13.5.2单总线数字温度传感器.txt

里面有好多的原码,大家都来下载.用asm编写的

sbitDQ=PI^2;						
unsigned char ROMID[ 16][81;
unsigned char TH;
unsigned char TL;
unsigned char confbReg;
unsigned char scratchPad[9];
unsigned char setBuf[3];
void delay(int cat)
{
int i;
for(i=0;i<cnt;i++);
}
unsigned char bus rcset(vod)
{
unsigned char presence;
DQ=0;							
delay(29);							
DQ=1;							
delay(3);							
Presence=DQ						
delay(25);							
return presence;						
}

unsigned char rena bit(void)
{
unsigned char i;
DQ=0;
DQ=1;							
for(i=0;i<3;i++);						
return DQ;							

void write}bit(cliar bitvalue)
{
DQ=0;							
if(bitvalue==1)
{
DQ=1;							
}
delay(5);							
DQ=1;							
}

unsigned char read byte(void)
unsigned char i;
unsigned char value=0;				
for(i=0;i<8;i++)						
{
if(read bit())						
{
value=value| (0x01 <<i);
}
}
delay(6);							
return value;
}

void write-byte(cbar bytevalne)
{
unsigned chat i;
unsigned char temp;
for(i=0;i<8;i ++)					
{
temp=bytevalue>>i;					
temp=temp&0x01;					
write bit(temp);						
}
delay(5);							
}
unsigned char i;						
if(bus-resetQ) return false;				
write byte(0x55);