DS18B20 and ADC0832 are used together

#define  uchar  unsigned char
sbit DQ=P1^4;
volatile data temp_data[2]={0x00,0x00};
uchar data    display[5]={0x00,0x00,0x00,0x00,0x00};
unsigned char code  ditab[16] ={0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x04,
                                                          0x05,0x06,0x06,0x07,0x08,0x08,0x09,0x09} ;
//Common cathode digital tube
uchar code table[11] ={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00}; // 0,1,2,3,4,5, 6,7,8,9, hundreds digit or when the highest digit is 0, it will not be displayed
uchar code table1[10]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef}; // 0., 1., 2., 3., 4., 5., 6., 7., 8., 9. Each digit has a decimal point

    //The following is the water level display area
#define uchar unsigned char
#define uint unsigned int
#define long unsigned long
#define _rrca_() CY = ACC & 0x01 //Generate RRC A instruction
#define _rlca_() CY = ACC & 0x80 //Generate RLC A instruction
sbit bADcs=P1^7;
sbit bADcl=P1^6;
sbit bADda=P1^5;
sbit flag=P1^3;
//sbit str=P2^7;
//sbit d=P2^6;
//sbit clk=P2^5;
bit choose=0;
unsigned char data1;
unsigned char count;
unsigned char cycle;
uint ge,xiao1,xiao2;
unsigned long data2;
unsigned char  code tablewe[]=
{
 0xFE,0xFD,0xFB,0xF7,
 0xEF,0xDF,0xBF,0x7F
};//Written by myself
void delay_18b20(unsigned int i)
{
while(i--);
}
//Function area water level
void Delay(fly i)
 {
  while(--i);
 }
void ad(void)
{ fly i;
     //data1=0;
     bADcs = 0; //When ADC0832 is not working, its CS input should be high level, and the chip is disabled.
  bADcl=0;
  sea=1;
  bADcl=1;
  bADcl=0;//i down
  sea=1;
  bADcl=1;
  bADcl=0; //   2 down
  sea=0;
  bADcl=1;
  bADcl=0; //   3 down
  sea=1;
  bADcl=1;
  bADcl=0; //   4 down

  for(i=8;i>0;i--)
   {
  
   data1<<=1;
   bADcl=0;
  bADcl=1;
  if(bADda==1) data1|=0x01;
      sea=1;
   }
   bADcs=1;
 
}
void cal()
{
data2=((head)data1*493)/252.5;
ge=data2/100;
xiao1=(data2%100)/10;
xiao2=data2%10;

}

display2()
{
      P2=tablewe[4]; //P2 port low four bits selection
      P0=0x00; //P0 port digital tube segment selects the fifth digital tube and does not use it
   delay_18b20(50);

           P2=tablewe[5];
      P0=table1[ge];
   delay_18b20(50);
           P2=tablewe[6];
      P0=table[xiao1];
      delay_18b20(50);
           P2=tablewe[7];
     P0=table[xiao2];

 

}

//The above is the water level function

 


// Initialization function
Init_DS18B20(void)
{
unsigned char x=0;
DQ=1; //DQ reset
delay_18b20(8); //delay a little
DQ=0; //MCU pulls DQ low
delay_18b20(80); //Precise delay greater than 480us
DQ=1; //Pull the bus high
delay_18b20(14);
x=DQ; //After a short delay, if x=0, initialization is successful, if x=1, initialization fails
delay_18b20(20);
}

 


ReadOneChar(void)
{
unsigned char i=0;
unsigned char dat=0;

for(i=8;i>0;i--)
    {
      DQ=0; // Give pulse signal
      that>>=1;
      DQ=1; // Give pulse signal

      if(DQ)
       that|=0x80 ;
      delay_18b20(4) ;
    }

      return (that) ;
}

 [page]

WriteOneChar(unsigned char dat)
{
    unsigned char i=0;
    for(i=8;i>0;i--)
    {
      DQ=0;
      DQ=dat&0x01;
      delay_18b20(5);

      DQ=1;
      that>>=1;
    }
}

 

Read_Temperature(void)
{
       Heat_DS18B20() ;
 
       WriteOneChar(0xCC); // Skip the operation of reading the serial number and column number
       WriteOneChar(0x44); // Start temperature conversion

       Heat_DS18B20() ;
       WriteOneChar(0xCC); //Skip the operation of reading the serial number and column number
       WriteOneChar(0xBE); //Read temperature register
       temp_data[0] = ReadOneChar(); //lower 8 bits of temperature
       temp_data[1] = ReadOneChar(); //high 8 bits of temperature
}

 


Disp_Temperature()
{
    display[4]=temp_data[0]&0x0f;
    display[0]=ditab[display[4]]; //Look up the table to get the decimal value
 
    display[4]=((temp_data[0]&0xf0)>>4)|((temp_data[1]&0x0f)<<4);
    display[3]=display[4]/100 ;
    display[1]=display[4]%100 ;
    display[2]=display[1]/10;
    display[1]=display[1]%10;

     if(display[3]==0) //high bit is 0, not displayed
     {
       display[3]=10 ;            
       if(display[2]==0) //The second highest bit is 0, not displayed
       display[2]=10 ;
     }
}

display1()
{

      P2=tablewe[0]; //P2 port low four bits selection
      P0=table[display[3]]; //P0 port digital tube segment selection
   delay_18b20(50);

           P2=tablewe[1];
      P0=table[display[2]];
   delay_18b20(50);
           P2=tablewe[2];
      P0=table1[display[1]];
      delay_18b20(50);
           P2=tablewe[3];
     P0=table[display[0]];

}

void main()
{
   while(1)
    { Read_Temperature();
   Disp_Temperature();
 display1();
       ad();
          cal();
  display2();
   
    }
}

This program can be used, but it just can't display temperatures below zero. Please modify it!