mirror of
https://github.com/espressif/esp-idf.git
synced 2024-09-21 06:56:11 -04:00
331 lines
14 KiB
C
331 lines
14 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2020-2021 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
// DO NOT USE THESE APIS IN ANY APPLICATIONS
|
|
// GDMA driver is not public for end users, but for ESP-IDF developpers.
|
|
|
|
#pragma once
|
|
|
|
#include <stdbool.h>
|
|
#include "soc/gdma_channel.h"
|
|
#include "esp_err.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* @brief Type of GDMA channel handle
|
|
*
|
|
*/
|
|
typedef struct gdma_channel_t *gdma_channel_handle_t;
|
|
|
|
/**
|
|
* @brief Enumeration of peripherals which have the DMA capability
|
|
* @note Some peripheral might not be available on certain chip, please refer to `soc_caps.h` for detail.
|
|
*
|
|
*/
|
|
typedef enum {
|
|
GDMA_TRIG_PERIPH_M2M, /*!< GDMA trigger peripheral: M2M */
|
|
GDMA_TRIG_PERIPH_UART, /*!< GDMA trigger peripheral: UART */
|
|
GDMA_TRIG_PERIPH_SPI, /*!< GDMA trigger peripheral: SPI */
|
|
GDMA_TRIG_PERIPH_I2S, /*!< GDMA trigger peripheral: I2S */
|
|
GDMA_TRIG_PERIPH_AES, /*!< GDMA trigger peripheral: AES */
|
|
GDMA_TRIG_PERIPH_SHA, /*!< GDMA trigger peripheral: SHA */
|
|
GDMA_TRIG_PERIPH_ADC, /*!< GDMA trigger peripheral: ADC */
|
|
GDMA_TRIG_PERIPH_DAC, /*!< GDMA trigger peripheral: DAC */
|
|
GDMA_TRIG_PERIPH_LCD, /*!< GDMA trigger peripheral: LCD */
|
|
GDMA_TRIG_PERIPH_CAM, /*!< GDMA trigger peripheral: CAM */
|
|
GDMA_TRIG_PERIPH_RMT, /*!< GDMA trigger peripheral: RMT */
|
|
} gdma_trigger_peripheral_t;
|
|
|
|
/**
|
|
* @brief Enumeration of GDMA channel direction
|
|
*
|
|
*/
|
|
typedef enum {
|
|
GDMA_CHANNEL_DIRECTION_TX, /*!< GDMA channel direction: TX */
|
|
GDMA_CHANNEL_DIRECTION_RX, /*!< GDMA channel direction: RX */
|
|
} gdma_channel_direction_t;
|
|
|
|
/**
|
|
* @brief Collection of configuration items that used for allocating GDMA channel
|
|
*
|
|
*/
|
|
typedef struct {
|
|
gdma_channel_handle_t sibling_chan; /*!< DMA sibling channel handle (NULL means having sibling is not necessary) */
|
|
gdma_channel_direction_t direction; /*!< DMA channel direction */
|
|
struct {
|
|
int reserve_sibling: 1; /*!< If set, DMA channel allocator would prefer to allocate new channel in a new pair, and reserve sibling channel for future use */
|
|
} flags;
|
|
} gdma_channel_alloc_config_t;
|
|
|
|
/**
|
|
* @brief GDMA transfer ability
|
|
*
|
|
* @note The alignment set in this structure is **not** a guarantee that gdma driver will take care of the nonalignment cases.
|
|
* Actually the GDMA driver has no knowledge about the DMA buffer (address and size) used by upper layer.
|
|
* So it's the responsibility of the **upper layer** to take care of the buffer address and size.
