1820.c~

avr单片机在codevision下关于ds18b20的驱动程序

/*****************************************************
Project :   18B20测温代码 
Version :           
Date    : 2006-1-6
Author  : whoami                          
Company :                                  
Comments:     

Chip type           : ATmega16L
Program type        : Application
Clock frequency     : 8.000000 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 256
*****************************************************/
#include <mega16.h>
#include <delay.h> 
#include <stdio.h>

// DS1820 Temperature Sensor functions
#include <ds1820.h>
#include <lcd.h> 
#asm
	.equ __lcd_port=0x18
#endasm

// 1 Wire Bus functions
#include <1wire.h>
#asm
   .equ __w1_port=0x15
   .equ __w1_bit=0
#endasm

// Declare your global variables here
int temp,temp_h,temp_l,shi,ge,_1,_2;//定义温度值               
char lcd_buffer[33]; //

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

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
TCCR1A=0x00;
TCCR1B=0x00;
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: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
// Analog Comparator Output: Off
ACSR=0x80;
SFIOR=0x00;

// 1 Wire Bus initialization
w1_init(); 
lcd_init(16);

lcd_clear(); 
lcd_gotoxy(0,0);//检测DS18B20是否存在
if(ds1820_set_alarm(0,25,35)) 
{
	lcd_putsf("OK  ^_^");  
}
else
{  
   lcd_putsf("ERROR !!!"); 
   lcd_gotoxy(0,1);
   lcd_putsf("Out of connect!");
   while(1);
}

while(1)
      {
      	// Place your code here 
      	temp=ds1820_temperature_10(0);
      	temp_h=temp/80;  //DS18B20要/80 
      	temp_l=temp%80;
      	
      	shi = temp_h/10;
      	ge  = temp_h%10;
     	_1  = temp_l/10; //有个BUG，待解决 呵呵
     	if(_1 == 4)_1 =5;
     	else      _1 = 0;
      	_2  = temp_l%10;
      
      	lcd_gotoxy(0,1);
		//sprintf(lcd_buffer,"Temp1=%-i.%-u\xf8C\n\r",temp/80,abs(temp%80)); 
	//   	sprintf(lcd_buffer,"Temp1=%-i.%-u C\n\r",temp/80,temp%80); 
	    sprintf(lcd_buffer,"Temp1=%d%d.%d%d C\n\r",shi,ge,_1,_2); 
 		puts(lcd_buffer);
  		delay_ms(500); 
      };
}