/// <summary>
/// Gets the divisor to scale raw data based on resolution. = 1/LSB
/// </summary>
/// <param name="res">The resolution.</param>
/// <returns>System.UInt16.</returns>
/// <exception cref="ArgumentOutOfRangeException">res - null</exception>
public static ushort LsbDivisor(AdcResolution res)
{
switch (res)
{
case AdcResolution.Bit12:
return(1000);
case AdcResolution.Bit14:
return(4000);
case AdcResolution.Bit16:
return(16000);
default:
throw new ArgumentOutOfRangeException(nameof(res), res, null);
}
}
/// <summary>
/// Gets the voltage value corresponding to the least significant bit based on resolution.
/// </summary>
/// <param name="res">The resolution.</param>
/// <returns>System.Double.</returns>
/// <exception cref="ArgumentOutOfRangeException">res - null</exception>
public static double LSBValue(AdcResolution res)
{
switch (res)
{
case AdcResolution.Bit12:
return(1e-3);
case AdcResolution.Bit14:
return(250e-6);
case AdcResolution.Bit16:
return(62.5e-6);
default:
throw new ArgumentOutOfRangeException(nameof(res), res, null);
}
}
public static int UpdateFrequency(AdcResolution res)
{
switch (res)
{
case AdcResolution.Bit12:
return(240);
case AdcResolution.Bit14:
return(60);
case AdcResolution.Bit16:
return(15);
default:
throw new ArgumentOutOfRangeException(nameof(res), res, null);
}
}
/// <summary>
/// Constructs Mcp3427 instance
/// </summary>
/// <param name="i2CDevice">I2C device used to communicate with the device</param>
/// <param name="mode">ADC operation mode</param>
/// <param name="resolution">ADC resolution</param>
/// <param name="pgaGain">PGA gain</param>
public Mcp3427(I2cDevice i2CDevice, AdcMode mode = AdcMode.Continuous, AdcResolution resolution = AdcResolution.Bit12, AdcGain pgaGain = AdcGain.X1)
: this(i2CDevice)
{
SetConfig(0, mode: mode, resolution: resolution, pgaGain: pgaGain);
}
/// <summary>
/// Constructs ConversionResult instance
/// </summary>
/// <param name="channel">ADC channel</param>
/// <param name="rawData">Raw ADC value</param>
/// <param name="resolution">ADC resolution</param>
public ConversionResult(byte channel, short rawData, AdcResolution resolution)
{
Channel = channel;
RawValue = rawData;
VoltageDivisor = Helpers.LsbDivisor(resolution);
}
/// <summary>
/// Gets the voltage value corresponding to the least significant bit based on resolution.
/// </summary>
/// <param name="res">The resolution.</param>
/// <returns>System.Double.</returns>
/// <exception cref="ArgumentOutOfRangeException">res - null</exception>
public static double LSBValue(AdcResolution res) => res switch
{
public static byte SetResolutionBits(byte configByte, AdcResolution resolution)
{
return((byte)((configByte & ~Helpers.Masks.ResolutionMask) | (byte)resolution));
}
