18b20_main.i

DS18b20 CVAVR下的驱动

#pragma used+
sfrb TWBR=0;
sfrb TWSR=1;
sfrb TWAR=2;
sfrb TWDR=3;
sfrb ADCL=4;
sfrb ADCH=5;
sfrw ADCW=4;      
sfrb ADCSRA=6;
sfrb ADCSR=6;     
sfrb ADMUX=7;
sfrb ACSR=8;
sfrb UBRRL=9;
sfrb UCSRB=0xa;
sfrb UCSRA=0xb;
sfrb UDR=0xc;
sfrb SPCR=0xd;
sfrb SPSR=0xe;
sfrb SPDR=0xf;
sfrb PIND=0x10;
sfrb DDRD=0x11;
sfrb PORTD=0x12;
sfrb PINC=0x13;
sfrb DDRC=0x14;
sfrb PORTC=0x15;
sfrb PINB=0x16;
sfrb DDRB=0x17;
sfrb PORTB=0x18;
sfrb PINA=0x19;
sfrb DDRA=0x1a;
sfrb PORTA=0x1b;
sfrb EECR=0x1c;
sfrb EEDR=0x1d;
sfrb EEARL=0x1e;
sfrb EEARH=0x1f;
sfrw EEAR=0x1e;   
sfrb UBRRH=0x20;
sfrb UCSRC=0X20;
sfrb WDTCR=0x21;
sfrb ASSR=0x22;
sfrb OCR2=0x23;
sfrb TCNT2=0x24;
sfrb TCCR2=0x25;
sfrb ICR1L=0x26;
sfrb ICR1H=0x27;
sfrb OCR1BL=0x28;
sfrb OCR1BH=0x29;
sfrw OCR1B=0x28;  
sfrb OCR1AL=0x2a;
sfrb OCR1AH=0x2b;
sfrw OCR1A=0x2a;  
sfrb TCNT1L=0x2c;
sfrb TCNT1H=0x2d;
sfrw TCNT1=0x2c;  
sfrb TCCR1B=0x2e;
sfrb TCCR1A=0x2f;
sfrb SFIOR=0x30;
sfrb OSCCAL=0x31;
sfrb TCNT0=0x32;
sfrb TCCR0=0x33;
sfrb MCUCSR=0x34;
sfrb MCUCR=0x35;
sfrb TWCR=0x36;
sfrb SPMCR=0x37;
sfrb TIFR=0x38;
sfrb TIMSK=0x39;
sfrb GIFR=0x3a;
sfrb GICR=0x3b;
sfrb OCR0=0X3c;
sfrb SPL=0x3d;
sfrb SPH=0x3e;
sfrb SREG=0x3f;
#pragma used-

#asm
	#ifndef __SLEEP_DEFINED__
	#define __SLEEP_DEFINED__
	.EQU __se_bit=0x80
	.EQU __sm_mask=0x70
	.EQU __sm_powerdown=0x20
	.EQU __sm_powersave=0x30
	.EQU __sm_standby=0x60
	.EQU __sm_ext_standby=0x70
	.EQU __sm_adc_noise_red=0x10
	.SET power_ctrl_reg=mcucr
	#endif
#endasm

#asm
   .equ __w1_port=0x12 ;PORTD
   .equ __w1_bit=7
#endasm

#pragma used+
unsigned char w1_init(void);
unsigned char w1_read(void);
unsigned char w1_write(unsigned char data);
unsigned char w1_search(unsigned char cmd,void *p);
unsigned char w1_dow_crc8(void *p,unsigned char n);
#pragma used-

#pragma used+
extern struct __ds18b20_scratch_pad_struct
{
unsigned char temp_lsb,temp_msb,
temp_high,temp_low,
conf_register,
res1,
res2,
res3,
crc;
} __ds18b20_scratch_pad;

unsigned char ds18b20_select(unsigned char *addr);
unsigned char ds18b20_read_spd(unsigned char *addr);
float ds18b20_temperature(unsigned char *addr);
unsigned char ds18b20_init(unsigned char *addr,signed char temp_low,signed char temp_high,
unsigned char resolution);
#pragma used-

#pragma library ds18b20.lib

typedef char *va_list;

#pragma used+

char getchar(void);
void putchar(char c);
void puts(char *str);
void putsf(char flash *str);

char *gets(char *str,unsigned int len);

void printf(char flash *fmtstr,...);
void sprintf(char *str, char flash *fmtstr,...);
void snprintf(char *str, unsigned int size, char flash *fmtstr,...);
void vprintf (char flash * fmtstr, va_list argptr);
void vsprintf (char *str, char flash * fmtstr, va_list argptr);
void vsnprintf (char *str, unsigned int size, char flash * fmtstr, va_list argptr);
signed char scanf(char flash *fmtstr,...);
signed char sscanf(char *str, char flash *fmtstr,...);

#pragma used-

#pragma library stdio.lib

#pragma used+

void delay_us(unsigned int n);
void delay_ms(unsigned int n);

#pragma used-

unsigned char	num2char(unsigned char dat)
{
unsigned char change = 0;
switch(dat & 0x0f)    
{
case 0x0a: change = 'A'; break;
case 0x0b: change = 'B'; break;
case 0x0c: change = 'C'; break;
case 0x0d: change = 'D'; break;
case 0x0e: change = 'E'; break;
case 0x0f: change = 'F'; break;
default:   change = 0x30 + (dat & 0x0f);
}
return change;
}

void showbyte(unsigned char dat)
{

putsf(" 0x");
putchar(num2char(dat >> 4));
putchar(num2char(dat & 0x0f));
}

void    display_result(void)
{
ds18b20_read_spd(0);
showbyte(__ds18b20_scratch_pad.temp_lsb);
showbyte(__ds18b20_scratch_pad.temp_msb);
showbyte(__ds18b20_scratch_pad.temp_high);
showbyte(__ds18b20_scratch_pad.temp_low);
showbyte(__ds18b20_scratch_pad.conf_register);
showbyte(__ds18b20_scratch_pad.res1);
showbyte(__ds18b20_scratch_pad.res2);
showbyte(__ds18b20_scratch_pad.res3);
showbyte(__ds18b20_scratch_pad.crc);
putsf("\r\n");
}

void    dispaly_temperature(void)
{   unsigned char i,H,M,L;
putsf("The current temperature is: ");
i = (((__ds18b20_scratch_pad.temp_msb)&0x0f) <<4)
+(((__ds18b20_scratch_pad.temp_lsb)&0xf0) >>4);
if(((__ds18b20_scratch_pad.temp_msb)&0xf0)== 0)     
{   
H = i/100;
M = (i%100)/10;
L = i%10;
if(H){putchar(num2char(H));}
if(M){putchar(num2char(M));}    
putchar(num2char(L));
}
else
{
i = 255 - i +1;
M = i/10;
L = i%10;
putsf("-");
if(M)putchar(num2char(M));
putchar(num2char(L));
}
putsf("c  \r\n");

}
void main(void)
{

PORTD=0x00;
DDRD=0x00;

UCSRA=0x00;
UCSRB=0x08;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x19;

w1_init();
ds18b20_init(0,1,40,3 );  
ds18b20_read_spd(0);     
display_result();            

while (1)
{
ds18b20_temperature(0);  
display_result();           
dispaly_temperature();      
delay_ms(100);
putsf("\r\n");   
};
}