static double DecodeFlightLevel(Bit_Ops BO_In)
{
double Result = 0.0;
// First check if this is a negative altitude.
// and then handle it properly
if (BO_In.DWord[Bit_Ops.Bit13] == true)
{
BO_In.DWord[Bit_Ops.Bit0] = !BO_In.DWord[Bit_Ops.Bit0];
BO_In.DWord[Bit_Ops.Bit1] = !BO_In.DWord[Bit_Ops.Bit1];
BO_In.DWord[Bit_Ops.Bit2] = !BO_In.DWord[Bit_Ops.Bit2];
BO_In.DWord[Bit_Ops.Bit3] = !BO_In.DWord[Bit_Ops.Bit3];
BO_In.DWord[Bit_Ops.Bit4] = !BO_In.DWord[Bit_Ops.Bit4];
BO_In.DWord[Bit_Ops.Bit5] = !BO_In.DWord[Bit_Ops.Bit5];
BO_In.DWord[Bit_Ops.Bit6] = !BO_In.DWord[Bit_Ops.Bit6];
BO_In.DWord[Bit_Ops.Bit7] = !BO_In.DWord[Bit_Ops.Bit7];
BO_In.DWord[Bit_Ops.Bit8] = !BO_In.DWord[Bit_Ops.Bit8];
BO_In.DWord[Bit_Ops.Bit9] = !BO_In.DWord[Bit_Ops.Bit9];
BO_In.DWord[Bit_Ops.Bit10] = !BO_In.DWord[Bit_Ops.Bit10];
BO_In.DWord[Bit_Ops.Bit11] = !BO_In.DWord[Bit_Ops.Bit11];
BO_In.DWord[Bit_Ops.Bit12] = !BO_In.DWord[Bit_Ops.Bit12];
BO_In.DWord[Bit_Ops.Bit13] = false;
BO_In.DWord[Bit_Ops.Bit14] = false;
BO_In.DWord[Bit_Ops.Bit15] = false;
BO_In.DWord[Bit_Ops.Bits0_15_Of_DWord] = BO_In.DWord[Bit_Ops.Bits0_15_Of_DWord] + 1;
if (BO_In.DWord[Bit_Ops.Bit0] == true)
Result = Result + 0.25;
if (BO_In.DWord[Bit_Ops.Bit1] == true)
Result = Result + 0.50;
if (BO_In.DWord[Bit_Ops.Bit2] == true)
Result = Result + 1.00;
if (BO_In.DWord[Bit_Ops.Bit3] == true)
Result = Result + 2.00;
if (BO_In.DWord[Bit_Ops.Bit4] == true)
Result = Result + 4.00;
if (BO_In.DWord[Bit_Ops.Bit5] == true)
Result = Result + 8.00;
if (BO_In.DWord[Bit_Ops.Bit6] == true)
Result = Result + 16.00;
if (BO_In.DWord[Bit_Ops.Bit7] == true)
Result = Result + 32.00;
if (BO_In.DWord[Bit_Ops.Bit8] == true)
Result = Result + 64.00;
if (BO_In.DWord[Bit_Ops.Bit9] == true)
Result = Result + 128.00;
if (BO_In.DWord[Bit_Ops.Bit10] == true)
Result = Result + 256.00;
if (BO_In.DWord[Bit_Ops.Bit11] == true)
Result = Result + 512.00;
if (BO_In.DWord[Bit_Ops.Bit12] == true)
Result = Result + 1024.00;
Result = -Result;
}
else
{ // A positive value
if (BO_In.DWord[Bit_Ops.Bit0] == true)
Result = Result + 0.25;
if (BO_In.DWord[Bit_Ops.Bit1] == true)
Result = Result + 0.50;
if (BO_In.DWord[Bit_Ops.Bit2] == true)
Result = Result + 1.00;
if (BO_In.DWord[Bit_Ops.Bit3] == true)
Result = Result + 2.00;
if (BO_In.DWord[Bit_Ops.Bit4] == true)
Result = Result + 4.00;
if (BO_In.DWord[Bit_Ops.Bit5] == true)
Result = Result + 8.00;
if (BO_In.DWord[Bit_Ops.Bit6] == true)
Result = Result + 16.00;
if (BO_In.DWord[Bit_Ops.Bit7] == true)
Result = Result + 32.00;
if (BO_In.DWord[Bit_Ops.Bit8] == true)
Result = Result + 64.00;
if (BO_In.DWord[Bit_Ops.Bit9] == true)
Result = Result + 128.00;
if (BO_In.DWord[Bit_Ops.Bit10] == true)
Result = Result + 256.00;
if (BO_In.DWord[Bit_Ops.Bit11] == true)
Result = Result + 512.00;
if (BO_In.DWord[Bit_Ops.Bit12] == true)
Result = Result + 1024.00;
}
return Result;
}
