ESP-IDF
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Outline
#include "esp_err.h"
#include "esp_intr_alloc.h"
#define DAC_DMA_EOF_INTR
#define DAC_DMA_TEOF_INTR
dac_dma_periph_init(uint32_t, bool, bool);
dac_dma_periph_deinit();
dac_dma_periph_get_intr_signal();
dac_dma_periph_enable();
dac_dma_periph_disable();
dac_dma_periph_intr_is_triggered();
dac_dma_periph_intr_get_eof_desc();
dac_dma_periph_dma_trans_start(uint32_t);
Files
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/esp_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 * - ESP_ERR_INVALID_ARG The frequency is out of range * - ESP_OK Initialize DAC DMA peripheral success *//* ... */ esp_err_t dac_dma_periph_init(uint32_t freq_hz, bool is_alternate, bool is_apll); /** * @brief Deinitialize DAC DMA peripheral * * @return * - 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); /** * @brief Get the DMA interrupt signal id * * @return * - int DMA interrupt signal id *//* ... */ 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 * - 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
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