//----------------------------------------------------------------------------// 复位 DS1820 //CPU将数据线拉低480us,然后释放, //当DS18B20收到信号后等待16~60us左右,后发出60~240us的存在低脉冲,
void wr1302(unsigned char dat) //向1302写1个字节 { unsigned char i; for(i=0;i>1; //数据右移 ; } } unsigned char rd1302(void) //从1302读1个字节 { unsigned char i; for(i=0;i>1; DATA130
//24c64子程序//------------------------------------------------------------------------------ //CPU产生I2C起始信号,SCL高电平期间,SDA由1到0 //-------------------------------------------------------