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[SOLVED] DS1820(Temp.Sensor) with ATMEGA32A Problem

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panda1234

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Hi,
I tried to sense temp. with this sensor and my program work fine in proteus but in real on LCD shows:
-9999.000000!
Is there any difference between ds1820 and ds18b20?
 
Last edited:

Hi,

did you read AppNote 162?
Maybe there are some informations.

Schematics and code woud be helpful.

Klaus
 

This is my Code:
PHP: 
/*******************************************************
This program was created by the
CodeWizardAVR V3.12 Advanced
Automatic Program Generator
© Copyright 1998-2014 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com

Project : 
Version : 
Date    : 7/9/2015
Author  : 
Company : 
Comments: 


Chip type               : ATmega32A
Program type            : Application
AVR Core Clock frequency: 8.000000 MHz
Memory model            : Small
External RAM size       : 0
Data Stack size         : 512
*******************************************************/

#include <mega32a.h>
#include <delay.h>
#include <stdio.h>
// 1 Wire Bus interface functions
#include <1wire.h>

// DS1820 Temperature Sensor functions
#include <ds1820.h>

// Alphanumeric LCD functions
#include <alcd.h>
char buffer[20];
float temp=0.0;
// Declare your global variables here

void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRA=(0<<DDA7) | (0<<DDA6) | (0<<DDA5) | (0<<DDA4) | (0<<DDA3) | (0<<DDA2) | (0<<DDA1) | (0<<DDA0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTA=(0<<PORTA7) | (0<<PORTA6) | (0<<PORTA5) | (0<<PORTA4) | (0<<PORTA3) | (0<<PORTA2) | (0<<PORTA1) | (0<<PORTA0);

// Port B initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRB=(0<<DDB7) | (0<<DDB6) | (0<<DDB5) | (0<<DDB4) | (0<<DDB3) | (0<<DDB2) | (0<<DDB1) | (0<<DDB0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTB=(0<<PORTB7) | (0<<PORTB6) | (0<<PORTB5) | (0<<PORTB4) | (0<<PORTB3) | (0<<PORTB2) | (0<<PORTB1) | (0<<PORTB0);

// Port C initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRC=(0<<DDC7) | (0<<DDC6) | (0<<DDC5) | (0<<DDC4) | (0<<DDC3) | (0<<DDC2) | (0<<DDC1) | (0<<DDC0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTC=(0<<PORTC7) | (0<<PORTC6) | (0<<PORTC5) | (0<<PORTC4) | (0<<PORTC3) | (0<<PORTC2) | (0<<PORTC1) | (0<<PORTC0);

// Port D initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRD=(0<<DDD7) | (0<<DDD6) | (0<<DDD5) | (0<<DDD4) | (0<<DDD3) | (0<<DDD2) | (0<<DDD1) | (0<<DDD0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTD=(0<<PORTD7) | (0<<PORTD6) | (0<<PORTD5) | (0<<PORTD4) | (0<<PORTD3) | (0<<PORTD2) | (0<<PORTD1) | (0<<PORTD0);

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=0xFF
// OC0 output: Disconnected
TCCR0=(0<<WGM00) | (0<<COM01) | (0<<COM00) | (0<<WGM01) | (0<<CS02) | (0<<CS01) | (0<<CS00);
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=0xFFFF
// OC1A output: Disconnected
// OC1B output: Disconnected
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=(0<<COM1A1) | (0<<COM1A0) | (0<<COM1B1) | (0<<COM1B0) | (0<<WGM11) | (0<<WGM10);
TCCR1B=(0<<ICNC1) | (0<<ICES1) | (0<<WGM13) | (0<<WGM12) | (0<<CS12) | (0<<CS11) | (0<<CS10);
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer2 Stopped
// Mode: Normal top=0xFF
// OC2 output: Disconnected
ASSR=0<<AS2;
TCCR2=(0<<PWM2) | (0<<COM21) | (0<<COM20) | (0<<CTC2) | (0<<CS22) | (0<<CS21) | (0<<CS20);
TCNT2=0x00;
OCR2=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=(0<<OCIE2) | (0<<TOIE2) | (0<<TICIE1) | (0<<OCIE1A) | (0<<OCIE1B) | (0<<TOIE1) | (0<<OCIE0) | (0<<TOIE0);

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=(0<<ISC11) | (0<<ISC10) | (0<<ISC01) | (0<<ISC00);
MCUCSR=(0<<ISC2);

// USART initialization
// USART disabled
UCSRB=(0<<RXCIE) | (0<<TXCIE) | (0<<UDRIE) | (0<<RXEN) | (0<<TXEN) | (0<<UCSZ2) | (0<<RXB8) | (0<<TXB8);

