1 /* 2 * SPDX-FileCopyrightText: 2020-2021 Espressif Systems (Shanghai) CO LTD 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #include <esp_types.h> 8 #include <esp_err.h> 9 10 #ifdef __cplusplus 11 extern "C" { 12 #endif 13 14 //This is the ADC calibration value version burnt in efuse 15 #define ESP_EFUSE_ADC_CALIB_VER 1 16 17 /** 18 * @brief Get the RTC calibration efuse version 19 * 20 * @return Version of the stored efuse 21 */ 22 int esp_efuse_rtc_calib_get_ver(void); 23 24 /** 25 * @brief Get the init code in the efuse, for the corresponding attenuation. 26 * 27 * @param version Version of the stored efuse 28 * @param adc_unit ADC unit. Not used, for compatibility. On esp32c3, for calibration v1, both ADC units use the same init code (calibrated by ADC1) 29 * @param atten Attenuation of the init code 30 * @return The init code stored in efuse 31 */ 32 uint32_t esp_efuse_rtc_calib_get_init_code(int version, uint32_t adc_unit, int atten); 33 34 /** 35 * @brief Get the calibration digits stored in the efuse, and the corresponding voltage. 36 * 37 * @param version Version of the stored efuse 38 * @param atten Attenuation to use 39 * @param out_digi Output buffer of the digits 40 * @param out_vol_mv Output of the voltage, in mV 41 * @return 42 * - ESP_ERR_INVALID_ARG: If efuse version or attenuation is invalid 43 * - ESP_OK: if success 44 */ 45 esp_err_t esp_efuse_rtc_calib_get_cal_voltage(int version, int atten, uint32_t* out_digi, uint32_t* out_vol_mv); 46 47 /** 48 * @brief Get the temperature sensor calibration number delta_T stored in the efuse. 49 * 50 * @param version Version of the stored efuse 51 * 52 * @return The specification of temperature sensor calibration number in efuse. 53 */ 54 float esp_efuse_rtc_calib_get_cal_temp(int version); 55 56 #ifdef __cplusplus 57 } 58 #endif 59
