Sending data from DS18B20 to LCD ????

Development Boards MicroMod
1

Hi all ,

I 'm Minh .I come from Vietnam .I have just learned AVR for a short time and i ve got a problem ,i dont know how can i get out of this trouble .Can someone help me ?

I use Atmega16,LCD and DS18B20 .I want to send data from DS18B20 to LCD to display but It seems to be wrong in my code .Here is the code :

#asm
.equ __w1_port=0x1b   
.equ __w1_bit=6       
#endasm
#asm
.equ __lcd_port=0x15   
#endasm

#include <lcd.h>
#include <ds18b20.h>
#include <delay.h>
#include <stdio.h>
#include <mega16.h>
char lcd_buffer[33];


#define MAX_DEVICES 8


unsigned char rom_code[MAX_DEVICES][9];
main()
{
unsigned char i,j,t1,devices;
PORTD=0x00;
lcd_init(16);
lcd_putsf("Using DS18B20 :");
delay_ms(1000);
lcd_clear();     


devices=w1_search(0xf0,rom_code);
sprintf(lcd_buffer,"There are: \n %u DS18B20",devices);
lcd_puts(lcd_buffer);
delay_ms(2000);

if (devices)
{
for (i=0;i<devices;i++)
{
sprintf(lcd_buffer,"ROM code \nchip #%u :",i+1);
lcd_clear();
lcd_puts(lcd_buffer);
delay_ms(1000);
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(1000);
};
}
else
while (1);


for (i=0;i<devices;)
if (!ds18b20_init(&rom_code[i++][0],20,30,DS18B20_12BIT_RES))
{
sprintf(lcd_buffer,"The device is\n not working #%u",i);
lcd_clear();
lcd_puts(lcd_buffer);
while (1);
};


while (1)
{
      j=1;
      for (i=0;i<devices;i++)
          {
         
         sprintf(lcd_buffer,"t%u=%+.0f\xdfC",j++,ds18b20_temperature(&rom_code[i][0]));
          lcd_clear();
          lcd_puts(lcd_buffer); 
          t1 =  ds18b20_temperature(0);
          if (t1<35||t1>13)
          {
          PORTD=0x00;
          }
          if (t1 >= 35)   ;
          {
          PORTD=0x01;   
          }
          if (t1 <= 13)   ;
          { 
          PORTD=0x02;   
          }
           delay_ms(500);
          };
      };
}

Please help me ! I m so confuse about this .

2

Hi,

I know its a few months since you’ve requested for help, but have you solved your problem?

I have successfully to do the same just now and is willing to give my 2 cents.

rgds