// Analog Comparator initialization
// Analog Comparator: Off
// The Analog Comparator's positive input is
// connected to the AIN0 pin
// The Analog Comparator's negative input is
// connected to the AIN1 pin
ACSR=(1<<ACD) | (0<<ACBG) | (0<<ACO) | (0<<ACI) | (0<<ACIE) | (0<<ACIC) | (0<<ACIS1) | (0<<ACIS0);
SFIOR=(0<<ACME);

// ADC initialization
// ADC disabled
ADCSRA=(0<<ADEN) | (0<<ADSC) | (0<<ADATE) | (0<<ADIF) | (0<<ADIE) | (0<<ADPS2) | (0<<ADPS1) | (0<<ADPS0);

// SPI initialization
// SPI disabled
SPCR=(0<<SPIE) | (0<<SPE) | (0<<DORD) | (0<<MSTR) | (0<<CPOL) | (0<<CPHA) | (0<<SPR1) | (0<<SPR0);

// TWI initialization
// TWI disabled
TWCR=(0<<TWEA) | (0<<TWSTA) | (0<<TWSTO) | (0<<TWEN) | (0<<TWIE);

// 1 Wire Bus initialization
// 1 Wire Data port: PORTA
// 1 Wire Data bit: 0
// Note: 1 Wire port settings are specified in the
// Project|Configure|C Compiler|Libraries|1 Wire menu.
w1_init();

// Alphanumeric LCD initialization
// Connections are specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS - PORTC Bit 0
// RD - PORTC Bit 1
// EN - PORTC Bit 2
// D4 - PORTC Bit 4
// D5 - PORTC Bit 5
// D6 - PORTC Bit 6
// D7 - PORTC Bit 7
// Characters/line: 16
lcd_init(16);
 lcd_gotoxy(0,0);
 lcd_puts("Welcome");
 delay_ms(1000);
 lcd_clear();
while (1)
      {
      // Place your code here
     temp=ds1820_temperature_10(0);
     sprintf(buffer,"Temp: %f",temp);
     lcd_gotoxy(0,0);
     lcd_puts(buffer);
          delay_ms(500);
      
      }
}
 

Hi,

temp=ds1820_temperature_10(0);
Click to expand...
This is a fuction call. But the function code is not here. Are you sure the function works fine?

Klaus
 

Here is library of DS1820:
PHP: 
/*
  CodeVisionAVR C Compiler
  (C) 1998-2005 Pavel Haiduc, HP InfoTech S.R.L.

  Dallas Semiconductor DS1820 1 Wire bus temperature sensor functions
*/

#include <delay.h>
#include <ds1820.h>

struct __ds1820_scratch_pad_struct __ds1820_scratch_pad;
       
unsigned char ds1820_select(unsigned char *addr)
{
unsigned char i;
if (w1_init()==0) return 0;
if (addr)
   {
   w1_write(0x55);
   i=0;
   do
     w1_write(*(addr++));
   while (++i<8);
   }
else w1_write(0xcc);
return 1;
}

unsigned char ds1820_read_spd(unsigned char *addr)
{
unsigned char i;
unsigned char *p;
if (ds1820_select(addr)==0) return 0;
w1_write(0xbe);
i=0;
p=(char *) &__ds1820_scratch_pad;
do
  *(p++)=w1_read();
while (++i<9);
return !w1_dow_crc8(&__ds1820_scratch_pad,9);
}

int ds1820_temperature_10(unsigned char *addr)
{
if (ds1820_select(addr)==0) return -9999;
w1_write(0x44);
delay_ms(550);
if (ds1820_read_spd(addr)==0) return -9999;
w1_init();
return (((int)__ds1820_scratch_pad.temp_msb<<8)|
       __ds1820_scratch_pad.temp_lsb)*5;
}

unsigned char ds1820_set_alarm(unsigned char *addr,signed char temp_low,signed char temp_high)
{
if (ds1820_select(addr)==0) return 0;
w1_write(0x4e);
w1_write(temp_high);
w1_write(temp_low);
if (ds1820_read_spd(addr)==0) return 0;
if ((__ds1820_scratch_pad.temp_low!=temp_low) ||
   (__ds1820_scratch_pad.temp_high!=temp_high)) return 0;
if (ds1820_select(addr)==0) return 0;
w1_write(0x48);
delay_ms(15);
return w1_init();
}

- - - Updated - - -

In first i used ds18b20 library and simulation worked fine but in real didn't!Then i tried to use ds1820 library but this isn't work in simulation.
 

