DS1302和DS18B20电路图程序分享

2018-7-19 09:12:24 1373 DS1302

#include"reg52.h"
#include"intrins.h"
#define uchar unsigned char
***it DIO=P3^0;
***it B7=B^7;
***it A0=ACC^0;
uchar tL,tH;
void delay(uchar us)
{
  while(us--);
}
bit init18b20()
{
bit w;
DIO=0;       //pull low
delay(145); //pull low 880us
DIO=1;       //pull High
delay(15); //pull High 90us
w=DIO;       //after read state
delay(90); //Not less than 480 us
return w;    //w=0,success,w=1,fail
}
uchar r18b20(void)
{
uchar i;
B=0;
for(i=0;i<8;i++)
{
B=B>>1;
DIO=0;
_nop_();  //pull low 2us
_nop_();  //12M nop 2 times,6M 1 time.
DIO=1; //pull high  read
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
B7=DIO; //after 15us ,read bit to B
delay(10); // 60us
   }
return B;
}
void w18b20(uchar dat)
{
uchar i;
for(i=0;i<8;i++)
   {
         DIO=0;
         _nop_();
         _nop_();
         DIO=dat & 0x01;
         delay(5);
         DIO=1;
         _nop_();
         dat=dat>>1;
   }
}
bit converT(void)
{
if(init18b20()==0)  //0 sucess
  {
   w18b20(0xcc);
w18b20(0x44);
return 1;
   }
else             //1 fail
return 0;
}
void readdata(void)
{
  uchar L***,M***;
if(init18b20()==0) //sucess
{
w18b20(0xcc);
w18b20(0xbe);
L***=r18b20();
M***=r18b20();
tL=L***;
tH=M***;
}
else
{
               tL=0;
tH=0;
}
}
void main()
{
uchar temp;
      while(1)
{
                  if(convert()==1)
{
                           readdata();
temp=(temp1<<4) | (temp0>>4);
if(temp1 & 0x08 )  //-
{
                                    P3=0x01;
P2=0x3F & (~temp)+1;
                              }
else                   //+
{
                                    P3=0xff;
                     P2=temp;
                              }
            }
         }
}

下面程序为分屏显示
#include"reg52.h"
#include"intrins.h"
#define uchar unsigned char
***it rs=P2^0;
***it rw=P2^1;
***it en=P2^2;
***it rst =P2^3;
***it sclk=P2^4;
***it DI  =P2^5;
***it ds18b20=P2^6;
***it A7=ACC^7;
***it A0=ACC^0;
***it B0=B^0;
uchar tt0[]="Time:";
uchar tt1[]="Data:";
uchar tt2[]="week:";
uchar tt3[]="temp:";
static char ch[7][3]={"Sun","Mon","Tue","Wed","Thu","Tri","Sat"};
unsigned char TT,temp1;
unsigned char temp2;
void delay(uchar us)
{
  while(us--);
}
bit Reset(void)
{
bit k;
ds18b20=0;
delay(145);
ds18b20=1;
delay(10);
k=ds18b20;
delay(90);
return k;
}
//---------------------------
unsigned char ReadByte(void)
{
unsigned char j,buf=0;
for(j=0;j<8;j++)
{
      buf=buf>>1;
      ds18b20=0;
      _nop_();
      _nop_();
      ds18b20=1;
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      if(ds18b20==1)
         buf|=0x80;
         delay(8);

   }
return buf;
}
//-------------------------------
void WriteByte(unsigned char dat)
{
unsigned char j;
for(j=0;j<8;j++)
   {
   if(dat&0x01)
      {
         ds18b20=0;
         _nop_();
         _nop_();
         ds18b20=1;
         delay(10);
      }
   else
      {
         ds18b20=0;
         delay(10);
         ds18b20=1;
         _nop_();
         _nop_();
      }
dat=dat>>1;
}
}
//------------------
bit Convert(void)
{
if(Reset()==0)
   {
      WriteByte(0xcc);
      WriteByte(0x44);
      return 1;
   }
else
{
return 0;
}

//---------------------------------------
void ReadFlash(void)
{
unsigned char L***,M***;
if(Reset()==0)
   {
      WriteByte(0xcc);
      WriteByte(0xbe);
      L***=ReadByte();
      M***=ReadByte();
      temp1=L***;
      temp2=M***;
   }
   else
   {
      temp1=0;
      temp2=0;
   }
}
void w1602(uchar dat,bit r)
{
rs=r;
rw=0;
P3=dat;
en=0;
delay(2);
en=1;
delay(4);
en=0;
}
void init1602()
{
      w1602(0x38,0);
w1602(0x06,0);
w1602(0x0c,0);
w1602(0x01,0);
}
uchar r1302(uchar addr)
{
      uchar n;
rst=0;
sclk=0;
_nop_();
rst=1;
B=addr;
for(n=0;n<8;n++)
{
sclk=0;
DI=B0;
sclk=1;
B=B>>1;
}
for(n=0;n<8;n++)
{
A7=DI;
sclk=1;
ACC=ACC>>1;
sclk=0;
}
rst=0;
return(ACC);
}
void main()
{
uchar i,n;
  unsigned int m;
init1602();
while(1)
{
      m=1500;
      while(m--)
      {
w1602(0x80,0);
for(i=0;i<5;i++)
w1602(tt0,1);
w1602(0x30+(r1302(0x85)>>4 & 0x0f),1);
w1602(0x30+(r1302(0x85) & 0x0f),1);
w1602(0x2d,1);
w1602(0x30+(r1302(0x83)>>4 & 0x0f),1);
w1602(0x30+(r1302(0x83) & 0x0f),1);
w1602(0x2d,1);
w1602(0x30+(r1302(0x81)>>4 & 0x0f),1);
w1602(0x30+(r1302(0x81) & 0x0f),1);

w1602(0xc0,0);
for(i=0;i<5;i++)
w1602(tt1,1);
w1602(0x30+(r1302(0x87)>>4 & 0x0f),1);
w1602(0x30+(r1302(0x87) & 0x0f),1);
w1602(0x2d,1);
w1602(0x30+(r1302(0x89)>>4 & 0x0f),1);
w1602(0x30+(r1302(0x89) & 0x0f),1);
w1602(0x2d,1);
w1602(0x30+(r1302(0x8d)>>4 & 0x0f),1);
w1602(0x30+(r1302(0x8d) & 0x0f),1);

}
w1602(0x01,0);

m=500;
      while(m--)
      {
if(Convert()==1)
            {
            ReadFlash();
            TT=(temp2<<4)|(temp1>>4);
            }
w1602(0x80,0);
for(i=0;i<5;i++)
w1602(tt2,1);
         for(n=0;n<3;n++)
w1602(ch[(r1302(0x8B) & 0x07)-1][n],1);

w1602(0xc0,0);
for(i=0;i<5;i++)
w1602(tt3,1);
if(temp2 & 0x80)
{
  w1602(0x2d,1);
            w1602(0x30+((~TT & 0x3f) +1)/10,1);
  w1602(0x30+((~TT & 0x3f) +1)%10,1);
         }
else
{
if(TT & 0x7F)
w1602(0x2b,1);
else
w1602(0x20,1);

  w1602(0x30+TT/10,1);
  w1602(0x30+TT%10,1);
}
}
w1602(0x01,0);
}
}