内容发布更新时间 : 2024/5/3 0:15:28星期一 下面是文章的全部内容请认真阅读。

uchar ds_date; dsas=1; dsds=1; dsrw=1; dscs=0; P0=add; dsas=0; dsds=0; P0=0xff; ds_date=P0; dsds=1; dsas=1; dscs=1; return ds_date;

}

void set_time(uchar a,uchar b,uchar c,uchar d,uchar f,uchar g,uchar h) { write_ds(0,a); write_ds(2,b);

write_ds(4,c); write_ds(6,d); write_ds(7,f); write_ds(8,g); write_ds(9,h);

}

void set_alarm(uchar ashi,uchar afen,uchar amiao) { write_ds(1,amiao); write_ds(3,afen); write_ds(5,ashi);

}

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void delay_18b20(unsigned int i) {

while(i--); }

void Init_DS18B20() {

unsigned char x=0; DQ = 1; delay_18b20(8); DQ = 0; delay_18b20(80); DQ = 1; delay_18b20(10); x=DQ; delay_18b20(5); }

unsigned char ReadOneChar() {

unsigned char i=0; unsigned char dat = 0; for (i=8;i>0;i--) {

DQ = 0; dat>>=1; DQ = 1; if(DQ) dat|=0x80; delay_18b20(5); } return(dat); }

void WriteOneChar(unsigned char dat) {

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unsigned char i=0; for (i=8; i>0; i--) { DQ = 0; DQ = dat&0x01; delay_18b20(5); DQ = 1; dat>>=1; }

delay_18b20(5); }

unsigned char ReadTemperature() {

unsigned char a=0; unsigned char b=0; unsigned char t=0; float tt=0; Init_DS18B20(); WriteOneChar(0xCC); WriteOneChar(0x44); delay_18b20(200); Init_DS18B20(); WriteOneChar(0xCC); WriteOneChar(0xBE); a=ReadOneChar(); b=ReadOneChar(); b<<=4;

b+=(a&0xf0)>>4; t=b; return (t); }

void delay2(uint z) {

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}

uint x,y; for(x=z;x>0;x--)

for(y=110;y>0;y--);

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