public void CtrlTest()
{
List<byte> packet = new List<byte> ();
var bmp180 = new BMP180 ();
bmp180.Reset ();
// Check the CtrlMeasurement register
// Write a value to register
byte ctrlValue = 0xAA;
packet.Add ((byte)0xFD);
packet.Add ((byte)0xF4);
packet.Add (ctrlValue);
bmp180.Write (packet.ToArray ());
packet.Clear ();
// Read the CtrlMeasuremnent register value
packet.Add ((byte)0xFC);
packet.Add ((byte)0xF4);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] ctrlMeasurement = bmp180.Read ();
Assert.AreEqual (ctrlMeasurement[0], ctrlValue);
// Check the SoftReset
ctrlValue = 0xB6; //Should do same sequence as power-on-reset
packet.Add ((byte)0xFD);
packet.Add ((byte)0xE0);
packet.Add (ctrlValue);
bmp180.Write (packet.ToArray ());
packet.Clear ();
// Read the SoftReset register value
packet.Add ((byte)0xFC);
packet.Add ((byte)0xE0);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] softReset = bmp180.Read ();
Assert.AreEqual (softReset[0], 0);
// Read the CtrlMeasuremnent register value
packet.Add ((byte)0xFC);
packet.Add ((byte)0xF4);
bmp180.Write (packet.ToArray ());
packet.Clear ();
ctrlMeasurement = bmp180.Read ();
Assert.AreEqual (ctrlMeasurement[0], 0);
}
public void ReadMeasurementsTest()
{
List<byte> packet = new List<byte> ();
var bmp180 = new BMP180 ();
bmp180.Reset ();
// Read and setup calibration parameters.
packet.Add ((byte)0xFC);
packet.Add ((byte)0xAA);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibXX = bmp180.Read ();
Int16 AC1 = (Int16)(((Int16)calibXX[0] << 8) + (Int16)calibXX[1]);
Int16 AC2 = (Int16)(((Int16)calibXX[2] << 8) + (Int16)calibXX[3]);
Int16 AC3 = (Int16)(((Int16)calibXX[4] << 8) + (Int16)calibXX[5]);
UInt16 AC4 = (UInt16)(((UInt16)calibXX[6] << 8) + (UInt16)calibXX[7]);
UInt16 AC5 = (UInt16)(((UInt16)calibXX[8] << 8) + (UInt16)calibXX[9]);
UInt16 AC6 = (UInt16)(((UInt16)calibXX[10] << 8) + (UInt16)calibXX[11]);
Int16 B1 = (Int16)(((Int16)calibXX[12] << 8) + (Int16)calibXX[13]);
Int16 B2 = (Int16)(((Int16)calibXX[14] << 8) + (Int16)calibXX[15]);
// MB is currently not used
//Int16 MB = (Int16)(((Int16)calibXX[16] << 8) + (Int16)calibXX[17]);
Int16 MC = (Int16)(((Int16)calibXX[18] << 8) + (Int16)calibXX[19]);
Int16 MD = (Int16)(((Int16)calibXX[20] << 8) + (Int16)calibXX[21]);
// Start temperature measurement
byte ctrlValue = 0x2E;
packet.Add ((byte)0xFD);
packet.Add ((byte)0xF4);
packet.Add (ctrlValue);
bmp180.Write (packet.ToArray ());
packet.Clear ();
// Read the CtrlMeasuremnent register value
packet.Add ((byte)0xFC);
packet.Add ((byte)0xF4);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] ctrlMeasurement = bmp180.Read ();
Assert.AreEqual (ctrlMeasurement[0], ctrlValue);
// Wait 5 milliseconds, (> 4.5 is ok - see Datasheet for BMP180)
Thread.Sleep(5);
// Construct packet list for read of temperature registers
packet.Add ((byte)0xFC);
packet.Add ((byte)0xF6);
bmp180.Write (packet.ToArray ());
packet.Clear ();
// Read Temperature MSB and LSB registers
byte[] temp_bytes = bmp180.Read ();
// Calculate temperature
// X1 = (UT - AC6)*AC5/2^15
// X2 = MC*2^11/(X1+MD)
// For pressure calculation B5 = X1 + X2 is needed
// T = (X1 + X2 + 8)/2^4
Int32 UT = (((Int32)temp_bytes[0] << 8) & 0xFF00) + ((Int32)temp_bytes[1] & 0xFF);
Int32 X1 = (UT - Convert.ToInt32(AC6)) * Convert.ToInt32(AC5) / 0x8000;
Int32 X2 = (Convert.ToInt32(MC) * 0x800) / (X1 + Convert.ToInt32(MD));
