/// <summary>
/// Exctract data from raw byte response.
/// </summary>
/// <param name="cal1">First word.</param>
/// <param name="cal2">Second word.</param>
/// <param name="cal3">Third word.</param>
/// <returns>Sensor digit dictionary.</returns>
public static Dictionary <SensorDigit, int> ExtractcalibrationData(byte[] cal1, byte[] cal2, byte[] cal3)
{
var calibrationData = new Dictionary <SensorDigit, int>(18)
{
{ SensorDigit.DigitT1, ByteOperations.GetUShort(cal1, 0) },
{ SensorDigit.DigitT2, ByteOperations.GetShort(cal1, 2) },
{ SensorDigit.DigitT3, ByteOperations.GetShort(cal1, 4) },
{ SensorDigit.DigitP1, ByteOperations.GetUShort(cal1, 6) },
{ SensorDigit.DigitP2, ByteOperations.GetShort(cal1, 8) },
{ SensorDigit.DigitP3, ByteOperations.GetShort(cal1, 10) },
{ SensorDigit.DigitP4, ByteOperations.GetShort(cal1, 12) },
{ SensorDigit.DigitP5, ByteOperations.GetShort(cal1, 14) },
{ SensorDigit.DigitP6, ByteOperations.GetShort(cal1, 16) },
{ SensorDigit.DigitP7, ByteOperations.GetShort(cal1, 18) },
{ SensorDigit.DigitP8, ByteOperations.GetShort(cal1, 20) },
{ SensorDigit.DigitP9, ByteOperations.GetShort(cal1, 22) },
{ SensorDigit.DigitH1, ByteOperations.GetUChar(cal2, 0) },
{ SensorDigit.DigitH2, ByteOperations.GetUShort(cal3, 0) },
{ SensorDigit.DigitH3, ByteOperations.GetUChar(cal3, 2) },
{ SensorDigit.DigitH4, CalculateH4Offset(cal3, 3, 4) },
{ SensorDigit.DigitH5, CalculateH5Offset(cal3, 4, 5) },
{ SensorDigit.DigitH6, ByteOperations.GetChar(cal3, 6) },
};
return(calibrationData);
}
/// <inheritdoc/>
public override void Initialize()
{
this.LogStartInitialization();
this.Device = this.Controller.GetI2CConnection(this.DeviceId);
var resetCommand = new byte[] { CCS811SWRESET, 0x11, 0xE5, 0x72, 0x8A };
this.Device.Write(resetCommand);
Thread.Sleep(100);
byte hwId = (byte)ByteOperations.GetUChar(this.ReadRawByte(CCS811HWID));
if (hwId != CCS811ID)
{
throw new System.Exception(string.Format("Incorrect ID, expected {0}, got {1}", CCS811HWID, hwId));
}
// check internal status
this.CheckError("Init");
// app valid
var status = this.ReadRawByte(CCS811STATUS);
this.LogMessage(string.Format("Status afer INIT OK? {0}", status == 16));
if ((status & 1) << 4 != 0)
{
this.CheckError("App not valid");
}
this.Device.WriteByte(CCS811APPSTART);
Thread.Sleep(100);
this.CheckError("Start");
this.WriteByte(CCS811MEASMODE, CCS811MEAS1S);
this.CheckError("MEAS");
Thread.Sleep(1500);
var bytes = this.ReadRawBytes(CCS811BASELINE, 2);
this.LogMessage(string.Format("Baseline: {0}", (bytes[0] << 8) | bytes[1]));
// data availabe?
this.LogMessage(string.Format("Data available: {0}", !((this.ReadRawByte(CCS811STATUS) & 1) << 3 == 0)));
this.CheckError("READ");
this.LogMessage("Warm up");
for (int i = 0; i < this.warmupCount; i++)
{
var data = this.ReadRawBytes(CCS811ALGRESULTDATA, 4);
this.LogMessage($"RawBytes: {ByteOperations.PrintByteArray(data)}");
Thread.Sleep(5000);
}
this.CheckError("WARMUP");
this.LogMessage("CCS811 Ready");
this.LogStartSuccess();
}