|
|
*
|
|
*/
|
|
typedef struct {
|
|
size_t sram_trans_align; /*!< DMA transfer alignment for memory in SRAM, in bytes. The driver enables/disables burst mode based on this value. 0 means no alignment is required */
|
|
size_t psram_trans_align; /*!< DMA transfer alignment for memory in PSRAM, in bytes. The driver sets proper burst block size based on the alignment value. 0 means no alignment is required */
|
|
} gdma_transfer_ability_t;
|
|
|
|
/**
|
|
* @brief Type of GDMA event data
|
|
*
|
|
*/
|
|
typedef struct {
|
|
union {
|
|
intptr_t rx_eof_desc_addr; /*!< EOF descriptor address of RX channel */
|
|
intptr_t tx_eof_desc_addr; /*!< EOF descriptor address of TX channel */
|
|
};
|
|
} gdma_event_data_t;
|
|
|
|
/**
|
|
* @brief Type of GDMA event callback
|
|
* @param dma_chan GDMA channel handle, created from `gdma_new_channel`
|
|
* @param event_data GDMA event data
|
|
* @param user_data User registered data from `gdma_register_tx_event_callbacks` or `gdma_register_rx_event_callbacks`
|
|
*
|
|
* @return Whether a task switch is needed after the callback function returns,
|
|
* this is usually due to the callback wakes up some high priority task.
|
|
*
|
|
*/
|
|
typedef bool (*gdma_event_callback_t)(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data);
|
|
|
|
/**
|
|
* @brief Group of supported GDMA TX callbacks
|
|
* @note The callbacks are all running under ISR environment
|
|
*
|
|
*/
|
|
typedef struct {
|
|
gdma_event_callback_t on_trans_eof; /*!< Invoked when TX engine meets EOF descriptor */
|
|
} gdma_tx_event_callbacks_t;
|
|
|
|
/**
|
|
* @brief Group of supported GDMA RX callbacks
|
|
* @note The callbacks are all running under ISR environment
|
|
*
|
|
*/
|
|
typedef struct {
|
|
gdma_event_callback_t on_recv_eof; /*!< Invoked when RX engine meets EOF descriptor */
|
|
} gdma_rx_event_callbacks_t;
|
|
|
|
/**
|
|
* @brief Type of GDMA engine trigger
|
|
* @note It's recommended to initialize this structure with `GDMA_MAKE_TRIGGER`.
|
|
*
|
|
*/
|
|
typedef struct {
|
|
gdma_trigger_peripheral_t periph; /*!< Target peripheral which will trigger DMA operations */
|
|
int instance_id; /*!< Peripheral instance ID. Supported IDs are listed in `soc/gdma_channel.h`, e.g. SOC_GDMA_TRIG_PERIPH_UART0 */
|
|
} gdma_trigger_t;
|
|
|
|
/**
|
|
* @brief Helper macro to initialize GDMA trigger
|
|
* @note value of `peri` must be selected from `gdma_trigger_peripheral_t` enum.
|
|
* e.g. GDMA_MAKE_TRIGGER(GDMA_TRIG_PERIPH_UART,0)
|
|
*
|
|
*/
|
|
#define GDMA_MAKE_TRIGGER(peri, id) \
|
|
(gdma_trigger_t) { .periph = peri, .instance_id = SOC_##peri##id }
|
|
|
|
/**
|
|
* @brief A collection of strategy item that each GDMA channel could apply
|
|
*
|
|
*/
|
|
typedef struct {
|
|
bool owner_check; /*!< If set / clear, DMA channel enables / disables checking owner validity */
|
|
bool auto_update_desc; /*!< If set / clear, DMA channel enables / disables hardware to update descriptor automatically (TX channel only) */
|
|
} gdma_strategy_config_t;
|
|
|
|
/**
|
|
* @brief Create GDMA channel
|
|
* @note This API won't install interrupt service for the allocated channel.
|
|
* If interrupt service is needed, user has to register GDMA event callback by `gdma_register_tx_event_callbacks` or `gdma_register_rx_event_callbacks`.
