/// <summary>
/// Read sensor in single-shot mode.
/// </summary>
/// <param name="setting"></param>
/// <returns></returns>
public async Task <ADS1115SensorData> readSingleShot(ADS1115SensorSetting setting)
{
if (setting.Mode != AdcMode.SINGLESHOOT_CONVERSION)
{
throw new InvalidOperationException("You can only read in single shot mode");
}
var sensorData = new ADS1115SensorData();
int temp = await ReadSensorAsync(configA(setting), configB(setting)); //read sensor with the generated configuration bytes
sensorData.DecimalValue = temp;
//calculate the voltage with different resolutions in single ended and in differential mode
if ((byte)setting.Input <= 0x03)
{
sensorData.VoltageValue = DecimalToVoltage(setting.Pga, temp, ADC_RES);
}
else
{
sensorData.VoltageValue = DecimalToVoltage(setting.Pga, temp, ADC_HALF_RES);
}
fastReadAvailable = false;
return(sensorData);
}
/// <summary>
/// You have to initialize before use readContinuous and you have to do it every time when you write into the configuration register.
/// </summary>
/// <param name="setting"></param>
/// <returns></returns>
public async Task readContinuousInit(ADS1115SensorSetting setting)
{
if (setting.Mode != AdcMode.CONTINOUS_CONVERSION)
{
throw new InvalidOperationException("You can only read in continuous mode");
}
var command = new byte[] { ADC_REG_POINTER_CONFIG, configA(setting), configB(setting) };
adc.Write(command);
await Task.Delay(10);
var writeBuffer = new byte[] { ADC_REG_POINTER_CONVERSION };
adc.Write(writeBuffer);
fastReadAvailable = true;
}
// creates the second byte of the configuration register from the ADS1115SensorSetting object
private byte configB(ADS1115SensorSetting setting)
{
byte configB;
return(configB = (byte)((byte)setting.DataRate << 5 | (byte)setting.ComMode << 4 | (byte)setting.ComPolarity << 3 | (byte)setting.ComLatching << 2 | (byte)setting.ComQueue));
}
// creates the byte byte of the configuration register from the ADS1115SensorSetting object
private byte configA(ADS1115SensorSetting setting)
{
byte configA = 0;
return(configA = (byte)((byte)setting.Mode << 7 | (byte)setting.Input << 4 | (byte)setting.Pga << 1 | (byte)setting.Mode));
}