Hi,

LCD shows:-9999.000000!
Click to expand...

if (ds1820_select(addr)==0) return -9999;
w1_write(0x44);
delay_ms(550);
if (ds1820_read_spd(addr)==0) return -9999;
w1_init();
Click to expand...

"-9999" seems to be the error code
there are two error conditions... try to find out wich one raises the error.

Klaus

Klaus
 

I tried but didn't find my error!
 

Hi,

Code: 
ds1820_select(addr)
What does this do?

Code: 
ds1820_read_spd(addr)
What does this do?

Klaus
 

I think if you want to use more than one DS1820 with one wire you should select one of them and for this you can use:
ds1820_select(addr)
and for read_spd this is in codevision help:
Code: 
unsigned char ds1820_read_spd(unsigned char *addr)


      this function reads the contents of the SPD for the DS1820/DS18S20 sensor with the ROM code stored in an array of 8 bytes located at address addr.
The functions returns the value 1 on succes and 0 in case of error.
If only one DS1820/DS18S20 sensor is used, no ROM code array is necessary and the pointer addr must be NULL (0).
The contents of the SPD will be stored in the structure:

I write another program but still not work it shows 0 on LCD.
PHP: 
#include <mega32.h>
#include <delay.h>
#include <stdio.h>
#include <math.h>
// 1 Wire Bus functions
#include <1wire.h>
// DS1820 Temperature Sensor functions
#include <ds1820.h>
// maximum number of DS1820 devices
// connected to the 1 Wire bus
#define MAX_DS1820 2
// number of DS1820 devices
// connected to the 1 Wire bus
unsigned char ds1820_devices;
// DS1820 devices ROM code storage area,
// 9 bytes are used for each device

unsigned char rom_codes[MAX_DS1820][9];
unsigned char i;
#asm
   .equ __lcd_port=0x15 ;PORTA
#endasm
#include <lcd.h>
void main(void)
{
char lcd_array[16];

PORTA=0x00;
DDRA=0x00;

PORTC=0x00;
DDRC=0x00;

ds1820_devices=w1_search(0xf0,rom_codes);
lcd_init(16);
for (i=0;i<ds1820_devices;i++)
    {
    sprintf(lcd_array,"INIT DEVICE #%-u ",i+1); 
    lcd_clear();
    lcd_puts(lcd_array); 
    lcd_gotoxy(0,1);
       delay_ms(1000);
    }   
lcd_clear();
while (1)
      {        
            
                  sprintf(lcd_array,"%f",ds1820_temperature_10(&rom_codes[0][0]));      //celsius
                  lcd_gotoxy(0,0);    
                  lcd_puts(lcd_array);  
                  
                      
      }; 
      };
 

This is final code:
PHP: 
/*******************************************************
This program was created by the
CodeWizardAVR V3.12 Advanced
Automatic Program Generator
© Copyright 1998-2014 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com

Project : 
Version : 
Date    : 7/12/2015
Author  : 
Company : 
Comments: 


Chip type               : ATmega32A
Program type            : Application
AVR Core Clock frequency: 8.000000 MHz
Memory model            : Small
External RAM size       : 0
Data Stack size         : 512
*******************************************************/

#include <mega32a.h>

// 1 Wire Bus interface functions
#include <1wire.h>

// DS1820 Temperature Sensor functions
#include <ds1820.h>

// Alphanumeric LCD functions
#include <alcd.h>
#include <stdio.h>
#include <delay.h>
unsigned char rom_codes[2][9];
int point=0;
int baghie=0;
char buffer[20];
int temp=10;
// Declare your global variables here
unsigned char ds1820_devices;
void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRA=(0<<DDA7) | (0<<DDA6) | (0<<DDA5) | (0<<DDA4) | (0<<DDA3) | (0<<DDA2) | (0<<DDA1) | (0<<DDA0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTA=(0<<PORTA7) | (0<<PORTA6) | (0<<PORTA5) | (0<<PORTA4) | (0<<PORTA3) | (0<<PORTA2) | (0<<PORTA1) | (0<<PORTA0);

// Port B initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRB=(0<<DDB7) | (0<<DDB6) | (0<<DDB5) | (0<<DDB4) | (0<<DDB3) | (0<<DDB2) | (0<<DDB1) | (0<<DDB0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTB=(0<<PORTB7) | (0<<PORTB6) | (0<<PORTB5) | (0<<PORTB4) | (0<<PORTB3) | (0<<PORTB2) | (0<<PORTB1) | (0<<PORTB0);