Int32 B5 = X1 + X2;
Int32 temperatureInt = (X1 + X2 + 8) / 16;
// Temperature is given in 0.1 degrees C scale
double temperature = Convert.ToDouble(temperatureInt) / 10.0;
Assert.Greater (temperature, -40.0);
// Start pressure measurement
// Set oversampling ratio
byte ossBits = 0; // 0,1,2,3 means 1,2,4,8 times oversampling
ctrlValue = (byte)(0x34 + ((int)ossBits << 6));
packet.Add ((byte)0xFD);
packet.Add ((byte)0xF4);
packet.Add (ctrlValue);
bmp180.Write (packet.ToArray ());
packet.Clear ();
// Read the CtrlMeasuremnent register value
packet.Add ((byte)0xFC);
packet.Add ((byte)0xF4);
bmp180.Write (packet.ToArray ());
packet.Clear ();
ctrlMeasurement = bmp180.Read ();
Assert.AreEqual (ctrlMeasurement[0], ctrlValue);
// Wait 5 milliseconds, (> 4.5 is ok - see Datasheet for BMP180)
Thread.Sleep(5);
// Construct packet list for read of pressure registers
packet.Add ((byte)0xFC);
packet.Add ((byte)0xF6);
bmp180.Write (packet.ToArray ());
packet.Clear ();
// Read pressure MSB, LSB and XLSB registers
byte[] pressure_bytes = bmp180.Read ();
// Calculate pressure ; B5 is carried over from temperature calculation
// B6 = B5 - 4000
// --- Calculate B3
// X1 = B2 * (B6*B6 / 2^12) / 2^11
// X2 = AC2 * B6 / 2^11
// X3 = X1 + X2
// B3 = ((AC1 * 4 + X3) << oss + 2) / 4
// --- Calculate B4
// X1 = AC3 * B6 / 2^13
// X2 = B1 * (B6*B6 / 2^12) / 2^16
// X3 = (X1 + X2 + 2) / 2^2
// B4 = AC4 * (unsigned long)(X3 + 32768) / 2^15
// --- Calculate B7
// B7 = ((unsigned long)UP - B3) * (50000 >> oss)
// --- Finally calculate pressure
// if (B7 < 0x80000000)
// p = (2 * B7) / B4
// else
// p = 2 * (B7 / B4)
// X1 = (p / 2^8) * (p / 2^8)
// X1 = (X1 * 3038) / 2^16
// X2 = (-7357 * p) / 2^16
// P = p + (X1 + X2 + 3791) / 2^4
UInt32 uintUP = (((UInt32)pressure_bytes[0] << 16) & 0xFF0000) + (((UInt32)pressure_bytes[1] << 8) & 0xFF00) + (((UInt32)pressure_bytes[2]) & 0xFF);
// Handle oversampling setting
double UP = Convert.ToDouble(uintUP >> (8 - ossBits));
Int32 B6 = B5 - 4000;
X1 = Convert.ToInt32(B2) * (B6 * B6 / 4096) / 2048;
X2 = Convert.ToInt32(AC2) * B6 / 2048;
Int32 X3 = X1 + X2;
Int32 B3 = (((4 * Convert.ToInt32(AC1) + X3) << ossBits) + 2) / 4;
X1 = Convert.ToInt32(AC3) * B6 / 8192;
X2 = Convert.ToInt32(B1) * (B6 * B6 / 4096) / 65536;
X3 = (X1 + X2 + 2) / 4;
UInt32 B4 = Convert.ToUInt32(AC4) * Convert.ToUInt32(X3 + 32768) / 32768;
UInt32 B7 = (Convert.ToUInt32(UP) - Convert.ToUInt32(B3)) * Convert.ToUInt32((50000 >> ossBits));
Int32 p1 = 0;
if(B7 < 0x80000000)
{
p1 = Convert.ToInt32((2 * B7) / B4);
}
else
{
p1 = Convert.ToInt32(2 * (B7 / B4));
}
X1 = (p1 / 256) * (p1 / 256);
X1 = (X1 * 3038) / 65536;
X2 = 0;
X2 -= 7357 * p1 / 65536;
double pressure = Convert.ToDouble(p1 + (X1 + X2 + 3791)/16);
pressure = Math.Round(pressure, 0);
Assert.Greater (pressure, 0);
// Given the pressure at sea level p_0 e.g. 101325 Pa
// Calculate altitude = 44330 * [1 - ( p / p_0 )^( 1 / 5.255 )]
//Int32 altitudeInt = 44330 * (1 - Convert.ToInt32(Math.Pow((pressure / 101325.0), (1.0 / 5.255))));
//Console.WriteLine("Altitude: " + altitudeInt.ToString() + " meters above sea level");
}
public void InitTest()
{
List<byte> packet = new List<byte> ();
var bmp180 = new BMP180 ();
bmp180.Reset ();
// Check the Chip ID
packet.Add ((byte)0xFC);
packet.Add ((byte)0xD0);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] chipId = bmp180.Read ();
