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/*****ÑÓʱ×Ó³ÌÐò*****/ void Delay_DS18B20(int num) {
while(num--) ; }
void delay()//5΢ÃëÑÓʱº¯Êý { ;; }
void start() //¿ªÊ¼ÐźŠ{ }
void stop() //ÖÕÖ¹ÐźŠ{ }
SDA=1; delay(); SCL=1; delay(); SDA=0; delay();
SDA=0; delay(); SCL=1; delay(); SDA=1; delay();
void respons() //Ó¦´ð {
uc i; SCL=1; delay();
while((SDA==1)&&(i<250))i++;//Èç¹ûSDAΪµÍÓ¦´ðÓÐЧ£¬»òÕß³¬¹ýÒ»¶¨Ê±¼äĬ
ÈÏÓ¦´ðÓÐЧ }
void init24c04()//I2C×ÜÏß³õʼ»¯ { }
void write_byte(uc date)//д²Ù×÷ {
SCL=0; delay();
SDA=1; delay(); SCL=1; delay();
uc i,temp; temp=date; for(i=0;i<8;i++) {
temp=temp<<1; SCL=0;
}
delay(); } SCL=0; delay(); SDA=1; delay();
SDA=CY; delay(); SCL=1; delay();
uc read_byte()//¶Á²Ù×÷ {
uc i,k; SCL=0; delay(); SDA=1; delay();
for(i=0;i<8;i++) {
SCL=1; delay();
k=(k<<1)|SDA; SCL=0; delay();
}
}
return k;
void write_add(uc address,uc date)//ÍùÈÎÒâµØÖ·´æÊý¾Ý { }
uc read_add(uc address)//¶ÁËæÒâµØÖ·ÄÚÈÝ {
start();
write_byte(0xa0);//0xa0´ú±íдÈë respons();
write_byte(address); respons(); write_byte(date); respons(); stop();
uc date; start();
write_byte(0xa0);//0xa0´ú±íдÈë respons();
write_byte(address); respons(); start();
write_byte(0xa1);//0xa1´ú±í¶Á³ö respons();
}
date=read_byte(); stop();
return date;//·µ»ØÖµ
/*****³õʼ»¯DS18B20*****/ void Init_DS18B20(void) {
uc w=0;
DQ = 1; //DQ¸´Î» Delay_DS18B20(8); //ÉÔ×öÑÓʱ DQ = 0; //µ¥Æ¬»ú½«DQÀµÍ
Delay_DS18B20(80); //¾«È·ÑÓʱ£¬´óÓÚ480us DQ = 1; //À¸ß×ÜÏß Delay_DS18B20(14);
w = DQ; //ÉÔ×öÑÓʱºó£¬Èç¹ûx=0Ôò³õʼ»¯³É¹¦£¬x=1Ôò³õʼ»¯Ê§°Ü Delay_DS18B20(20); }
/*****¶ÁÒ»¸ö×Ö½Ú*****/
unsigned char ReadOneChar(void) {
uc i=0; uc dat = 0; for (i=8;i>0;i--) {
DQ = 0; // ¸øÂö³åÐźÅ