public async Task <Bmp180SensorData> GetSensorDataAsync(Bmp180AccuracyMode oss)
{
// Create the return object.
var sensorData = new Bmp180SensorData();
// Read the Uncompestated values from the sensor.
var tData = await ReadUncompestatedTemperature();
var pData = await ReadUncompestatedPressure(oss);
// Keep raw data for debug
sensorData.UncompestatedTemperature = tData;
sensorData.UncompestatedPressure = pData;
var ut = (tData[0] << 8) + tData[1];
var up = (pData[0] * 256.0) + pData[1] + (pData[2] / 256.0);
// Calculate real values
var b5 = calculateB5(ut);
var t = (b5 + 8) >> 4;
sensorData.Temperature = t / 10.0;
var s = sensorData.Temperature - 25.0;
var x = (x2 * Math.Pow(s, 2)) + (x1 * s) + x0;
var y = (y2 * Math.Pow(s, 2)) + (y1 * s) + y0;
var z = (up - x) / y;
sensorData.Pressure = (p2 * Math.Pow(z, 2)) + (p1 * z) + p0;
return(sensorData);
}
public async Task <Bmp180SensorData> GetSensorDataAsync(Bmp180AccuracyMode oss)
{
// Create the return object.
var sensorData = new Bmp180SensorData();
// Read the Uncompestated values from the sensor.
var tData = await ReadUncompestatedTemperature();
var pData = await ReadUncompestatedPressure(oss);
// Keep raw data for debug
sensorData.UncompestatedTemperature = tData;
sensorData.UncompestatedPressure = pData;
var ut = (tData[0] << 8) + tData[1];
var up = pData[0] * 256.0 + pData[1] + pData[2] / 256.0;
// Calculate real values
var b5 = calculateB5(ut);
var t = (b5 + 8) >> 4;
sensorData.TemperatureInCelcius = t / 10.0;
sensorData.TemperatureFarenheight = (9.0 / 5.0) * sensorData.TemperatureInCelcius + 32;
var s = sensorData.TemperatureInCelcius - 25.0;
var x = x2 * Math.Pow(s, 2) + x1 * s + x0;
var y = y2 * Math.Pow(s, 2) + y1 * s + y0;
var z = (up - x) / y;
sensorData.Pressure = p2 * Math.Pow(z, 2) + p1 * z + p0;
return(sensorData);
}
public async Task <byte[]> ReadUncompestatedPressure(Bmp180AccuracyMode ossMode)
{
byte presssureCommand = 0;
var delay = 5;
switch (ossMode)
{
case Bmp180AccuracyMode.UltraLowPower:
presssureCommand = BMP180_COM_PRESSURE0;
delay = 5;
break;
case Bmp180AccuracyMode.Standard:
presssureCommand = BMP180_COM_PRESSURE1;
delay = 8;
break;
case Bmp180AccuracyMode.HighResolution:
presssureCommand = BMP180_COM_PRESSURE2;
delay = 14;
break;
case Bmp180AccuracyMode.UltraHighResolution:
presssureCommand = BMP180_COM_PRESSURE3;
delay = 26;
break;
}
var command = new[] { BMP180_REG_CONTROL, presssureCommand };
_i2CBarometer.Write(command);
await Task.Delay(delay);
return(WriteRead(BMP180_REG_RESULT, 3));;
}
public async Task<Bmp180SensorData> GetSensorDataAsync(Bmp180AccuracyMode oss)
{
// Create the return object.
var sensorData = new Bmp180SensorData();
// Read the Uncompestated values from the sensor.
var tData = await ReadUncompestatedTemperature();
var pData = await ReadUncompestatedPressure(oss);
// Keep raw data for debug
sensorData.UncompestatedTemperature = tData;
sensorData.UncompestatedPressure = pData;
var ut = (tData[0] << 8) + tData[1];
var up = (pData[0] * 256.0) + pData[1] + (pData[2] / 256.0);
// Calculate real values
var b5 = calculateB5(ut);
var t = (b5 + 8) >> 4;
sensorData.Temperature = t/10.0;
var s = sensorData.Temperature - 25.0;
var x = (x2 * Math.Pow(s, 2)) + (x1 * s) + x0;
var y = (y2 * Math.Pow(s, 2)) + (y1 * s) + y0;
var z = (up - x) / y;
sensorData.Pressure = (p2 * Math.Pow(z, 2)) + (p1 * z) + p0;
return sensorData;
}
public async Task<byte[]> ReadUncompestatedPressure(Bmp180AccuracyMode ossMode)
{
byte presssureCommand = 0;
var delay = 5;
switch (ossMode)
{
case Bmp180AccuracyMode.UltraLowPower:
presssureCommand = BMP180_COM_PRESSURE0;
delay = 5;
break;
case Bmp180AccuracyMode.Standard:
presssureCommand = BMP180_COM_PRESSURE1;
delay = 8;
break;
case Bmp180AccuracyMode.HighResolution:
presssureCommand = BMP180_COM_PRESSURE2;
delay = 14;
break;
case Bmp180AccuracyMode.UltraHighResolution:
presssureCommand = BMP180_COM_PRESSURE3;
delay = 26;
break;
}
var command = new[] { BMP180_REG_CONTROL, presssureCommand };
_i2CBarometer.Write(command);
await Task.Delay(delay);
return WriteRead(BMP180_REG_RESULT, 3); ;
}
