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標(biāo)題: DS18B20多路采集 ROM編碼的讀取與使用 [打印本頁(yè)]

作者: 歹匕礻申 時(shí)間: 2020-6-1 14:44
標(biāo)題: DS18B20多路采集 ROM編碼的讀取與使用
如用Proteus 需更改DS18B20的ROM值多路采集需單個(gè)讀取其ROM值
/*ROM編碼讀取*/
void DS18B20_Read_8Rom(uchar *buffer)
{
uchar i;
    init_ds18b20();
Write_DS18B20(0x33);
for(i=0;i<8;i++)
buffer[i]=Read_DS18B20();
}

void send(uchar x)
{
SBUF=x;
while(!TI);
TI=0;
}
void read_DS18B20bm()
{
uchar ww=0;
delay(222);
DS18B20_Read_8Rom(cun);
for(ww=0;ww<8;ww++)
{
send(cun[ww]);
delay(222);
}
}
/*溫度讀取*/

void DS18B20_Write_Rom(uchar *buffer)
{

signed char i;
for(i=0;i<8;i++)
Write_DS18B20(buffer[i]); //寫入8個(gè)字節(jié)的ROM

}
uchar rd_temperature(uchar *buffer)
{
uchar high,low;
char temp;
    init_ds18b20();
Write_DS18B20(0x55);
DS18B20_Write_Rom(buffer);
Write_DS18B20(0x44);
    Delay_OneWire(200);
    init_ds18b20();
Write_DS18B20(0x55);
DS18B20_Write_Rom(buffer);
Write_DS18B20(0xbe);
    Delay_OneWire(200);

    low = Read_DS18B20();
    high = Read_DS18B20();

    temp = high<<4;
    temp |= (low>>4);
    return temp;
}
附 DS18B20手冊(cè)多路采集表

_O]R4KJ72JN3YCDH4UQBGA3.png (201.95 KB, 下載次數(shù): 72)

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