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42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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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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