scl3300 0.5.0

Driver for the SCL3300 inclinometer.
Documentation 
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use core::{num::NonZeroU32, ops::RangeInclusive};

/// A measurement mode.
#[derive(Debug, Clone, Copy, PartialEq)]
pub enum MeasurementMode {
  /// 1.2g full-scale,
  /// 40 Hz first-order low-pass filter
  FullScale12,
  /// 2.4g full-scale,
  /// 70 Hz first-order low-pass filter
  FullScale24,
  /// Inclination mode,
  /// 10 Hz first-order low-pass filter
  Inclination,
  /// Inclination (low noise) mode,
  /// 10 Hz first-order low-pass filter,
  InclinationLowNoise,
}

impl Default for MeasurementMode {
  fn default() -> Self {
    Self::new()
  }
}

impl MeasurementMode {
  pub(crate) const fn new() -> Self {
    Self::FullScale12
  }

  pub(crate) const fn self_test_thresholds(&self) -> RangeInclusive<i16> {
    match self {
      Self::FullScale12 => -1800..=1800,
      Self::FullScale24 => -900..=900,
      Self::Inclination | Self::InclinationLowNoise => -3600..=3600,
    }
  }

  pub(crate) const fn acceleration_sensitivity(&self) -> u16 {
    match self {
      Self::FullScale12 => 6000,
      Self::FullScale24 => 3000,
      Self::Inclination | Self::InclinationLowNoise => 12000,
    }
  }

  pub(crate) const fn start_up_wait_time_ns(&self) -> NonZeroU32 {
    const T_25_MS: NonZeroU32 = match NonZeroU32::new(25_000_000) {
      Some(v) => v,
      None => unreachable!(),
    };
    const T_15_MS: NonZeroU32 = match NonZeroU32::new(15_000_000) {
      Some(v) => v,
      None => unreachable!(),
    };
    const T_100_MS: NonZeroU32 = match NonZeroU32::new(100_000_000) {
      Some(v) => v,
      None => unreachable!(),
    };

    match self {
      MeasurementMode::FullScale12 => T_25_MS,
      MeasurementMode::FullScale24 => T_15_MS,
      MeasurementMode::Inclination | MeasurementMode::InclinationLowNoise => T_100_MS,
    }
  }
}