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https://github.com/espressif/esp-idf.git
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91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/*
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* SPDX-FileCopyrightText: 2019-2022 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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#pragma once
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#include "esp_err.h"
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#include "esp_intr_alloc.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define DAC_DMA_EOF_INTR 0x01
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#define DAC_DMA_TEOF_INTR 0x02
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/**
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* @brief Initialize DAC DMA peripheral
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*
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* @param[in] freq_hz DAC data frequency per channel
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* @param[in] is_alternate Transmit data alternate between two channels or simultaneously
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* @param[in] is_apll Whether use APLL as DAC digital controller clock source
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* @return
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* - ESP_ERR_NOT_FOUND The DMA peripheral has been occupied
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* - 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
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* - ESP_OK Initialize DAC DMA peripheral success
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*/
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esp_err_t dac_dma_periph_init(uint32_t freq_hz, bool is_alternate, bool is_apll);
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/**
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* @brief Deinitialize DAC DMA peripheral
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*
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* @return
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* - ESP_ERR_INVALID_STATE The DAC DMA has been de-initialized already
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* or the interrupt has not been de-registered
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* - ESP_OK Deinitialize DAC DMA peripheral success
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*/
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esp_err_t dac_dma_periph_deinit(void);
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/**
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* @brief Get the DMA interrupt signal id
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*
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* @return
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* - int DMA interrupt signal id
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*/
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int dac_dma_periph_get_intr_signal(void);
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/**
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* @brief Enable the DMA and interrupt of the DAC DMA peripheral
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*
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*/
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void dac_dma_periph_enable(void);
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/**
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* @brief Disable the DMA and interrupt of the DAC DMA peripheral
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*
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*/
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void dac_dma_periph_disable(void);
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/**
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* @brief Whether the TX_EOF interrupt is triggered
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*
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* @return
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* - uint32_t Mask of the triggered interrupt: DAC_DMA_EOF_INTR, DAC_DMA_EOF_INTR
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*/
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uint32_t dac_dma_periph_intr_is_triggered(void);
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/**
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* @brief Get the descriptor that just finished sending data
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*
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* @return
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* - uint32_t The address of the EOF descriptor
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*/
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uint32_t dac_dma_periph_intr_get_eof_desc(void);
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/**
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* @brief Start a DMA transaction
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* @note DMA transaction will stop when reaches the tail of the descriptor link
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*
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* @param[in] desc_addr Descriptor address
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*/
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void dac_dma_periph_dma_trans_start(uint32_t desc_addr);
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#ifdef __cplusplus
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}
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#endif
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