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#define MAX_DS1820 3           // maximum number of DS1820 devices connected to the 1 Wire bus
unsigned char ds1820_devices;  // number of DS1820 devices  connected to the 1 Wire bus
unsigned char ds1820_rom_codes[MAX_DS1820][9];// DS1820 devices ROM code storage area, 9 bytes are used for each device
...
ds1820_devices=w1_search(0xf0,ds1820_rom_codes);

unsigned char ds1820_rom_codes[9];

    char t1, t2, T;
    .....
    w1_init();   
    w1_write(0xCC);
    w1_write(0xBE);
 
    t1=w1_read();   //LSB     
    t2=w1_read();   //MSB
   
#ifdef DS18B20
    t2 = t2 << 4;   // DS18B20
    t1 = t1 >> 4;   // DS18B20
    T = (t2 & 0xF0) | (t1 & 0x0F);  // измеренная Т   // DS18B20
#endif   
   
     
#ifdef DS1820S
    t1 = t1 >> 1;   //DS1820S
    T = (t2 & 0b10000000) | (t1 & 0b01111111);  //измеренная Т DS1820S
#endif   

    if (T > 127) T = 0;

#include <lcd.h> // LCD driver routines
#include <ds18b20.h>
#include <delay.h>
#include <stdio.h>
#include <ds1820.h>
#asm
   .equ __w1_port=0x15 ;PORTC
   .equ __w1_bit=3
#endasm
#include <1wire.h>

#asm
   .equ __lcd_port=0x18 ;PORTB
#endasm
#include <lcd.h>






char lcd_buffer[33];

/* maximum number of DS18B20 connected to the 1 Wire bus */
#define MAX_DEVICES 8

/* DS18B20 devices ROM code storage area */
unsigned char rom_code[MAX_DEVICES][9];

void main()
{
unsigned char i,j,devices;

lcd_init(16);
lcd_putsf("CodeVisionAVR\n1 Wire Bus Demo");
delay_ms(2000);
lcd_clear();

/* detect how many DS18B20 devices
   are connected to the 1 Wire bus */
devices=w1_search(0xf0,rom_code);
sprintf(lcd_buffer,"%u DS18B20\nDevice detected",devices);
lcd_puts(lcd_buffer);
delay_ms(2000);

/* display the ROM codes for each device */
if (devices)
   {
   for (i=0;i<devices;i++)
       {
       sprintf(lcd_buffer,"Device #%u ROM\nCode is:",i+1);
       lcd_clear();
       lcd_puts(lcd_buffer);
       delay_ms(2000);
       lcd_clear();
       for (j=0;j<8;j++)
           {
           sprintf(lcd_buffer,"%02X ",rom_code[i][j]);
           lcd_puts(lcd_buffer);
           if (j==3) lcd_gotoxy(0,1);
           };
       delay_ms(5000);
       };
   }
else
while (1); /* stop here if no devices were found */

/* configure each DS18B20 device for 12 bit temperature
   measurement resolution */
for (i=0;i<devices;)
    if (!ds18b20_init(&rom_code[i++][0],20,30,DS18B20_12BIT_RES))
       {
       sprintf(lcd_buffer,"Init error for\ndevice #%u",i);
       lcd_clear();
       lcd_puts(lcd_buffer);
       while (1); /* stop here if init error */
       };

/* measure and display the temperature(s) */       
while (1)
      {
      j=1;
      for (i=0;i<devices;i++)
          {
          sprintf(lcd_buffer,"t%u=%+.3f\xdfC",j++,ds18b20_temperature(&rom_code[i][0]));
          lcd_clear();
          lcd_puts(lcd_buffer);
          delay_ms(500);
          };
      };
}