|
|
*
|
|
* @param[in] config Pointer to a collection of configurations for allocating GDMA channel
|
|
* @param[out] ret_chan Returnned channel handle
|
|
* @return
|
|
* - ESP_OK: Create DMA channel successfully
|
|
* - ESP_ERR_INVALID_ARG: Create DMA channel failed because of invalid argument
|
|
* - ESP_ERR_NO_MEM: Create DMA channel failed because out of memory
|
|
* - ESP_FAIL: Create DMA channel failed because of other error
|
|
*/
|
|
esp_err_t gdma_new_channel(const gdma_channel_alloc_config_t *config, gdma_channel_handle_t *ret_chan);
|
|
|
|
/**
|
|
* @brief Connect GDMA channel to trigger peripheral
|
|
*
|
|
* @note Suggest to use helper macro `GDMA_MAKE_TRIGGER` to construct parameter `trig_periph`. e.g. GDMA_MAKE_TRIGGER(GDMA_TRIG_PERIPH_SHA,0)
|
|
* @note Connecting to a peripheral will also reset the DMA FIFO and FSM automatically
|
|
*
|
|
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @param[in] trig_periph GDMA trigger peripheral
|
|
* @return
|
|
* - ESP_OK: Connect GDMA channel successfully
|
|
* - ESP_ERR_INVALID_ARG: Connect GDMA channel failed because of invalid argument
|
|
* - ESP_ERR_INVALID_STATE: Connect GDMA channel failed because DMA channel is working with another peripheral
|
|
* - ESP_FAIL: Connect GDMA channel failed because of other error
|
|
*/
|
|
esp_err_t gdma_connect(gdma_channel_handle_t dma_chan, gdma_trigger_t trig_periph);
|
|
|
|
/**
|
|
* @brief Disconnect GMA channel from peripheral
|
|
*
|
|
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @return
|
|
* - ESP_OK: Disconnect GDMA channel successfully
|
|
* - ESP_ERR_INVALID_ARG: Disconnect GDMA channel failed because of invalid argument
|
|
* - ESP_ERR_INVALID_STATE: Disconnect GDMA channel failed because DMA channel is not connected to any peripheral
|
|
* - ESP_FAIL: Disconnect DMA channel failed because of other error
|
|
*/
|
|
esp_err_t gdma_disconnect(gdma_channel_handle_t dma_chan);
|
|
|
|
/**
|
|
* @brief Set DMA channel transfer ability
|
|
*
|
|
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @param[in] ability Transfer ability, e.g. alignment
|
|
* @return
|
|
* - ESP_OK: Set DMA channel transfer ability successfully
|
|
* - ESP_ERR_INVALID_ARG: Set DMA channel transfer ability failed because of invalid argument
|
|
* - ESP_FAIL: Set DMA channel transfer ability failed because of other error
|
|
*/
|
|
esp_err_t gdma_set_transfer_ability(gdma_channel_handle_t dma_chan, const gdma_transfer_ability_t *ability);
|
|
|
|
/**
|
|
* @brief Apply channel strategy for GDMA channel
|
|
*
|
|
* @param dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @param config Configuration of GDMA channel strategy
|
|
* - ESP_OK: Apply channel strategy successfully
|
|
* - ESP_ERR_INVALID_ARG: Apply channel strategy failed because of invalid argument
|
|
* - ESP_FAIL: Apply channel strategy failed because of other error
|
|
*/
|
|
esp_err_t gdma_apply_strategy(gdma_channel_handle_t dma_chan, const gdma_strategy_config_t *config);
|
|
|
|
/**
|
|
* @brief Delete GDMA channel
|
|
* @note If you call `gdma_new_channel` several times for a same peripheral, make sure you call this API the same times.
|
|
*
|
|
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @return
|
|
* - ESP_OK: Delete GDMA channel successfully
|
|
* - ESP_ERR_INVALID_ARG: Delete GDMA channel failed because of invalid argument
|
|
* - ESP_FAIL: Delete GDMA channel failed because of other error
|
|
*/
|
|
esp_err_t gdma_del_channel(gdma_channel_handle_t dma_chan);
|
|
|
|
/**
|
|
* @brief Get the channel ID
|
|
*
|
|
* @note This API breaks the encapsulation of GDMA Channel Object.
|
|
* With the returned channel ID, you can even bypass all other GDMA driver API and access Low Level API directly.
