Mám s tím také problémy, pořád mi to ukazuje -255.93 a čidlo nereaguje, dokázal by mi někdo poradit :
[code]
#include <mega32.h>
#include <delay.h>
#include <stdio.h>
// 1 Wire Bus interface functions
#include <1wire.h>
char buffer[16];
void read_temperature(char *buffer);
// DS1820 Temperature Sensor functions
#include <ds1820.h>
// maximum number of DS1820 devices
// connected to the 1 Wire bus
#define MAX_DS1820 8
// number of DS1820 devices
// connected to the 1 Wire bus
unsigned char i,j,ds1820_devices;
// DS1820 devices ROM code storage area,
// 9 bytes are used for each device
// (see the w1_search function description in the help)
unsigned char ds1820_rom_codes[MAX_DS1820][9];
// Alphanumeric LCD functions
#include <alcd.h>
// Declare your local variables here
#define SKIP_ROM 0xCC
#define CONVERT_T 0x44
#define READ_SCRAT 0xbe
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=Out
DDRC=(0<<DDC7) | (0<<DDC6) | (0<<DDC5) | (0<<DDC4) | (0<<DDC3) | (0<<DDC2) | (0<<DDC1) | (1<<DDC0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=P Bit0=0
PORTC=(0<<PORTC7) | (0<<PORTC6) | (0<<PORTC5) | (0<<PORTC4) | (0<<PORTC3) | (0<<PORTC2) | (1<<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
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: 0
// Note: 1 Wire port settings are specified in the
// Project|Configure|C Compiler|Libraries|1 Wire menu.
w1_init();
// Determine the number of DS1820 devices
// connected to the 1 Wire bus
ds1820_devices=w1_search(0xf0,ds1820_rom_codes);
/* display the ROM codes for each device /
if (ds1820_devices)
{
for (i=0;i<ds1820_devices;i++)
{
sprintf(buffer,“Zarizeni #%u ROM\nKod:”,i+1);
lcd_clear();
lcd_puts(buffer);
delay_ms(2000);
lcd_clear();
for (j=0;j<8;j++)
{
sprintf(buffer,"%02X ",ds1820_rom_codes[j]);
lcd_puts(buffer);
if (j==3) lcd_gotoxy(0,1);
};
delay_ms(5000);
};
}
else
while (1); /* stop here if no devices were found */
// Alphanumeric LCD initialization
// Connections are specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS - PORTB Bit 0
// RD - PORTB Bit 1
// EN - PORTB Bit 2
// D4 - PORTB Bit 4
// D5 - PORTB Bit 5
// D6 - PORTB Bit 6
// D7 - PORTB Bit 7
// Characters/line: 16
lcd_init(16);
lcd_gotoxy(0,0);
lcd_puts(“Teplota”);
#asm(“cli”); // zakaz preruseni
PORTC.0=1; // 1 indikuje zhasnutou diodu, kdyby tam byla 0, tak by dioda svitila
while (1)
{
// LEDFlasher
if(PINC.1==0) // pokud stisknu tlacitko
{
PORTC.0=0; // rozsvitim diodu
delay_ms(100); // necham nejakou dobu svitit
PORTC.0=1; // zhasnu diodu
delay_ms(1000); // v pripade, ze bych tlacitko drzel a nepustil, tak abych videl blikani, musim dat nejake zpozdeni
};
read_temperature(buffer);
delay_ms(5000);
}
}
void read_temperature(char *buffer){
unsigned char temperature[2];
//conversion 2 byte to digit and decimal
unsigned char digit;
unsigned int decimal;
//Reset, skip ROM and start temperature conversion
//reset_ds();
w1_write(SKIP_ROM);
w1_write(CONVERT_T);
//Wait until conversion is complete
while(!w1_read()); //DS18B20 send 1 for conversion is done
//Reset, skip ROM and send command to read Scratchpad
//reset_ds();
w1_write(SKIP_ROM);
w1_write(READ_SCRAT);
//Read Scratchpad (only 2 first bytes)
temperature[0]=w1_read(); //low byte
temperature[1]=w1_read(); //high byte
digit = (temperature[1]<<4)&0xf0; //form 2 bytes to byte for conversion
digit |= (temperature[0]&0xf0)>>4;
decimal = (temperature[0]&0xf)*625; //625 create whole number (over 8b therefore uint16_t)
decimal/=100; //only 2 decimal place (1000 - one decimal place)
//display
lcd_clear();
lcd_gotoxy(0,0);
lcd_puts(“Teplota:”);
if (digit>=127)
{
lcd_gotoxy(0,1);
lcd_putchar(’-’);
}
lcd_gotoxy(1,1);
sprintf(buffer, “%3d.”, digit);
lcd_puts(buffer);
sprintf(buffer, “%d”, decimal);
lcd_puts(buffer);
}
[/code]*
administrator: přejmenováno z “Atmega32 DS1820 CodeVision Example”**
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