private ushort[] runCommand(SGPCommand cmd, ushort[] parameters = null)
{
bus.SetDevice(this.address);
var bytesToWrite = new byte[cmd.OpCode.Length + (cmd.ParameterLength * (WORD_LENGTH + CRC_LENGTH))];
if (cmd.ParameterLength > 0 && parameters?.Length != cmd.ParameterLength)
{
throw new ArgumentException(nameof(parameters));
}
Array.Copy(cmd.OpCode, 0, bytesToWrite, 0, cmd.OpCode.Length);
if (parameters != null)
{
foreach (var i in Enumerable.Range(0, parameters.Length))
{
Span <byte> span = bytesToWrite.AsSpan().Slice(i * (WORD_LENGTH + CRC_LENGTH) + cmd.OpCode.Length, (WORD_LENGTH + CRC_LENGTH));
span[0] = (byte)(parameters[i] >> 8);
span[1] = (byte)(parameters[i] & 0xFF);
span[2] = CRC(span.Slice(0, WORD_LENGTH));
}
}
var argBytes = bytesToWrite.AsSpan(1);
bus.WriteI2cBlockData(bytesToWrite[0], argBytes.ToArray());
Thread.Sleep(cmd.ResponseTimeMs);
if (cmd.ResponseLength > 0)
{
var data = new byte[cmd.ResponseLength * (WORD_LENGTH + CRC_LENGTH)];
bus.ReadI2cBlockData(0, data);
ushort[] result = ReadCheckSummedWords(data);
return(result);
}
return(Array.Empty <ushort>());
}
private byte[] runCommand(byte command, int resultLength)
{
bus.SetDevice(this.address);
bus.WriteData(new byte[] { command });
if (resultLength > 0)
{
byte[] result = new byte[resultLength];
bus.ReadData(result);
return(result);
}
return(Array.Empty <byte>());
}
public BME280(I2CBus bus, int address = DEFAULTADDRESS)
{
this.bus = bus;
this.address = address;
bus.SetDevice(this.address);
var chipId = new byte[1];
bus.WriteData(new byte[] { 0xD0 });
bus.ReadData(chipId);
System.Console.WriteLine($"Chip id = {chipId[0]} Expected {CHIPID}");
this.getCalibrationData();
this.getHumidityCalibrationData();
}
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
I2CBus bus = new I2CBus();
bus.Open("/dev/i2c-1");
bus.SetDevice(0x58);
SGP30 sensor = new SGP30(bus);
string str = sensor.GetSerialNumber();
Console.WriteLine($"SGP30 Serial number: {str}");
sensor.InitAirQuality();
var baseLine = sensor.GetBaseline();
Console.WriteLine($"Baseline: {baseLine.Raw_CO2} {baseLine.Raw_VOC}");
//sensor.SetBaseline(0, 0); values are only available after 12 hours or something so no clue
// what a valid baseline is
// while (true)
// {
// var result = sensor.MeasureAirQuality();
// Console.WriteLine($"{DateTime.Now} {result.CO2_PartsPerMillion}");
// Thread.Sleep(1000);
// }
BME280 sensor2 = new BME280(bus, 0x76);
while (true)
{
var temperature = sensor2.ReadTemperature();
Console.WriteLine($"{DateTime.Now} Temperature: {temperature}");
Thread.Sleep(1000);
}
}
