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52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2021 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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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "esp_err.h"
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/**
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* @brief For I2S dma to claim the usage of ADC1.
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*
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* Other tasks will be forbidden to use ADC1 between ``adc1_dma_mode_acquire`` and ``adc1_i2s_release``.
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* The I2S module may have to wait for a short time for the current conversion (if exist) to finish.
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_TIMEOUT reserved for future use. Currently the function will wait until success.
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*/
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esp_err_t adc1_dma_mode_acquire(void);
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/**
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* @brief For ADC1 to claim the usage of ADC1.
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*
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* Other tasks will be forbidden to use ADC1 between ``adc1_rtc_mode_acquire`` and ``adc1_i2s_release``.
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* The ADC1 may have to wait for some time for the I2S read operation to finish.
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_TIMEOUT reserved for future use. Currently the function will wait until success.
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*/
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esp_err_t adc1_rtc_mode_acquire(void);
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/**
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* @brief to let other tasks use the ADC1 when I2S is not work.
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*
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* Other tasks will be forbidden to use ADC1 between ``adc1_adc/i2s_mode_acquire`` and ``adc1_i2s_release``.
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* Call this function to release the occupation of ADC1
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*
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* @return always return ESP_OK.
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*/
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esp_err_t adc1_lock_release(void);
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#ifdef __cplusplus
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}
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#endif
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