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32 lines
1.1 KiB
C
32 lines
1.1 KiB
C
/*
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* SPDX-FileCopyrightText: 2016-2021 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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/* This file is used to get `adc2_init_code_calibration` executed before the APP when the ADC2 is used by Wi-Fi or other drivers.
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The linker will link constructor (adc2_init_code_calibration) only when any sections inside the same file (adc2_cal_include) is used.
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Don't put any other code into this file. */
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#include "adc2_wifi_private.h"
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#include "hal/adc_hal.h"
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#include "esp_private/adc_cali.h"
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/**
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* @brief Set initial code to ADC2 after calibration. ADC2 RTC and ADC2 PWDET controller share the initial code.
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* This API be called in before `app_main()`.
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*/
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static __attribute__((constructor)) void adc2_init_code_calibration(void)
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{
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const adc_ll_num_t adc_n = ADC_NUM_2;
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const adc_atten_t atten = ADC_ATTEN_DB_11;
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const adc_channel_t channel = 0;
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adc_cal_offset(adc_n, channel, atten);
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}
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/** Don't call `adc2_cal_include` in user code. */
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void adc2_cal_include(void)
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{
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/* When this empty function is called, the `adc2_init_code_calibration` constructor will be linked and executed before the app.*/
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}
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