Struct Calibration 

pub struct Calibration {
    pub ts_cal1: u16,
    pub ts_cal2: u16,
    pub vrefint_cal: u16,
}

Factory calibration values read from the DESIG peripheral.

These values are programmed during manufacturing and can be used for accurate temperature and voltage measurements.

Fields

ts_cal1: u16

Temperature sensor calibration value at 30°C (12-bit).

ts_cal2: u16

Temperature sensor calibration value at 130°C (12-bit).

vrefint_cal: u16

Internal voltage reference calibration value (12-bit). Measured at VDDA = 3.0V.

Implementations

impl Calibration

pub fn read() -> Self

Read factory calibration values from the DESIG and VREFINTCAL peripherals.

These values are unique to each chip and were measured during manufacturing at VDDA = 3.0V.

pub fn convert_to_millicelsius(&self, ts_data: u32, vrefint_data: u32) -> i32

Convert a temperature sensor ADC reading to temperature in millidegrees Celsius.

This function applies VDDA compensation using the VREFINT reading to account for differences between the actual supply voltage and the 3.0V calibration voltage.

Arguments

• ts_data - Raw ADC reading from the temperature sensor channel
• vrefint_data - Raw ADC reading from the VREFINT channel (for VDDA compensation)

Returns

Temperature in millidegrees Celsius (e.g., 25000 = 25.000°C)

Example

let cal = Calibration::read();
let temp_mc = cal.convert_to_millicelsius(temp_adc_reading, vrefint_adc_reading);
let temp_c = temp_mc / 1000;
let temp_frac = (temp_mc % 1000).unsigned_abs();
info!("Temperature: {}.{:03} C", temp_c, temp_frac);

pub fn calculate_vdda_mv(&self, vrefint_data: u32) -> u32

Calculate the actual VDDA voltage in millivolts using VREFINT.

The formula is: VDDA = 3000mV × VREFINT_CAL / VREFINT_DATA

Arguments

• vrefint_data - Raw ADC reading from the VREFINT channel

Returns

Actual VDDA voltage in millivolts

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 Debug for Calibration

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

Formats the value using the given formatter.

impl Format for Calibration

fn format(&self, f: Formatter<'_>)

Writes the defmt representation of self to fmt.

impl Copy for Calibration