return 44330 * (1 - System.Math.Pow((pressure / 100 / 1013.25), 1 / 5.255));
}
/// <summary>
///
/// </summary>
/// <param name="mode"></param>
/// <returns>Presure in [Pa]</returns>
public long GetPressure(PresureAccurancyMode mode)
{
GetTemperature();
int oss = (int)mode;
long UP = GetRawPressure(mode);
long b6 = _B5 - 4000;
_X1 = (_B2 * (b6 * b6 / (1 << 12))) / (1 << 11);
_X2 = _AC2 * b6 / (1 << 11);
long x3 = _X1 + _X2;
long b3 = (((_AC1 * 4 + x3) << oss) + 2) / 4;
_X1 = _AC3 * b6 / (1 << 13);
_X2 = (_B1 * (b6 * b6 / (1 << 12))) / (1 << 16);
x3 = ((_X1 + _X2) + 2) / 4;
ulong b4 = _AC4 * (ulong)(x3 + 32768) / (1 << 15);
ulong b7 = (ulong)((UP - b3) * (50000 >> oss));
long p;
if (b7 < 0x80000000) { p = (long)((b7 * 2) / b4); }
else { p = (long)((b7 / b4) * 2); }
_X1 = (p / 256) * (p / 256);
_X1 = (_X1 * 3038) / (1 << 16);
_X2 = (-7357 * p) / (1 << 16);
return p;
}
public long GetRawPressure(PresureAccurancyMode mode)
{
int data = 0x34 + ((byte)mode << 6);
int waitingTime = 5;
switch (mode)
{
case PresureAccurancyMode.UltraLowPower:
waitingTime = 5;
break;
case PresureAccurancyMode.Standard:
waitingTime = 8;
break;
case PresureAccurancyMode.HighResolution:
waitingTime = 14;
break;
case PresureAccurancyMode.UltraHighResolution:
waitingTime = 26;
break;
}
WriteCommand((byte)data);
Thread.Sleep(waitingTime); //defined waiting time
write(0xF6);
byte[] readedVal = read(3);
