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esp_adc_cal_get_voltage() function
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.
Syntax
esp_err_t esp_adc_cal_get_voltage(adc_channel_t channel,
const esp_adc_cal_characteristics_t *chars,
uint32_t *voltage);
Implemented in ![]()
esp_adc_cal_common_legacy.c:25
Return value
- ESP_OK: ADC read and converted to mV - ESP_ERR_INVALID_ARG: Error due to invalid arguments - ESP_ERR_INVALID_STATE: Reading result is invalid. Try to read again.
Notes
The Characteristics structure must be initialized before this function is called (call esp_adc_cal_characterize())
References
Code
Location
Call Tree
esp_adc_cal_get_voltage() calls 5 functions:
Data Use
esp_adc_cal_get_voltage() reads 9 variables: