//Set sensor resolution
/*******************************************************************************************/
//Sets the sensor resolution to one of four levels
//Page 12:
// 0/0 = 12bit RH, 14bit Temp
// 0/1 = 8bit RH, 12bit Temp
// 1/0 = 10bit RH, 13bit Temp
// 1/1 = 11bit RH, 11bit Temp
//Power on default is 0/0
void SetResolution(SensorResolution resolution)
{
byte userData = si7021.ReadRegister(READ_USER_REGISTER); //Go get the current register state
//userRegister &= 0b01111110; //Turn off the resolution bits
//resolution &= 0b10000001; //Turn off all other bits but resolution bits
//userRegister |= resolution; //Mask in the requested resolution bits
var res = (byte)resolution;
userData &= 0x73; //Turn off the resolution bits
res &= 0x81; //Turn off all other bits but resolution bits
userData |= res; //Mask in the requested resolution bits
//Request a write to user register
si7021.WriteBytes(new byte[] { WRITE_USER_REGISTER }); //Write to the user register
si7021.WriteBytes(new byte[] { userData }); //Write the new resolution bits
}
//Set sensor resolution
/*******************************************************************************************/
//Sets the sensor resolution to one of four levels
//Page 12:
// 0/0 = 12bit RH, 14bit Temp
// 0/1 = 8bit RH, 12bit Temp
// 1/0 = 10bit RH, 13bit Temp
// 1/1 = 11bit RH, 11bit Temp
//Power on default is 0/0
void SetResolution(SensorResolution resolution)
{
var userData = new byte[0];
htu21d.WriteRead(new byte[] { READ_USER_REGISTER }, userData); //Go get the current register state
//userRegister &= 0b01111110; //Turn off the resolution bits
//resolution &= 0b10000001; //Turn off all other bits but resolution bits
//userRegister |= resolution; //Mask in the requested resolution bits
var res = (byte)resolution;
userData[0] &= 0x73; //Turn off the resolution bits
res &= 0x81; //Turn off all other bits but resolution bits
userData[0] |= res; //Mask in the requested resolution bits
//Request a write to user register
htu21d.Write(new byte[] { WRITE_USER_REGISTER }); //Write to the user register
htu21d.Write(userData); //Write the new resolution bits
}
private void MeasureDelay(SensorResolution resolution)
{
Int32 delay;
switch (resolution)
{
case SensorResolution.Resolution_10RH_13T:
{
delay = 52;
break;
}
case SensorResolution.Resolution_11RH_11T:
{
delay = 26;
break;
}
case SensorResolution.Resolution_8RH_12T:
{
delay = 26;
break;
}
case SensorResolution.Resolution_12RH_14T:
{
delay = 114;
break;
}
default:
{
delay = 114;
break;
}
}
Thread.Sleep(delay);
}
