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57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2022 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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// DO NOT USE THESE APIS IN YOUR APPLICATIONS
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// The following APIs are for internal use, public to other IDF components, but not for users' applications.
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#pragma once
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#include "esp_err.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Hold the I2S port occupation
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*
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* @note This private API is used to avoid applications from using the same I2S instance for different purpose.
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* @note This function will help enable the peripheral APB clock as well.
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*
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* @param id I2S port number
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* @param comp_name The name of compnant that occupied this i2s controller
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* @return
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* - ESP_OK: The specific I2S port is free and register the new device object successfully
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* - ESP_ERR_INVALID_ARG: Invalid argument, e.g. wrong port_id
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* - ESP_ERR_NOT_FOUND Specific I2S port is not available
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*/
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esp_err_t i2s_platform_acquire_occupation(int id, const char *comp_name);
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/**
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* @brief Release the I2S port occupation
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*
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* @note This function will help disable the peripheral APB clock as well.
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*
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* @param id I2S port number
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* @return
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* - ESP_OK: Deregister I2S port successfully (i.e. that I2S port can used used by other users after this function returns)
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* - ESP_ERR_INVALID_ARG: Invalid argument, e.g. wrong port_id
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* - ESP_ERR_INVALID_STATE: Specific I2S port is free already
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*/
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esp_err_t i2s_platform_release_occupation(int id);
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/**
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* @brief This function is only used for getting DMA buffer offset in `test_i2s_iram.c`
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*
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* @return
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* - The offset of DMA buffers in the `i2s_chan_handle_t` struct (unit: bytes)
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*/
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size_t i2s_platform_get_dma_buffer_offset(void);
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#ifdef __cplusplus
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}
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#endif
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