mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
0ad3017df7
1. move btif and A2DP source code from project directory to bluetooth directory; 2. some updates of audio source code;
128 lines
2.9 KiB
C
128 lines
2.9 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef _DRIVER_DMA_H_
|
|
#define _DRIVER_DMA_H__
|
|
#include <esp_types.h>
|
|
|
|
#include "esp_err.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/** \defgroup Driver_APIs Driver APIs
|
|
* @brief Driver APIs
|
|
*/
|
|
|
|
/** @addtogroup Driver_APIs
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief DMA queue description.
|
|
*/
|
|
typedef struct {
|
|
uint32_t block_size: 12;
|
|
uint32_t data_length: 12;
|
|
uint32_t unused: 5;
|
|
uint32_t sub_sof: 1;
|
|
uint32_t eof: 1;
|
|
uint32_t owner: 1;
|
|
uint32_t buf_ptr;
|
|
uint32_t next_link_ptr;
|
|
} dma_queue_t;
|
|
|
|
/**
|
|
* @brief DMA element description
|
|
*/
|
|
typedef struct {
|
|
uint32_t *buffer_addr;
|
|
dma_queue_t *first_queue;
|
|
dma_queue_t *last_queue;
|
|
dma_queue_t backup_queue;
|
|
} dma_element_t;
|
|
|
|
/**
|
|
* @brief DMA ping-pong buffer object description
|
|
*/
|
|
typedef struct {
|
|
dma_element_t *ping;
|
|
dma_element_t *pong;
|
|
uint32_t len;
|
|
uint32_t queue_cnt;
|
|
} ping_pong_buf_t;
|
|
|
|
|
|
/**
|
|
* @brief Create a ping-pong buffer object used by DMA.
|
|
*
|
|
* @param [in] bufLen
|
|
* Set the buffer length.
|
|
* --------------------
|
|
* | ping | Pong |
|
|
* --------------------
|
|
* | bufLen | bufLen |
|
|
* --------------------
|
|
*
|
|
* @return uint32*, NULL:indicates parameter error, others indicates ping-pong buffer address.
|
|
*/
|
|
ping_pong_buf_t* dma_buf_create(uint32_t bufLen);
|
|
|
|
/**
|
|
* @brief Reset the dma buffer length.
|
|
*
|
|
* @param [in] obj
|
|
* Pointer to a struct ping_pong_buf_t that indicates the object length to be reset to bufLen.
|
|
*
|
|
* @return uint32*, ESP_FAIL:indicates parameter error, ESP_OK :indicates success.
|
|
*/
|
|
esp_err_t dma_buf_len_reset(ping_pong_buf_t *obj);
|
|
|
|
/**
|
|
* @brief Set the buffer length before the start.
|
|
*
|
|
* @param [in] obj
|
|
* Pointer to a struct spi_dma_attr_t.
|
|
* @param [in] len
|
|
* Set the transmit length .
|
|
*
|
|
* @return uint32*, ESP_FAIL:indicates parameter error, ESP_OK: indicates success.
|
|
*/
|
|
esp_err_t dma_buf_len_set(ping_pong_buf_t *obj, dma_element_t *element, uint32_t len);
|
|
|
|
/**
|
|
* @brief Destroy the ping-pong buffer instance.
|
|
*
|
|
* @param [in] obj
|
|
* Pointer to a struct ping_pong_buf_t that indicates the object to be destroy.
|
|
*
|
|
* @return NULL
|
|
*/
|
|
void dma_buf_destroy(ping_pong_buf_t *obj);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif // __DMA_H__
|