SHT2X温湿传感器测量代码 -

标题: SHT2X温湿传感器测量代码 [打印本页]

作者: TomLai 时间: 2018-8-9 21:47
标题: SHT2X温湿传感器测量代码
void Sht_Measure(void)
{
u16 temp;
u8 temp1, temp2;
u8 rh1, rh2;
u32 rh = 0;
s32 rh_lin;

Sht_Start();
Sht_Send_Byte(T);
if(Sht_Read_Ack())    //读ACK
{
      printf("ACK error \r\n");
      return;
}
Set_Data_In();
while(SHTDATA)       //延时等待DATA变低
{
      Led_Run();
}
temp1 = Sht_Read_Byte();    //读高8位数据
Sht_Send_Ack();       //发送一个ACK
temp2 = Sht_Read_Byte();
temp=(temp1<<8)+temp2; //读低8位并合成一个16位数据
Sht_Send_Ack();       //发送一个ACK
Sht_Read_Byte();    //读CRC
Sht_Send_Ack();       //发送一个ACK
//printf("%x  %x  %d  \r\n", temp1, temp2, temp);
temp_true=temp-3963;    //14bit温度转换,其结果为实际温度*100
Sht_Start();
Sht_Send_Byte(RH);
if(Sht_Read_Ack())    //读ACK
{
      printf("ACK error \r\n");
      return;
}
Set_Data_In();
while(SHTDATA)       //延时等待DATA变低
{
      Led_Run();
}
rh1 = Sht_Read_Byte();    //读高8位数据
Sht_Send_Ack();       //发送一个ACK
rh2 = Sht_Read_Byte();
rh=(rh1<<8)+rh2; //读低8位并合成一个16位数据
Sht_Send_Ack();       //发送一个ACK
Sht_Read_Byte();    //读CRC
Sht_Send_Ack();       //发送一个ACK
rh_lin  = 0.0405*rh  - 400 - 0.0000028*rh*rh;
rh_true = (temp_true+3963-2500)*(1+0.00008*rh)+rh_lin;
}
#endif

作者: lon7085 时间: 2018-8-10 08:56
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