Assert.AreEqual (chipId[0], 0x55);
// Check the SoftReset
packet.Add ((byte)0xFC);
packet.Add ((byte)0xE0);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] softReset = bmp180.Read ();
Assert.AreEqual (softReset[0], 0);
// Check the CtrlMeasurement
packet.Add ((byte)0xFC);
packet.Add ((byte)0xF4);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] ctrlMeasurement = bmp180.Read ();
Assert.AreEqual (ctrlMeasurement[0], 0);
// Read, write and check all calibration parameters in one go
packet.Add ((byte)0xFC);
packet.Add ((byte)0xAA);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibXX = bmp180.Read ();
Assert.AreEqual(calibXX[0], 0x1B);
Assert.AreEqual(calibXX[1], 0xCB);
Assert.AreEqual(calibXX[2], 0xFB);
Assert.AreEqual(calibXX[3], 0xCD);
Assert.AreEqual(calibXX[4], 0xC6);
Assert.AreEqual(calibXX[5], 0x91);
Assert.AreEqual(calibXX[6], 0x7B);
Assert.AreEqual(calibXX[7], 0xA8);
Assert.AreEqual(calibXX[8], 0x5F);
Assert.AreEqual(calibXX[9], 0xE8);
Assert.AreEqual(calibXX[10], 0x43);
Assert.AreEqual(calibXX[11], 0x35);
Assert.AreEqual(calibXX[12], 0x15);
Assert.AreEqual(calibXX[13], 0x7A);
Assert.AreEqual(calibXX[14], 0x00);
Assert.AreEqual(calibXX[15], 0x38);
Assert.AreEqual(calibXX[16], 0x80);
Assert.AreEqual(calibXX[17], 0x00);
Assert.AreEqual(calibXX[18], 0xD4);
Assert.AreEqual(calibXX[19], 0xBD);
Assert.AreEqual(calibXX[20], 0x09);
Assert.AreEqual(calibXX[21], 0x80);
packet.Add ((byte)0xFD);
packet.Add ((byte)0xAA);
packet.Add ((byte)0xDE);
packet.Add ((byte)0xAD);
packet.Add ((byte)0xDE);
packet.Add ((byte)0xAD);
packet.Add ((byte)0xDE);
packet.Add ((byte)0xAD);
packet.Add ((byte)0xDE);
packet.Add ((byte)0xAD);
packet.Add ((byte)0xDE);
packet.Add ((byte)0xAD);
packet.Add ((byte)0xDE);
packet.Add ((byte)0xAD);
packet.Add ((byte)0xDE);
packet.Add ((byte)0xAD);
packet.Add ((byte)0xDE);
packet.Add ((byte)0xAD);
packet.Add ((byte)0xDE);
packet.Add ((byte)0xAD);
packet.Add ((byte)0xDE);
packet.Add ((byte)0xAD);
packet.Add ((byte)0xDE);
packet.Add ((byte)0xAD);
bmp180.Write (packet.ToArray ());
packet.Clear ();
packet.Add ((byte)0xFC);
packet.Add ((byte)0xAA);
bmp180.Write (packet.ToArray ());
packet.Clear ();
calibXX = bmp180.Read ();
Assert.AreEqual(calibXX[0], 0xDE);
Assert.AreEqual(calibXX[1], 0xAD);
Assert.AreEqual(calibXX[2], 0xDE);
Assert.AreEqual(calibXX[3], 0xAD);
Assert.AreEqual(calibXX[4], 0xDE);
Assert.AreEqual(calibXX[5], 0xAD);
Assert.AreEqual(calibXX[6], 0xDE);
Assert.AreEqual(calibXX[7], 0xAD);
Assert.AreEqual(calibXX[8], 0xDE);
Assert.AreEqual(calibXX[9], 0xAD);
Assert.AreEqual(calibXX[10], 0xDE);
Assert.AreEqual(calibXX[11], 0xAD);
Assert.AreEqual(calibXX[12], 0xDE);
Assert.AreEqual(calibXX[13], 0xAD);
Assert.AreEqual(calibXX[14], 0xDE);
Assert.AreEqual(calibXX[15], 0xAD);
Assert.AreEqual(calibXX[16], 0xDE);
Assert.AreEqual(calibXX[17], 0xAD);
Assert.AreEqual(calibXX[18], 0xDE);
Assert.AreEqual(calibXX[19], 0xAD);
Assert.AreEqual(calibXX[20], 0xDE);
Assert.AreEqual(calibXX[21], 0xAD);
// Reset calibration parameters
bmp180.Reset ();
// Read, write and check calibration parameters individually
packet.Add ((byte)0xFC);
packet.Add ((byte)0xAA);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibAA = bmp180.Read ();
Assert.AreEqual(calibAA[0], 0x1B);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xAB);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibAB = bmp180.Read ();
