0xf0
#define AlertSearch0xec
#define CopyScratchpad0x48
#define SkipRom0xcc
#define ReadPower0xb4

// DS18B20 功用指令宏界说
#define ConvertTemperature0x44
#define ReadScratchpad0xbe
#define WriteScratchpad0x4e
#define RecallE0xb8

#define SMCLK2000//(KHz)用于体系延时


// 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};

// 变量界说
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;//温度的实在值
float ResultTemperature_2;//温度的实在值
float Temperaturefromtwo;//温度的实在值差
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;//中止看门狗

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;
}
}