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#include<reg52.h>
sbit DSPORT=P3^7;
sbit A1=P1^0;
sbit B1=P1^1;
sbit C1=P1^2;
sbit D1=P1^3;
#define Coil_AB1 {A1=1;B1=1;C1=0;D1=0;}
#define Coil_BC1 {A1=0;B1=1;C1=1;D1=0;}
#define Coil_CD1 {A1=0;B1=0;C1=1;D1=1;}
#define Coil_DA1 {A1=1;B1=0;C1=0;D1=1;}
#define Coil_A1 {A1=1;B1=0;C1=0;D1=0;}
#define Coil_B1 {A1=0;B1=1;C1=0;D1=0;}
#define Coil_C1 {A1=0;B1=0;C1=1;D1=0;}
#define Coil_D1 {A1=0;B1=0;C1=0;D1=1;}
#define Coil_OFF {A1=0;B1=0;C1=0;D1=0;}
unsigned char Speed=2;
unsigned int DQ;
void Delay1ms(unsigned int y)
{
unsigned int x;
for(y;y>0;y--)
for(x=110;x>0;x--);
}
/*******************************************************************************
* ??? : Ds18b20Init
* ???? : ???
* ?? : ?
* ?? : ???????1,????0
*******************************************************************************/
unsigned char Ds18b20Init()
{
unsigned int i;
DSPORT=0; //?????480us~960us
i=70;
while(i--);//??642us
DSPORT=1; //??????,??DS18B20???????15us~60us?????
i=0;
while(DSPORT) //??DS18B20????
{
i++;
if(i>5000)//??>5MS
return 0;//?????
}
return 1;//?????
}
/*******************************************************************************
* ??? : Ds18b20WriteByte
* ???? : ?18B20??????
* ?? : com
* ?? : ?
*******************************************************************************/
void Ds18b20WriteByte(unsigned char dat)
{
unsigned int i,j;
for(j=0;j<8;j++)
{
DSPORT=0; //???????????????1us
i++;
DSPORT=dat&0x01; //????????,??????
i=6;
while(i--); //??68us,??????60us
DSPORT=1; //??????,??1us??????????????????
dat>>=1;
}
}
/*******************************************************************************
* ??? : Ds18b20ReadByte
* ???? : ??????
* ?? : com
* ?? : ?
*******************************************************************************/
unsigned char Ds18b20ReadByte()
{
unsigned char byte,bi;
unsigned int i,j;
for(j=8;j>0;j--)
{
DSPORT=0;//??????1us
i++;
DSPORT=1;//??????
i++;
i++;//??6us??????
bi=DSPORT; //????,????????
/*?byte????,??????7???bi,???????????0?*/
byte=(byte>>1)|(bi<<7);
i=4; //???????48us?????????
while(i--);
}
return byte;
}
/*******************************************************************************
* ??? : Ds18b20ChangTemp
* ???? : ?18b20??????
* ?? : com
* ?? : ?
*******************************************************************************/
void Ds18b20ChangTemp()
{
Ds18b20Init();
Delay1ms(1);
Ds18b20WriteByte(0xcc); //??ROM????
Ds18b20WriteByte(0x44); //??????
// Delay1ms(100); //??????,???????????,????????
}
/*******************************************************************************
* ??? : Ds18b20ReadTempCom
* ???? : ????????
* ?? : com
* ?? : ?
*******************************************************************************/
void Ds18b20ReadTempCom()
{
Ds18b20Init();
Delay1ms(1);
Ds18b20WriteByte(0xcc); //??ROM????
Ds18b20WriteByte(0xbe); //????????
}
/*******************************************************************************
* ??? : Ds18b20ReadTemp
* ???? : ????
* ?? : com
* ?? : ?
*******************************************************************************/
int Ds18b20ReadTemp()
{
int temp=0;
unsigned char tmh,tml;
Ds18b20ChangTemp(); //???????
Ds18b20ReadTempCom(); //????????????????
tml=Ds18b20ReadByte(); //??????16?,?????
tmh=Ds18b20ReadByte(); //?????
temp=tmh;
temp<<=8;
temp|=tml;
return temp;
}
void main()
{
unsigned int j,tp,i;
tp=Ds18b20ReadTemp;
Coil_OFF;
while(1)
{
if(tp>570)
{
Coil_A1
Delay1ms(Speed);
Coil_AB1
Delay1ms(Speed);
Coil_B1
Delay1ms(Speed);
Coil_BC1
Delay1ms(Speed);
Coil_C1
Delay1ms(Speed);
Coil_CD1
Delay1ms(Speed);
Coil_D1
Delay1ms(Speed);
Coil_DA1
Delay1ms(Speed);
for(i=0;i<100;i++)
{
Coil_A1
Delay1ms(Speed);
Coil_AB1
Delay1ms(Speed);
Coil_B1
Delay1ms(Speed);
Coil_BC1
Delay1ms(Speed);
Coil_C1
Delay1ms(Speed);
Coil_CD1
Delay1ms(Speed);
Coil_D1
Delay1ms(Speed);
Coil_DA1
Delay1ms(Speed);
Delay1ms(1);
}
for(j=0;j<6;j++)
{
Coil_OFF;
Delay1ms(100);
}
}
else
{
Coil_OFF;
Delay1ms(100);
}
}
}
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