// Port C initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRC=(0<<DDC7) | (0<<DDC6) | (0<<DDC5) | (0<<DDC4) | (0<<DDC3) | (0<<DDC2) | (0<<DDC1) | (0<<DDC0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTC=(0<<PORTC7) | (0<<PORTC6) | (0<<PORTC5) | (0<<PORTC4) | (0<<PORTC3) | (0<<PORTC2) | (0<<PORTC1) | (0<<PORTC0);

// Port D initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRD=(0<<DDD7) | (0<<DDD6) | (0<<DDD5) | (0<<DDD4) | (0<<DDD3) | (0<<DDD2) | (0<<DDD1) | (0<<DDD0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTD=(0<<PORTD7) | (0<<PORTD6) | (0<<PORTD5) | (0<<PORTD4) | (0<<PORTD3) | (0<<PORTD2) | (0<<PORTD1) | (0<<PORTD0);

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=0xFF
// OC0 output: Disconnected
TCCR0=(0<<WGM00) | (0<<COM01) | (0<<COM00) | (0<<WGM01) | (0<<CS02) | (0<<CS01) | (0<<CS00);
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=0xFFFF
// OC1A output: Disconnected
// OC1B output: Disconnected
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=(0<<COM1A1) | (0<<COM1A0) | (0<<COM1B1) | (0<<COM1B0) | (0<<WGM11) | (0<<WGM10);
TCCR1B=(0<<ICNC1) | (0<<ICES1) | (0<<WGM13) | (0<<WGM12) | (0<<CS12) | (0<<CS11) | (0<<CS10);
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer2 Stopped
// Mode: Normal top=0xFF
// OC2 output: Disconnected
ASSR=0<<AS2;
TCCR2=(0<<PWM2) | (0<<COM21) | (0<<COM20) | (0<<CTC2) | (0<<CS22) | (0<<CS21) | (0<<CS20);
TCNT2=0x00;
OCR2=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=(0<<OCIE2) | (0<<TOIE2) | (0<<TICIE1) | (0<<OCIE1A) | (0<<OCIE1B) | (0<<TOIE1) | (0<<OCIE0) | (0<<TOIE0);

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=(0<<ISC11) | (0<<ISC10) | (0<<ISC01) | (0<<ISC00);
MCUCSR=(0<<ISC2);

// USART initialization
// USART disabled
UCSRB=(0<<RXCIE) | (0<<TXCIE) | (0<<UDRIE) | (0<<RXEN) | (0<<TXEN) | (0<<UCSZ2) | (0<<RXB8) | (0<<TXB8);

// Analog Comparator initialization
// Analog Comparator: Off
// The Analog Comparator's positive input is
// connected to the AIN0 pin
// The Analog Comparator's negative input is
// connected to the AIN1 pin
ACSR=(1<<ACD) | (0<<ACBG) | (0<<ACO) | (0<<ACI) | (0<<ACIE) | (0<<ACIC) | (0<<ACIS1) | (0<<ACIS0);
SFIOR=(0<<ACME);

// ADC initialization
// ADC disabled
ADCSRA=(0<<ADEN) | (0<<ADSC) | (0<<ADATE) | (0<<ADIF) | (0<<ADIE) | (0<<ADPS2) | (0<<ADPS1) | (0<<ADPS0);

// SPI initialization
// SPI disabled
SPCR=(0<<SPIE) | (0<<SPE) | (0<<DORD) | (0<<MSTR) | (0<<CPOL) | (0<<CPHA) | (0<<SPR1) | (0<<SPR0);

// TWI initialization
// TWI disabled
TWCR=(0<<TWEA) | (0<<TWSTA) | (0<<TWSTO) | (0<<TWEN) | (0<<TWIE);

// 1 Wire Bus initialization
// 1 Wire Data port: PORTD
// 1 Wire Data bit: 6
// Note: 1 Wire port settings are specified in the
// Project|Configure|C Compiler|Libraries|1 Wire menu.
w1_init();
ds1820_devices=w1_search(0xf0,rom_codes);
// Alphanumeric LCD initialization
// Connections are specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS - PORTC Bit 0
// RD - PORTC Bit 1
// EN - PORTC Bit 2
// D4 - PORTC Bit 4
// D5 - PORTC Bit 5
// D6 - PORTC Bit 6
// D7 - PORTC Bit 7
// Characters/line: 16
lcd_init(16);

while (1)
      {
      // Place your code here
      temp=ds1820_temperature_10(&rom_codes[0][0]);  
      point=temp%10;
      baghie=(temp-point)/10;
      sprintf(buffer,"Temp: %d.%d",baghie,point);
      lcd_gotoxy(0,0);
      lcd_puts(buffer);
      delay_ms(500); 
      
      
      }
}
 

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