Struct Calibration 

pub struct Calibration { /* private fields */ }

The per-chip calibration coefficients read from the sensor’s calibration registers.

These are factory-programmed and constant for a given device, so they are read once at start-up and reused for every measurement.

Implementations

impl Calibration

pub fn from_registers(temp_press: &[u8; 26], humidity: &[u8; 7]) -> Calibration

Parses the calibration coefficients from the two register blocks.

The split-and-shifted packing of dig_h4 and dig_h5, which share a byte, is done exactly as the datasheet specifies.

Arguments

• temp_press - the 26 bytes read from 0x88..=0xA1.
• humidity - the 7 bytes read from 0xE1..=0xE7.

Returns

The decoded calibration.

pub fn compensate(&self, raw: &RawMeasurement) -> Measurement

Compensates a raw measurement into temperature, pressure, and humidity.

Temperature is computed first because its intermediate t_fine term feeds the pressure and humidity formulas, exactly as the reference code shares it.

Arguments

• raw - the uncompensated readings from the data registers.

Returns

The compensated Measurement.

impl Calibration

pub fn to_registers(&self) -> ([u8; 26], [u8; 7])

Packs the coefficients back into the two register blocks.

This is the inverse of from_registers, so a test can build what a part with these coefficients holds in its calibration registers. Byte 24 of the first block (register 0xA0) is not a coefficient and is written as zero.

Returns

The 26 bytes of 0x88..=0xA1 and the 7 bytes of 0xE1..=0xE7.

Trait Implementations

impl Clone for Calibration

fn clone(&self) -> Calibration

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Calibration

impl Debug for Calibration

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Calibration

impl PartialEq for Calibration

fn eq(&self, other: &Calibration) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Calibration