2021-05-23 23:50:04 +00:00
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/*
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* SPDX-FileCopyrightText: 2020-2021 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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2020-12-23 04:29:57 +00:00
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// Internal header for calibration, don't use in app
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#include "sdkconfig.h"
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#include "esp_err.h"
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#include "hal/adc_hal.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if !CONFIG_IDF_TARGET_ESP32
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/**
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* @brief Calibrate the offset of ADC. (Based on the pre-stored efuse or actual calibration)
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*
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* @param adc_n ADC unit to calibrate
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* @param channel Target channel if really do calibration
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* @param atten Attenuation to use
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* @return Always ESP_OK
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*/
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extern esp_err_t adc_cal_offset(adc_ll_num_t adc_n, adc_channel_t channel, adc_atten_t atten);
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#endif
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#ifdef __cplusplus
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}
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#endif
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