//----------------------------------------------------------------------------// 復(fù)位 DS1820 //CPU將數(shù)據(jù)線拉低480us,然后釋放, //當(dāng)DS18B20收到信號后等待16~60us左右,后發(fā)出60~240us的存在低脈沖,
void wr1302(unsigned char dat) //向1302寫1個字節(jié) { unsigned char i; for(i=0;i>1; //數(shù)據(jù)右移 ; } } unsigned char rd1302(void) //從1302讀1個字節(jié) { unsigned char i; for(i=0;i>1; DATA130
//24c64子程序//------------------------------------------------------------------------------ //CPU產(chǎn)生I2C起始信號,SCL高電平期間,SDA由1到0 //-------------------------------------------------------