public float ReadPressure()
{
var status = I2cUtils.Read8(device, C_Status);
if ((status & 2) == 2)
{
Int32 rawData = (Int32)I2cUtils.Read24LE(device, C_PressOutXL + 0x80);
return(rawData * pressureFactor);
}
return(0.0f);
}
public float ReadTemperature()
{
var status = I2cUtils.Read8(device, C_Status);
if ((status & 1) == 1)
{
var rawData = (Int16)I2cUtils.Read16LE(device, C_TempOutL + 0x80);
return(convertTemperature(rawData));
}
// TODO: throw exception or return status code if reading is ready or not?
return(0.0f);
}
public float ReadHumidity()
{
var status = I2cUtils.Read8(device, C_Status);
if ((status & 2) == 2)
{
var rawData = (Int16)I2cUtils.Read16LE(device, C_HumidityOutL + 0x80);
return(convertHumidity(rawData));;
}
// TODO: throw exception or return status code if reading is ready or not?
return(0.0f);
}
private Func <Int16, float> GetHumidityConverter()
{
byte h0h2 = I2cUtils.Read8(device, C_H0H2 + 0x80);
byte h1h2 = I2cUtils.Read8(device, C_H1H2 + 0x80);
float h0 = h0h2 * 0.5f;
float h1 = h1h2 * 0.5f;
Int16 h0t0out = (Int16)I2cUtils.Read16LE(device, C_H0T0Out + 0x80);
Int16 h1t0out = (Int16)I2cUtils.Read16LE(device, C_H1T0Out + 0x80);
float m = (h1 - h0) / (h0t0out - h1t0out);
float b = h0 - (m * h0t0out);
return(t => t * m + b);
}
private Func <Int16, float> GetTemperatureConverter()
{
byte rawMsb = I2cUtils.Read8(device, C_T1T0 + 0x80);
byte t0Lsb = I2cUtils.Read8(device, C_T0C8 + 0x80);
byte t1Lsb = I2cUtils.Read8(device, C_T1C8 + 0x80);
UInt16 t0c8 = (UInt16)(((UInt16)(rawMsb & 0x03) << 8) | (UInt16)t0Lsb);
UInt16 t1c8 = (UInt16)(((UInt16)(rawMsb & 0x0C) << 6) | (UInt16)t1Lsb);
float t0 = t0c8 / 8.0f;
float t1 = t1c8 / 8.0f;
Int16 t0out = (Int16)I2cUtils.Read16LE(device, C_T0Out + 0x80);
Int16 t1out = (Int16)I2cUtils.Read16LE(device, C_T1Out + 0x80);
float m = (t1 - t0) / (t1out - t0out);
float b = t0 - (m * t0out);
return(t => t * m + b);
}
