51單片機燒錄，數碼管只顯示00

ID:516297 · 發表于 2019-4-19 13:17

本帖最后由 4564897 于 2019-4-19 20:19 編輯

#include  <REG52.H>
#define uchar unsigned char
#define uint unsigned int

sbit DATA=P1^2;
sbit weixuan=P1^6;
sbit duxuan=P1^5;
sbit SCL=P1^3;
sbit SDA=P1^4;

uchar bai,shi,ge;
uchar code seg7[]={0x3f,0x06,0x5b,0x4f,
               0x66,0x6d,0x7d,0x07,
               0x7f,0x6f,0x77,0x7c,
               0x39,0x5e,0x79,0x71};

void delay(uchar us)
{
while(us--);
}

void init_ds18b20()
{
  uchar init_resu;
  DATA=1;
  delay(10);
  DATA=0;
  delay(80);
  DATA=1;
  delay(20);
  init_resu=DATA;
  delay(30);
  DATA=1;
}

uchar readonechar()
{
  uchar i;
  uchar readresult;
  for(i=8;i>0;i--)
  {
   readresult>>=1;
   DATA=1;
   delay(1);
   DATA=0;
   delay(1);
   DATA=1;
   delay(1);
   if(DATA)
   readresult|=0x80;
   else
   readresult=0x7f;
   delay(8);
  }
  return readresult;
}

writeonechar(uchar dat)
{
  uchar i;
  for(i=8;i>0;i--)
  {
DATA=0;
delay(1);
DATA=dat&0x01;
delay(10);
DATA=1;
dat>>=1;
  }
  delay(8);
}

void display(uchar bai,uchar shi,uchar ge)
{
  weixuan=1;
  P0=0xfe;
  weixuan=0;
  P0=0xff;
  duxuan=1;
  P0=seg7[bai];
  duxuan=0;
  delay(30);

  weixuan=1;
  P0=0xfd;
  weixuan=0;
  P0=0xff;
  duxuan=1;
  //P0=(seg7[shi]|0x80);
  P0=seg7[shi];
  duxuan=0;
  delay(30);

  weixuan=1;
  P0=0xfb;
  weixuan=0;
  P0=0xff;
  duxuan=1;
  P0=seg7[ge];
  duxuan=0;
  delay(30);

}

int readtemp()
{
  uchar a,b;
  int t;
  float tt;
  init_ds18b20();
  writeonechar(0xcc);
  writeonechar(0x44);
  init_ds18b20();
  writeonechar(0xcc);
  writeonechar(0xbe);
  a=readonechar();
  b=readonechar();
  t=b;
  t<<=8;
  t|=a;
  tt=t*0.0625;
  t=tt*10+0.5;
  return t;
}

void startlic()
{
  SDA=1;
  delay(1);
  SCL=1;
  delay(1);
  SDA=0;
  delay(1);
}

void stoplic()
{
  SDA=0;
  delay(1);
  SCL=1;
  delay(1);
  SDA=1;
  delay(1);
}

void responselic()
{
uchar i;
SCL=1;
delay(1);
while((SDA==1)&&(i<200))
i++;
SCL=0;
delay(1);
}

void lnitlic()
{
  SDA=1;
  delay(1);
  SCL=1;
  delay(1);
}

void write_bytelic(uchar date)
{
uchar i,temp;
temp=date;
for(i=0;i<8;i++)
{
   temp<<=1;
   SCL=0;
   delay(1);
   SDA=CY;
   delay(1);
   SCL=1;
   delay(1);
}
SCL=0;
delay(1);
SDA=1;
delay(1);
}

void writeaddressdatelic(uchar address,uchar date)
{
  startlic();
  write_bytelic(0xa0);
  responselic();
  write_bytelic(address);
  responselic();
  write_bytelic(date);
  responselic();
  stoplic();
}

void main()
{
  int temp;
  lnitlic();
  while(1)
  {
display(bai,shi,ge);
temp=readtemp();
bai=temp%1000/100;
shi=temp%100/10;
ge=temp%10;
display(bai,shi,ge);
  }
}

ID:1 · 發表于 2019-4-19 16:23

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51單片機燒錄，數碼管只顯示00