esp-idf/components/driver/dac/dac_priv_dma.h

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/*
* SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include "esp_err.h"
#include "esp_intr_alloc.h"
#ifdef __cplusplus
extern "C" {
#endif
#define DAC_DMA_EOF_INTR 0x01
#define DAC_DMA_TEOF_INTR 0x02
/**
* @brief Initialize DAC DMA peripheral
*
* @param[in] freq_hz DAC data frequency per channel
* @param[in] is_alternate Transmit data alternate between two channels or simultaneously
* @param[in] is_apll Whether use APLL as DAC digital controller clock source
* @return
* - ESP_ERR_NOT_FOUND The DMA peripheral has been occupied
* - ESP_ERR_NO_MEM No memory for the DMA peripheral struct
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* - ESP_ERR_INVALID_ARG The frequency is out of range
* - ESP_OK Initialize DAC DMA peripheral success
*/
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esp_err_t dac_dma_periph_init(uint32_t freq_hz, bool is_alternate, bool is_apll);
/**
* @brief Deinitialize DAC DMA peripheral
*
* @return
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* - ESP_ERR_INVALID_STATE The DAC DMA has been de-initialized already
* or the interrupt has not been de-registered
* - ESP_OK Deinitialize DAC DMA peripheral success
*/
esp_err_t dac_dma_periph_deinit(void);
/**
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* @brief Get the DMA interrupt signal id
*
* @return
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* - int DMA interrupt signal id
*/
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int dac_dma_periph_get_intr_signal(void);
/**
* @brief Enable the DMA and interrupt of the DAC DMA peripheral
*
*/
void dac_dma_periph_enable(void);
/**
* @brief Disable the DMA and interrupt of the DAC DMA peripheral
*
*/
void dac_dma_periph_disable(void);
/**
* @brief Whether the TX_EOF interrupt is triggered
*
* @return
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* - uint32_t Mask of the triggered interrupt: DAC_DMA_EOF_INTR, DAC_DMA_EOF_INTR
*/
uint32_t dac_dma_periph_intr_is_triggered(void);
/**
* @brief Get the descriptor that just finished sending data
*
* @return
* - uint32_t The address of the EOF descriptor
*/
uint32_t dac_dma_periph_intr_get_eof_desc(void);
/**
* @brief Start a DMA transaction
* @note DMA transaction will stop when reaches the tail of the descriptor link
*
* @param[in] desc_addr Descriptor address
*/
void dac_dma_periph_dma_trans_start(uint32_t desc_addr);
#ifdef __cplusplus
}
#endif