|
|
*
|
|
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @param[out] channel_id Returned channel ID
|
|
* @return
|
|
* - ESP_OK: Get GDMA channel ID successfully
|
|
* - ESP_ERR_INVALID_ARG: Get GDMA channel ID failed because of invalid argument
|
|
* - ESP_FAIL: Get GDMA channel ID failed because of other error
|
|
*/
|
|
esp_err_t gdma_get_channel_id(gdma_channel_handle_t dma_chan, int *channel_id);
|
|
|
|
/**
|
|
* @brief Set GDMA event callbacks for TX channel
|
|
* @note This API will install GDMA interrupt service for the channel internally
|
|
*
|
|
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @param[in] cbs Group of callback functions
|
|
* @param[in] user_data User data, which will be passed to callback functions directly
|
|
* @return
|
|
* - ESP_OK: Set event callbacks successfully
|
|
* - ESP_ERR_INVALID_ARG: Set event callbacks failed because of invalid argument
|
|
* - ESP_FAIL: Set event callbacks failed because of other error
|
|
*/
|
|
esp_err_t gdma_register_tx_event_callbacks(gdma_channel_handle_t dma_chan, gdma_tx_event_callbacks_t *cbs, void *user_data);
|
|
|
|
/**
|
|
* @brief Set GDMA event callbacks for RX channel
|
|
* @note This API will install GDMA interrupt service for the channel internally
|
|
*
|
|
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @param[in] cbs Group of callback functions
|
|
* @param[in] user_data User data, which will be passed to callback functions directly
|
|
* @return
|
|
* - ESP_OK: Set event callbacks successfully
|
|
* - ESP_ERR_INVALID_ARG: Set event callbacks failed because of invalid argument
|
|
* - ESP_FAIL: Set event callbacks failed because of other error
|
|
*/
|
|
esp_err_t gdma_register_rx_event_callbacks(gdma_channel_handle_t dma_chan, gdma_rx_event_callbacks_t *cbs, void *user_data);
|
|
|
|
/**
|
|
* @brief Set DMA descriptor address and start engine
|
|
*
|
|
* @note This function is allowed to run within ISR context
|
|
* @note This function is also allowed to run when Cache is disabled, if `CONFIG_GDMA_CTRL_FUNC_IN_IRAM` is enabled
|
|
*
|
|
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @param[in] desc_base_addr Base address of descriptors (usually the descriptors are chained into a link or ring)
|
|
* @return
|
|
* - ESP_OK: Start DMA engine successfully
|
|
* - ESP_ERR_INVALID_ARG: Start DMA engine failed because of invalid argument
|
|
* - ESP_FAIL: Start DMA engine failed because of other error
|
|
*/
|
|
esp_err_t gdma_start(gdma_channel_handle_t dma_chan, intptr_t desc_base_addr);
|
|
|
|
/**
|
|
* @brief Stop DMA engine
|
|
*
|
|
* @note This function is allowed to run within ISR context
|
|
* @note This function is also allowed to run when Cache is disabled, if `CONFIG_GDMA_CTRL_FUNC_IN_IRAM` is enabled
|
|
*
|
|
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @return
|
|
* - ESP_OK: Stop DMA engine successfully
|
|
* - ESP_ERR_INVALID_ARG: Stop DMA engine failed because of invalid argument
|
|
* - ESP_FAIL: Stop DMA engine failed because of other error
|
|
*/
|
|
esp_err_t gdma_stop(gdma_channel_handle_t dma_chan);
|
|
|
|
/**
|
|
* @brief Make the appended descriptors be aware to the DMA engine
|
|
*
|
|
* @note This function is allowed to run within ISR context
|
|
* @note This function is also allowed to run when Cache is disabled, if `CONFIG_GDMA_CTRL_FUNC_IN_IRAM` is enabled
|
|
* @note This API could also resume a paused DMA engine, make sure new descriptors have been appended to the descriptor chain before calling it.
|
|
*
|
|
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @return
|
|
* - ESP_OK: Send append command to DMA engine successfully
|
|
* - ESP_ERR_INVALID_ARG: Send append command to DMA engine failed because of invalid argument
|
|
* - ESP_FAIL: Send append command to DMA engine failed because of other error
|
|
*/
|
|
esp_err_t gdma_append(gdma_channel_handle_t dma_chan);
|
|
|
|
/**
|
|
* @brief Reset DMA channel FIFO and internal finite state machine
|
|
*
|
|
* @note This function is allowed to run within ISR context
|
|
* @note This function is also allowed to run when Cache is disabled, if `CONFIG_GDMA_CTRL_FUNC_IN_IRAM` is enabled
|
|
* @note Resetting a DMA channel won't break the connection with the target peripheral
|
|
*
|
|
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
|
|
* @return
|
|
* - ESP_OK: DMA channel reset successfully
|
|
* - ESP_ERR_INVALID_ARG: DMA channel reset failed due to invalid arguments
|
|
* - ESP_FAIL: DMA channel reset failed due to other errors
|
|
*/
|
|
esp_err_t gdma_reset(gdma_channel_handle_t dma_chan);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|