Assert.AreEqual(calibAB[0], 0xCB);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xAC);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibAC = bmp180.Read ();
Assert.AreEqual(calibAC[0], 0xFB);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xAD);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibAD = bmp180.Read ();
Assert.AreEqual(calibAD[0], 0xCD);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xAE);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibAE = bmp180.Read ();
Assert.AreEqual(calibAE[0], 0xC6);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xAF);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibAF = bmp180.Read ();
Assert.AreEqual(calibAF[0], 0x91);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xB0);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibB0 = bmp180.Read ();
Assert.AreEqual(calibB0[0], 0x7B);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xB1);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibB1 = bmp180.Read ();
Assert.AreEqual(calibB1[0], 0xA8);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xB2);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibB2 = bmp180.Read ();
Assert.AreEqual(calibB2[0], 0x5F);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xB3);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibB3 = bmp180.Read ();
Assert.AreEqual(calibB3[0], 0xE8);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xB4);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibB4 = bmp180.Read ();
Assert.AreEqual(calibB4[0], 0x43);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xB5);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibB5 = bmp180.Read ();
Assert.AreEqual(calibB5[0], 0x35);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xB6);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibB6 = bmp180.Read ();
Assert.AreEqual(calibB6[0], 0x15);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xB7);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibB7 = bmp180.Read ();
Assert.AreEqual(calibB7[0], 0x7A);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xB8);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibB8 = bmp180.Read ();
Assert.AreEqual(calibB8[0], 0x00);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xB9);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibB9 = bmp180.Read ();
Assert.AreEqual(calibB9[0], 0x38);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xBA);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibBA = bmp180.Read ();
Assert.AreEqual(calibBA[0], 0x80);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xBB);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibBB = bmp180.Read ();
Assert.AreEqual(calibBB[0], 0x00);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xBC);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibBC = bmp180.Read ();
Assert.AreEqual(calibBC[0], 0xD4);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xBD);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibBD = bmp180.Read ();
Assert.AreEqual(calibBD[0], 0xBD);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xBE);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibBE = bmp180.Read ();
Assert.AreEqual(calibBE[0], 0x09);
packet.Add ((byte)0xFC);
packet.Add ((byte)0xBF);
bmp180.Write (packet.ToArray ());
packet.Clear ();
byte[] calibBF = bmp180.Read ();
Assert.AreEqual(calibBF[0], 0x80);
}