sbit p23=P2^3;
code uchar tab[]={0xc0,0xF9,0xA4,0xB0,0x99,0x92,
0x82,0xF8,0x80,0x90}; //0~9
code uchar tab1[]={0x40,0x79,0x24,0x30,0x19,0x12,
0x02,0x78,0x00,0x10};
uchar a,b,t;
uchar bai,shi,ge;
void delay(unsigned int i)
{
while(i--);
}
int_DS18B20()//对 ds18b20 初始化
{
unsigned char x=0;
DQ=1; //DQ 复位
delay(8); //延时
DQ=0; //单片机将 DQ 拉低
delay(80); //精度延时大于 480us
DQ=1; //拉高总线
delay(10);
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