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esp_adc_cal_characteristics_t struct
Structure storing characteristics of an ADC
Syntax
typedef struct
{
adc_unit_t adc_num;
adc_atten_t atten;
adc_bits_width_t bit_width;
uint32_t coeff_a;
uint32_t coeff_b;
uint32_t vref;
const uint32_t *low_curve;
const uint32_t *high_curve;
uint8_t version;
} esp_adc_cal_characteristics_t;
Fields
Field
Declared as
Description
const uint32_t *
Pointer to low Vref curve of lookup table (NULL if unused).
const uint32_t *
Pointer to high Vref curve of lookup table (NULL if unused).
Related Functions
Found 3 other functions taking a esp_adc_cal_characteristics_t
argument:
Function
Description
Convert an ADC reading to voltage in mV This function converts an ADC reading to a voltage in mV based on the ADC's characteristics.
Reads an ADC and converts the reading to a voltage in mV This function reads an ADC then converts the raw reading to a voltage in mV based on the characteristics provided. The ADC that is read is also determined by the characteristics.
Characterize an ADC at a particular attenuation This function will characterize the ADC at a particular attenuation and generate the ADC-Voltage curve in the form of [y = coeff_a * x + coeff_b]. Characterization can be based on Two Point values, eFuse Vref, or default Vref and the calibration values will be prioritized in that order.